Gebruiksaanwijzing /service van het product XL-GPS van de fabrikant Symmetricom
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XL-GPS T ime & Frequency System User Guide 997-01530-01, Re v . C, January 2008.
Notices Symmetricom, Inc. T iming T est & Measurement 3750 We stwind Blvd. Santa Rosa, CA 95 403-1053 http://www .symmetricom.com Copyright © 2006 Symme tricom, Inc.
997-01530-01, Rev. C-25, Jan 2 008 i 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS T able of Contents Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii Limited Warranty .
ii 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 3: Installation/Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 Installing the GPS Antenna . . . . .
997-01530-01, Rev. C-25, Jan 2 008 iii 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS F51 – GPS Antenna Cable Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 F52 – Distribution Cable Delay .
iv 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 A: Using F100 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114 Configuring NTP & SNMP Parameters .
997-01530-01, Rev. C-25, Jan 2 008 v 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS F: World Map of Time Zones: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 G: Part Names . . . . . . . . . . . .
vi 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1.
997-01530-01, Rev. C-25, Jan 2 008 vii 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS Pr eface Limited W arranty Each new product manufactured by Symmetricom is warrante d for defects in material or workmanship for a period of one year from date of shipment (“Limit ed W arranty”).
viii 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 Pr oprietary Notice This document, whether p atentable o r non-patenta ble subject matter , embodies propriet ary and confidential information and is the exclusive property of Symmetricom, Inc.
997-01530-01, Rev. C-25, Jan 2 008 1 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1: Overview of the XL-GPS T ime and Fr equency Receiver Pr oduct Description and Features .
2 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 • 1 MPPS • 5 MPPS • 10 MPPS • Optional Programmable Pulse • Optional Alarm Relay In .
997-01530-01, Rev. C-25, Jan 2 008 3 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 2: System Specifications Chassis The chassis is a 19-inch rack-mounte d 1U chassis. Envir onmental T ime and Frequency Accuracy GPS Reference T ime and frequency accuracy/stability while locked to a GPS timing reference: Size: 1.
4 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 AC Power Supply Input S tandard I/O The following specificati ons apply to the connectors on the Main CPU card. RS-232/RS-422 Interface The standa rd serial data port is a bi-direct ional EIA st andard RS 232C interface.
997-01530-01, Rev. C-25, Jan 2 008 5 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS Network Port 10/100 The Ethernet port interface is: J1 - Optional TI/ET The TI/ET configuration is via the Keypad, Serial I/O , and Network port.
6 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 J2 - Optional Programmable Pulse Out (PPO) The PPO allows generation of a pre cisely synchroniz ed trigger pulse at an arbitrary time and with arbitrary pulse width in integer multiples of 1 μ S .
997-01530-01, Rev. C-25, Jan 2 008 7 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS Code Out The default output is IRIG-B-120 AM. Configuratio n is via the Keypad, Serial I/O, and Network port. Five flags are encoded in the control function segm ent of the IRIG B code.
8 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 GPS T ime and Frequency Refer ence GPS T ime and Frequency reference co nfiguration is via the Keypad, Seria l I/O, and Network port. Options Expansion Module (87-8034) The expan sion module provides four independent ly-configurable output s.
997-01530-01, Rev. C-25, Jan 2 008 9 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS IRIG Code Out Alarm Rates Optional Programmable Pulse Optional Alarm Relay NTP The stand a.
10 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 Support for version 3.0 of the NTP , RFC 1305 as well as the Simple Network T ime Protocol (SNTP), RFC1361 is available. In addition, the NTS wi ll respond to TIME p rotocol requests, RFC868.
997-01530-01, Rev. C-25, Jan 2 008 11 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS Oscillators S tandard TCVCXO Optional OCXO Certification Calibration S tatement This unit does not co ntain user-serviceable p arts and does not require calib ration.
12 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 V olatility S tatement S t atement of V olatility for the XL-GPS Model 1530-602. This document only pert ains to the XL-GPS main processor board, the 86-8000.
997-01530-01, Rev. C-25, Jan 2 008 13 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 3: Installation/Configuration Installing the GPS Antenna For XL-GPS units in clude a standard GPS receiver , antenna, and antenna cable. Inst all as described below .
14 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 or conduit that is rigid enough to withstand high winds without fle xing. Use guy wires to stabilize mast s longer than 10 ft. (3.048 m). Notes: • The XL-GPS requires a 12 V olt-compatible antenna.
997-01530-01, Rev. C-25, Jan 2 008 15 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS GPS Signal S trength Requirements Refer to Figure 2: The required g ain at the GPS receiver ’s ANTENNA connector is greater than 20 dB and less than 36 dB.
16 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 – J2 Output (Rate, PPO) ” on page 96 , “ F1 13 – J3 Input (Freq Meas) ” on page 100 .
997-01530-01, Rev. C-25, Jan 2 008 17 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS Notes: • T o prevent remote network access to the XL-G PS, change Remote Lockout to LOCK.
18 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 the Eastern T ime Zone portion of th e S tate of Indiana, and most of Arizona (Navajo Indian Reservation in observes DST). - Throughout the European Union (EU), Summer T i me begins and ends at 1 am UTC.
997-01530-01, Rev. C-25, Jan 2 008 19 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS Connect a null-modem cable from the PC’ s se rial port to the XL-GPS’s “SERIAL I/O” port. If needed, configure your PC’ s terminal emulation pr ogram to match the serial port settings above (9600, 8, N, 1).
20 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 Installing the Expansion Module W arning: Inst alling and removing the exp ansion module can expose dangerous volt ages that can cause electric shock resulting in injury o r death.
997-01530-01, Rev. C-25, Jan 2 008 21 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS at the factory per the customer sales order . T o change the configuration, identify the jumper at JP2 that corresponds to the output you are configuring.
22 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 generate 10 MPPS and the proced ure would be complete.
997-01530-01, Rev. C-25, Jan 2 008 23 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS Rack Mounting the XL-GPS The XL-GPS comes with the following part s needed to mount the XL-GPS securely in an y EIA standard 19-inch (48.
24 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 Note: Ensure that the ambient o perating temperature does not exceed +50 ° C. Install the XL-GPS chassis so that the top and bottom h oles are unobstructed and have suf ficient clearance to allow 6 cfm of air to pa ss through the chassis.
997-01530-01, Rev. C-25, Jan 2 008 25 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 4: User Interfaces The XL-GPS features two user interfaces for controlling the XL-GPS’s.
26 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 T ime Display related functions: • Select between the 12 or 24 hour format d isplayed: “ F2 – 12/24 Hour Format ” on page 35 . • Select between Local, S tandard, UTC, and GPS time: “ F69 – T ime Mode ” on page 61 .
997-01530-01, Rev. C-25, Jan 2 008 27 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS Pressing the UP ARROW key increment s to the nex t function, F2 - 12/24 HOUR FORMA T , and so on.
28 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 T o open a function using ENTER: T o open a function using MENU: T o change the settings in a.
997-01530-01, Rev. C-25, Jan 2 008 29 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS T o enter numeric values in a function: Command Line Interface T o open a command line session, connect to the serial or network port using a terminal or a terminal emulation program on a PC.
30 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 If you try to use a function t hat is not accessible from the guest login, you will see a message such as “Access denied” or “Command canceled”.
997-01530-01, Rev. C-25, Jan 2 008 31 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS f100 IP:192.168.46.1 50 SM:255.255. 255.
32 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 5: Function Refer ence Function Summary The following summary list s all the XL-GPS functions, identifies the user interface s from which each one is available, and provides a br ief descrip tion of the function.
997-01530-01, Rev. C-25, Jan 2 008 33 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS F71 – Oscillator S tatistics K, N, S Display the XL-GPS oscilla tor ’s phase, of fset.
34 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 F1 – T ime Zone Offset Use function F1 to display an d set the time zone of fset between your S tandard T ime zone and Unive rsal T ime Coordinated (UTC).
997-01530-01, Rev. C-25, Jan 2 008 35 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS where: For example, to set the time zone of fset, enter: F1 –8:00<CR> XL-GPS resp.
36 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 Note: Local time is commonly disp layed in both 12 and 24 formats. Th e specifications for S t andard, UTC, and GPS call for using the 24-hour forma t.
997-01530-01, Rev. C-25, Jan 2 008 37 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS F3 – T ime & Date When an optional oscilla tor is used because a GPS signal is unavailabl e, use function F3 to manually set the XL-GPS system clock’ s time and date.
38 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 For example, to display the date and t ime, send: F3<CR> XL-GPS responds: F3 UTC 01/01/.
997-01530-01, Rev. C-25, Jan 2 008 39 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS where: Note: Parity - NONE is only available/valid wh en Data Bits is set to 8.
40 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 corresponding time quality characters in text output s of F8 and F9.
997-01530-01, Rev. C-25, Jan 2 008 41 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS For example, to display the time qualit y status and flags, enter: F5<CR> If F5 is .
42 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 where: For example, to display the Keyp ad Lock status, send: F6<CR> XL-GPS responds: F.
997-01530-01, Rev. C-25, Jan 2 008 43 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS reference source and synchronize s with it, F8 displays the new time-of-year information.
44 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 The time quality character , “Q”, is one of the following charact ers: The four time quality thresholds are set by F5 – T ime-Quality Setup .
997-01530-01, Rev. C-25, Jan 2 008 45 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS The default output string is as follows: <SOH>DDD:HH:MM:SS.
46 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 F1 1 – Time Output Format Use function F1 1 to review or change the format of the time output string used in F8 and F9. The as- shipped factory setting for F1 1 format is null, which enables F8’s and F9’ s default time output format s.
997-01530-01, Rev. C-25, Jan 2 008 47 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS T o see the T ime Output Format, enter: F11<CR> XL-GPS responds: F11 DDD:HH:MM:SS.
48 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 XL-GPS responds: OK<CR> With the above settings, F8 displays: <SOH>|10:45:01*<CR>< LF> With the above settings, F9 displays: <SOH>|10:45:01.
997-01530-01, Rev. C-25, Jan 2 008 49 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS XL-GPS responds (example): F13 TIME ERROR -0.
50 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 Keypad When Position Mode is “LL A”, the position of the antenna is displayed in degrees,.
997-01530-01, Rev. C-25, Jan 2 008 51 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS where: For example, to display the LLA coordinates of the ante nna, enter: F50 LLA<CR> XL-GPS responds (example): F50 N 38d23'51.
52 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 where: For example: F50 XYZ<CR> XL-GPS responds (example): F50 X –4474331m Y 2668899m Z –36 68099m<CR><LF> F51 – GPS Antenna Cable Delay Use function F51 to display or configure the GPS ant enna cable delay .
997-01530-01, Rev. C-25, Jan 2 008 53 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS The XL-GPS responds using the following format: F51<S><+><DELAY>ns<C.
54 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 T o calculate what the setting should be, multiply the delay/foot by the leng th of the cable in feet. The typical delays for the following cable t ypes are: • RG-58 – approximately 1.
997-01530-01, Rev. C-25, Jan 2 008 55 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS F53 – GPS Operation Mode Use function F53 to set the GPS M12 Receiver in Time Mode or Dynamic Mode . Select “Dynamic Mode” if the position of the rece iv er is subject to frequent change, or if it is in continuous motion.
56 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 where: For example, enter: F53<CR> Example response: F53 TIME MODE (or DYNAMIC MODE)<.
997-01530-01, Rev. C-25, Jan 2 008 57 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS • Current: the XL-GPS is using the satellite’ s GPS signal to calculate time and position. • Bad: the GPS satellite is transmitting in fo rmation that it has been removed from service.
58 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 F60 prn1 good curren t -159dBW F60 prn2 good curren t -162dBW F60 prn3 good curren t -163dBW .
997-01530-01, Rev. C-25, Jan 2 008 59 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS Command Line T o display the current status of F 66, enter a command using the following .
60 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 where: For example, enter: F66 MANUAL 02 1 1 04 02 0 1 10 Meaning: • Manual settings are in ef fect. • The entry time is 02 a.m., week 1 (first), day 1 (Sunday), month 4 (April) • The exit time is 02 a.
997-01530-01, Rev. C-25, Jan 2 008 61 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS F69 – T ime Mode Use function F69 to select the time type displayed by: • The XL-GPS.
62 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 For example, enter: F69<CR> XL-GPS gives one of the following response s: F69 GPS <C.
997-01530-01, Rev. C-25, Jan 2 008 63 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS The phase is the instan taneous error in seconds betwe en the oscillator and the control loop zero servo point.
64 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 F72 – Fault S tatus Use function F72 to display the fault st atus of the clock.
997-01530-01, Rev. C-25, Jan 2 008 65 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS Upate the ala rm settings when adding or remo ving the exp ansion module from the XL-GPS. Alarms - General Information With Alarm Disabled, an F73 indicator do es not trigger and alarm when it enters an Unlocked or Fault state.
66 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 Alarm Definitions Clock S tatus Locked: The XL-GPS clock is locked to the GPS reference source and is operating within the F73 T ime Error Threshold.
997-01530-01, Rev. C-25, Jan 2 008 67 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS LED Blink When LED Blink is enabled, the Alarm S tatus LED on th e front p anel blinks when it is green or amber . The LED does not blink when it is red, even if LED Blink is enable d.
68 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 Save Changes Y es: Applies all user-entered changes to the F7 3 configuration.
997-01530-01, Rev. C-25, Jan 2 008 69 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS T o display the latched faults, enter: F73 LATCH The XL-GPS responds in the following for.
70 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 Where the value of each chara cter in <123456789ABCDEFG HIJ> field is either 'E' or 'D'. 'E' means the corresponding indicator is enabled, and can trigger an al arm if it enters a fault state.
997-01530-01, Rev. C-25, Jan 2 008 71 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS The XL-GPS responds: F73<SP>THRESHOLD<SP> <nanoseconds><SP>ns<CR><LF> where <nanoseconds>is the time error threshold in n anoseconds, between 0 and 9999.
72 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 Use the SUPPRESS command to suppress all F73 faults fro m triggering alarms for a specified duration after the XL-GPS p ower is turned on.
997-01530-01, Rev. C-25, Jan 2 008 73 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS Although the factory configuration o utputs UTC time in 24-hour fo rmat, the following ca.
74 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 F100 – Network Port Configuration & XL-GPS Firmwar e F100 provides two group s of comma.
997-01530-01, Rev. C-25, Jan 2 008 75 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS The following tab le gives the command line equiv alents f or each of the preceding param.
76 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 F100 EA – Ethernet Address Use function F100 EA to display the Ethernet Add ress (MAC Addre.
997-01530-01, Rev. C-25, Jan 2 008 77 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS For example, enter: F100 IP 206.54.0.21< CR> XL-GPS responds: OK<CR><LF>.
78 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 where: For example, enter: F100 SM 255.255.255.
997-01530-01, Rev. C-25, Jan 2 008 79 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS where: For example, enter: F100 G 206.54.
80 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 selecting between 10 Base-T and Auto. If you h ave questions about your unit, contact H: Sales an d Customer Assist ance (page 143) .
997-01530-01, Rev. C-25, Jan 2 008 81 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS where: For example, enter: F100 LOCK<CR> T o users on the serial port, XL-GPS responds: OK<CR><LF> Or , to users on the network port, XL-GPS gives t he following response and then closes the port: GOODBYE.
82 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 XL-GPS responds: F100 L LOCKED<CR><LF > or F100 L UNLOCKED<CR>< LF> F100 ST – Self T est S tatus Use function F100 ST to display wheth er the Self T est S t atus parameters p assed or failed.
997-01530-01, Rev. C-25, Jan 2 008 83 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS where: An example of the response is: F100 ST FLASH/CRC : PASS, RAM : PA SS, SERIAL : PAS.
84 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 T o write the BootLoader to the flash, send the F100 BH command with the FTP host, file p ath and name, and then enter: F100 BUB<CR> XL-GPS responds: OK<CR><LF> For example: >f100 bub OK BURNING FILE 192-800 0.
997-01530-01, Rev. C-25, Jan 2 008 85 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS SEC: 20 RE: 0 SEC: 21 RE: 0 SEC: 22 RE: 0 SEC: 23 RE: 0 SEC: 24 RE: 0 SEC: 25 RE: 0 SEC: .
86 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 The existence of the FPGA p rogram file on the FTP server and an Ethernet connection is checked when the command is issued.
997-01530-01, Rev. C-25, Jan 2 008 87 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS F100 CONFIG – Configur e NTP & SNMP Notes: • See “ A: Using F100 Configuration ” on p age 1 14. • NTP is an optional feature. If purchased at the same time as the XL-GPS, it comes enabled on the system.
88 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 T o move the SNMP config file back onto the XL-GPS, type: >f100 config snmp se t host:<.
997-01530-01, Rev. C-25, Jan 2 008 89 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS XL-GPS responds: F100 J FACTORY MODE = 1<CR><LF> or F100 J FACTORY MODE = 0<CR><LF> F100 K I L L – Reboot Use function F100 K I L L to reboot t he unit.
90 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 SYMMETRICOM GPS DEVI CE. XL-GPS INITIALIZATION SUCCE SSFULLY COMPLE TED. > F100 P – Change User Password Use function F100 P to change a u ser password.
997-01530-01, Rev. C-25, Jan 2 008 91 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS F100 PI – PING Use function F100 PI to ping a remote host to see if it is re achable.
92 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 where: XL-GPS responds: ENTER NEW USER NAME: When you enter a new user name, XL- GPS responds: CONFIRM NEW USER NAM E: Enter the same new user name again, to conf irm t he spelling.
997-01530-01, Rev. C-25, Jan 2 008 93 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS F108 – Oscillator Configuration Use function F108 to display the type of oscillator being used: •T C X O •O C X O For oscillator s pecifications, see “ Oscillators ” on p age 1 1 .
94 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 F1 10 performs two sep arate functions: • Configure the J1 input port for a TIET signal • Display TIET information. Keypad • J1 Input Config : Displays “DISABLE” if the function has not been purchas ed and installed.
997-01530-01, Rev. C-25, Jan 2 008 95 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS Sample request: F110<CR> XL-GPS responds (example): F110 TIET 50 POSITIV E<CR>.
96 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 F1 1 1 – J2 Output (Rate, PPO) Use function F1 1 1 to configure the J2 Output to generate one of several rate s or , optionally , a Programmable Pulse Output (PPO).
997-01530-01, Rev. C-25, Jan 2 008 97 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS F111<S><RATE><CR><LF > Or F111<S>PPO<S><START> .
98 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 OK<CR><LF> Single PPO pulse output For example, to produce a a single pulse with duration of 1 second on January 1, enter: F111 PPO 001:00:00:0 0.
997-01530-01, Rev. C-25, Jan 2 008 99 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS For example, to produce a repe titive 5 micros econd pulse occurring every 10 microseconds (i.
100 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 Or , for example, to produce a repetitive one-microsecond pulse occu rring on every hour , enter: F111 PPO XXX:XX:10:0 0.
997-01530-01, Rev. C-25, Jan 2 008 101 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS Theory of Operatio n: Freq Meas uses a heterodyne phase error mu ltiplier to achieve high resolution at short sample periods.
102 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 For example, enter: F113<CR> The XL-GPS displays the current configura tion (example):.
997-01530-01, Rev. C-25, Jan 2 008 103 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS Where For example, enter: F113 SHOW<CR> XL-GPS responds (example): Interval is 1 second s<CR><LF> +9.600000e-10<CR><LF > +1.
104 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 where: For example, enter: F117<CR> XL-GPS responds: F117 SN 31234<CR><LF >.
997-01530-01, Rev. C-25, Jan 2 008 105 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS • GPS Acquisition S tate - (Dynamic Mode, S top Site Survey , S top TRAIM, S tart Site.
106 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 Following initialization, the f ront panel display of an XL-GPS with only one G PS receiver .
997-01530-01, Rev. C-25, Jan 2 008 107 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS reestablish it s current most accurate position. • Position Hold: The receiver has determined its most accurate position, and is using this static position to calculate its most accurat e time solution.
108 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 where: XL-GPS responds: OK<CR><LF> F126 – Options Key Entry Use function F126 to enter the Option s Key , which enables certain functions (e.
997-01530-01, Rev. C-25, Jan 2 008 109 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 6: GPS M12 Receiver (87-8028-2) Intr oduction The optional GPS M12 Receiver act s as a S tratum 0 timing reference source to the XL-GPS T ime and Frequency System.
110 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 • “ F51 – GPS Antenna Cable Delay ” on page 52 • “ F60 – GPS Receiver Satellit.
997-01530-01, Rev. C-25, Jan 2 008 111 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 7: XL-GPS-Generated Messages Err or Messages ERROR 01 VALUE OUT OF RANGE Y ou entered a command using the correct forma t that contained a value, probably numeric, that was outside the range of acceptable valu es.
112 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 Recovery Action: V erify correct parameter values. If correct, restart the XL-GPS. If this error me ssage persists, cont act Symmetricom T echnical Customer Service.
997-01530-01, Rev. C-25, Jan 2 008 113 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS Informational Messages Messages in this section inform you of an ev ent and do not require any action on your part. Deleted previously set IP host address Y our last action deleted the previously set IP host address.
114 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 A: Using F100 Configuration Configuring NTP & SNMP Parameters F100 CONFIG instructs the XL -GPS unit to transfer its NTP and SNMP configura tion files to an FTP server so the user can edit them.
997-01530-01, Rev. C-25, Jan 2 008 115 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS For other operating systems and configurat ions, cons ult the appropriate document ation for obtaining the FTP server ’s IP address.
116 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 Edit the Configuration Files In Windows, edit the configuration files using a text editor such as Notepad or W ordp ad. For more informati on, see “ D: Network T ime Protocol (NTP) ” on page 135 .
997-01530-01, Rev. C-25, Jan 2 008 117 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS Resetting... If you get “ Error: Can’t open so urce file ”, verify that the FTP server ’s <<Local Server>> is running.
118 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 B: Upgrading System Firmwar e Caution: Consideration must be given to the firmware and the har dwar e version numbers of the XL-GPS and it’ s optional components.
997-01530-01, Rev. C-25, Jan 2 008 119 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS network traf fic raises the possibili ty that the system sof tware files could be corrupted, yielding the XL-GPS inoperable. T elnet to the XL-GPS over the network.
120 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 Then ‘burn’ the bootload er to the XL-GPS’s flash memory by entering: F100 bub XL-GPS responds: OK BURNING FILE 192-800 0.
997-01530-01, Rev. C-25, Jan 2 008 121 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS Then do the same for the ‘file system’ (.f s) file: F100 bh <IP_address> <relative_pat h>/<file.fs> For example: F100 bh 192.
122 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 Message: >Can't set the burn host - wrong IP address Cause: The IP address entered for the FTP server is incorrect. Check that you've entered the IP address of the FTP server (not the XL-GPS) and re-en ter if necessary .
997-01530-01, Rev. C-25, Jan 2 008 123 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS An example XL-GPS response is: F100 VER BOOTLOADER 192-8000 SOFTWARE 192-8001 FILE SYSTEM 192-8002v1.80 NVRAM VER 5 PROJ REV #1.80 The “ PROJ REV ” number is the firmware version number .
124 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 C: SNMP The mibs for this product are ava ilable on the product CD. Key: SNMP Private Enterprise MIB S tructure This section describes the top le vel structure & de sign of the XL-GPS SNMP Private Enterprise MIB.
997-01530-01, Rev. C-25, Jan 2 008 125 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS For the XL-GPS, groups 1, 2, 3 , 4 and 5 have been deprecated and a new group 6, product s, has been added.
126 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 ID is defined as Symmetricom.product s.xlGps for the XL-GPS product and Symmetricom.prod ucts.xxx for all subsequent product s. XL-GPS System Group The xlGp sSystem system group cont ains the systemFault and the systemS tatu s groups.
997-01530-01, Rev. C-25, Jan 2 008 127 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS The XL-GPS Fault Group Note : For the figures in this ch apter , substitute “xlgps” for “xli”. The XL-GPS systemAlarmData group defines SNMP traps and cannot be directly retrieved by the SNMP manager .
128 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 The systemFaultConfig sub-group cont ains parameters to contro l the generation of system ala rms. The timeout, threshold and power on suppress values are cont ained in the systemFaultConfigData group .
997-01530-01, Rev. C-25, Jan 2 008 129 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS XL-GPS MainCard Group Note : For the figures in this ch apter , substitute “xlgps” for “xli”. At present the xlGpsMainCard group cont ains only the NTP subg roup as shown above.
130 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 This model makes adding additional p roducts and mainta inin g compatibility a straight forward process. Each additional product will be g iven a branch in the tree under enterprises.
997-01530-01, Rev. C-25, Jan 2 008 131 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 12,000 private addresses and Symmetricom is by comp arison one of the earlier adopter s .
132 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 system. Click the <OK> button again to con firm the action. 4. Click the <Close> button to exit the “Load/Unload MIBs:SNMP” dialogue box.
997-01530-01, Rev. C-25, Jan 2 008 133 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS Additional OpenView con figuration 1. Select the menu item “Options->SNMP Configuration”. A popup titled “SNMP Configuratio n” will ap- pear .
134 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 9. Select the menu item “xlGp s->Configuration”. In the popup “xlGpsconfig” verify that the “maskPll- Synthesizer” entry is set to “enabled”.
997-01530-01, Rev. C-25, Jan 2 008 135 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS D: Network T ime Pr otocol (NTP) As an option, Symmetricom can factory config ure t he XL-GPS to function as a S tratum 1 network time server .
136 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 Editing MD5 keys on the XL-GPS NTP keys are needed if you are using NTP in b roadcast mode with MD5 authentication. This (and the following) section provide configura tion guidelines.
997-01530-01, Rev. C-25, Jan 2 008 137 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 2 M TTXL-GPS When you invoke the NTP client at the co mmand line, use the following options: –b to turn on broadcast reception – k /etc/ntp.
138 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 E: T ime Code Formats The following section provides a summa ry description of the three time code types used by the XL-GPS.
997-01530-01, Rev. C-25, Jan 2 008 139 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS beginning of each frame and a positio n identifier mark s the end of every ten elements. IRIG-B has ten position identifiers per frame. The element s prior to position identifier P5 compri se the time of yea r segment.
140 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 Figure 4: IRIG S tandard Format A.
997-01530-01, Rev. C-25, Jan 2 008 141 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS F: W orld Map of T ime Zones:.
142 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 G: Part Names S tandard Chassis • Model XL-GPS 1UChassis w .
997-01530-01, Rev. C-25, Jan 2 008 143 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS H: Sales and Customer Assistance Symmetricom's Sales and Customer Assist ance Center s are a centralized resource to handle a ll your customer needs.
144 997-01530-01, Rev. C-25, Jan 20 08 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1.
997-01530-01, Rev. C-25, Jan 2 008 145 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS Index Numerics 10/100 BASE- T 79 12/24 Hour Format 35 87-8028-2 109 A Accuracy 3 Alarm 2.
146 997-01530-01, Rev. C-25, May 2008 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 CONFIG Parameters 87 Configuration Factory 103 GPS Receiver 104 Oscillator 93 Configure NTP &.
997-01530-01, Rev. C-25, Jan 2 008 147 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS F100 BF – Burn File System 85 F100 BH – Burn Host 83 F100 BU – Burn 84 F100 BUB .
148 997-01530-01, Rev. C-25, May 2008 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 Factory Mode Jumper 88 Fault Status 64 Firmware 74 Firmware Upgrade 118 Format Time Output 46 Freq Me as 6, 100 Frequency Measurement 6, 100 Function Reference 32 Function Summary 32 Future Expansion 129 G G 78 Gateway 78 Goodbye.
997-01530-01, Rev. C-25, Jan 2 008 149 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS K K I L L 89 Keypad Examples 27 Operation 27 Keypad Lock 41 Keypad/Display Interface 25 .
150 997-01530-01, Rev. C-25, May 2008 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 NTP 9 Options Key Entry 108 order stat us 143 order status and schedulin g 143 Oscillator Sta.
997-01530-01, Rev. C-25, Jan 2 008 151 2 5 1 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS Configuring and Testing 131 Glossary of Related Terms 130 SNMP Addressing 124 SNMP Priva.
152 997-01530-01, Rev. C-25, May 2008 SS S SSS S SSS S S SS S S SS S S SS S S SSS S S S S S S SS S SS SS 1 Time-Quality Setup 39 U Upgrading 74 System Firmware 118 US Assistance Center 143 User Interf.
Een belangrijk punt na aankoop van elk apparaat Symmetricom XL-GPS (of zelfs voordat je het koopt) is om de handleiding te lezen. Dit moeten wij doen vanwege een paar simpele redenen:
Als u nog geen Symmetricom XL-GPS heb gekocht dan nu is een goed moment om kennis te maken met de basisgegevens van het product. Eerst kijk dan naar de eerste pagina\'s van de handleiding, die je hierboven vindt. Je moet daar de belangrijkste technische gegevens Symmetricom XL-GPS vinden. Op dit manier kan je controleren of het apparaat aan jouw behoeften voldoet. Op de volgende pagina's van de handleiding Symmetricom XL-GPS leer je over alle kenmerken van het product en krijg je informatie over de werking. De informatie die je over Symmetricom XL-GPS krijgt, zal je zeker helpen om een besluit over de aankoop te nemen.
In een situatie waarin je al een beziter van Symmetricom XL-GPS bent, maar toch heb je de instructies niet gelezen, moet je het doen voor de hierboven beschreven redenen. Je zult dan weten of je goed de alle beschikbare functies heb gebruikt, en of je fouten heb gemaakt die het leven van de Symmetricom XL-GPS kunnen verkorten.
Maar de belangrijkste taak van de handleiding is om de gebruiker bij het oplossen van problemen te helpen met Symmetricom XL-GPS . Bijna altijd, zal je daar het vinden Troubleshooting met de meest voorkomende storingen en defecten #MANUAl# samen met de instructies over hun opplosinge. Zelfs als je zelf niet kan om het probleem op te lossen, zal de instructie je de weg wijzen naar verdere andere procedure, bijv. door contact met de klantenservice of het dichtstbijzijnde servicecentrum.
