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MODEL ME7840A POWER AMPLIFIER TEST SYSTEM OPERA TION AND MAINTENANCE MANUAL 490 JARVIS DRIVE - MORGAN HILL, CA 95037-2809 P/N: 10410-00225 REVISION: A PRINTED: JUNE 2000 COPYRIGHT 2000 ANRITSU CO.
WARRANTY The ANRITSU product(s) listed on the title page is (are) warranted against defects in materials and workmanship for three years from the date of shipment. ANRITSU’s obligation covers repairing or replacing products which prove to be defective during the warranty period.
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Safety Symbols T o prevent the risk of personal injury or loss related to equipment malfunction, ANRITSU Company uses the following symbols to indicate safety-related information. For your own safety , please read the informa - tion carefully BEFORE operating the equipment.
Safety 1 ME7840A OMM Always refer to the operation manual when working near locations at which the alert mark, shown on the left, is attached. If the operation, etc., is performed without heeding the advice in the operation manual, there is a risk of personal injury .
T able of Contents Chapter 1 General Information SCOPE OF THIS MANUAL ...............................1 - 1 INTRODUCTION ....................................1 - 1 RELA TED MANUALS .................................1 - 1 CONVENTIONS .....................
Installation .....................................2 - 7 What else is on the CD? ...............................2 - 7 Uninstalling the software ..............................2 - 7 SER VICE CENTERS ..................................2 - 8 Chapter 3 Operations, General INTRODUCTION .
Gain and IMD Power Sweep ........................... 5-18 POWER SWEEP , ONE TONE ............................. 5-22 Single Frequency Power Sweep .......................... 5-22 I M D ........................................... 5-26 HARMONICS .........
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Figure 1-1. Model ME7840A Power Amplifier T est System (P A TS).
Chapter 1 General Information 1-1 SCOPE OF THIS MANUAL This manual provides operating and maintenance information for the ME7840A Power Amplifier T est System (P A TS, Figure 1-1).
1-4 CONVENTIONS Throughout this manual, the ME7840A Power Amplifier System may be referenced as P A TS or ME7840A; the MS462XC may be referenced as Scorpion or MS462XC; and the MS4782X T est Set may be referenced as T est Set or MS4782X. 1-5 SERIAL NUMBER All ANRITSU instruments are assigned a unique six-digit serial number , such as “940101.
GENERAL INFORMATION HARDWARE DESCRIPTION ME7840A OMM 1-3 AUT POWER METER OPTIONAL SPECTRUM ANAL YZER SYSTEM CONTROLLER (PC) RF1 STEP A TTENUA TOR 70dB, 10dB/step POWER SUPPL Y COMBINER RF2 OPTIONAL MO.
HARDWARE DESCRIPTION GENERAL INFORMATION 1-4 ME 7840A OMM AUT POWER METER OPTIONAL SPECTRUM ANAL YZER SYSTEM CONTROLLER (PC) RF1 a 1 a 2 b 1 b 2 STEP A TTENUA TOR 70dB, 10dB/step POWER SUPPL Y COMBINE.
1-9 SYSTEM DESCRIPTION Brief descriptions of the DRA Scorpion (MS462XC) and MS4782X T est Set are given below . DRA Scorpion The Scorpion Direct Receiver Access (DRA) version V ector Network Mea- surement System (VNMS) (Figure 1-2) functions under control of the soft- ware residing in the PC through GPIB commands.
MS4782X T est Set The Series MS4782X T est Set contains a W ilkinson type combiner that combines the two RF signals from Ports 1 and 3 (RF1 & RF3) of the Scor - pion. External preamplifiers can optionally be provided at the combiner input to boost the input RF power to the amplifier-under - test (AUT).
q Bandwidth: Should be sufficiently wide to cover the frequency band of the AUT . q Isolation: Should be no less than (P o - 27 dB), where P o is the power output in dBm of the AUT . Thus for Po = 47 dBm (50 watts), a 20 dB isolation is required. For a P o greater than 47 dBm up to 50 dBm (100 watts), two circulators in series can be used.
SYSTEM DESCRIPTION GENERAL INFORMATION 1-8 ME 7840A OMM Noise In Noise +28V NO OPERATOR SERVICE- ABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. WARNING CAUTION FOR CONTINUED FIRE PROTECTION REPLACE ONLY WITH SPECIFIED TYPE AND RATED FUSE. IEEE 488.
S 22 ) are not desired, then a circulator is not required. Instead, a through line should be connected between connectors C1 and C2 (Figure 1-5). The MS4782A is shipped from the factory with this through line in place. 1-10 K F ACT OR K factor is a parameter which is sometimes used to indicate the stability of an amplifier .
The functions of the T est Executive, if supplied by ANRITSU or by the customer , would include: q T est Sequence development and management q Part number and serial number management q Interface with.
1-14 SOFTW ARE STRUCTURE The software structure is illustrated in Figure 1-6 (below). GENERAL INFORMATION SOFTWARE STRUCTURE ME7840A OMM 1-11 Anrit su Measurement, Calibration & T uning Modules VNA PowerT ools V4.
1-15 MS7840A OPTIONS The following options are available: 1-16 OPTIONAL ACCESSORIES The accessories described below are available from ANRITSU. q Model ML2430A Power Meter q Model MG3672A Digital Modu.
MS4782D Test Set. The same cable is also used to connect the Test Set to the MS462XC receivers on the rear panel. 1-17 PREVENTIVE MAINTENANCE The ME7840A Power Amplifier T est System does not require any preven - tive maintenance.
PERFORMANCE SPECIFICATIONS GENERAL INFORMATION 1-14 ME 7840A OMM Characteristic V alue Notes Amplifier Under T est Power Output 100 W maximum With MS4782D T est Set and with23 dB isolation between AUT power output and MS4623C, Port 2 50 W maximum With MS4782A T est Set Bandwidth through T est Set 800 MHz to 2.
1-20 RECOMMENDED ITEMS T able 1-2 provides a list of test equipment and other items needed for cal - ibration and performance verification. 1-21 USER SUPPLIED ITEMS The following items required for the operation of the ME7840A Power Amplifier T est System must be supplied by the user .
Chapter 2 Installation 2-1 INTRODUCTION This chapter describes the installation, connection and set-up of the equipment that comprises the ME7840A Power Amplifier T est Station.
A listing of the non-optional-accessories always supplied with P A TS is listed below . The cables and terminators are shown in Figures 2-3 and 2-2, on page 2-3. Item Part No. Quantity Broadband T ermination 28N50LF 2 Control Cable 803-49 1 RF Cables, T ype N connectors (front) 15NN50-0.
INSTALLATION INSTALLATION - HARDWARE ME7840A OMM 2-3 GPIB CABLE GPIB CONNECTOR DEDICA TED GPIB CONNECTOR (Used during power level calibration) CONTROL CABLE EXT PREAMP RF CABLES (4ea) EXTERNAL I/O CONNECTOR CONTROL CABLE AC POWER CORD AC POWER CORD CONTROL IN CONNECT OR CIRCULA T OR C1 C2 C3 OUTPUT INPUT Figure 2-2.
Step 3. Install the four RF cables between the rear of the MS462XC and the T est Set. T orque the cables to 8 inch-pounds (SMA Connectors) or 12 inch-pounds (T ype N connectors). T able 2-1 lists the applicable connectors by designation or function. Step 4.
INSTALLATION INSTALLATION - HARDWARE ME7840A OMM 2-5 EXTERNAL ANALOG IN CONNECTOR CURRENT SENSOR CABLE P ASSAGE CURRENT PROBE HEAD Figure 2-4. Current Probe Connection.
INSTALLATION - HARDWARE INSTALLATION 2-6 ME 7840A OMM Figure 2-5. Software Installation W indow.
2-5 INST ALLA TION - SOFTW ARE ME7840A software is delivered on a CD. The ANRITSU Power T ools li - brary V ersion 4.0 or higher , which is required to be installed on the target system (the PC which is receiving the installation of ME7840A software).
2-6 SERVICE CENTERS ANRITSU Service Centers are listed in T able 2-2. SERVICE CENTERS INSTALLATION 2-8 ME 7840A OMM UNITED ST A TES ANRITSU COMP ANY 685 Jarvis Drive Morgan Hill, CA 95037-2809 T elephone: (408) 776-8300 1-800-ANRITSU F AX: 408-776-1744 FRANCE ANRITSU S.
Chapter 3 Operations, General 3-1 INTRODUCTION The basic operation of the Model ME7840A Power Amplifier T est Station (without external preamplifiers) is described in this and the following two chapters: Calibration Operations and Measurement Operations.
Step 6. When ready for measurements, cautiously apply DC power to the AUT . Step 7. Check that the normally factory-installed RF coaxial “jumper” cable is installed on the rear panel of the T est Set: n MS4782X: Between Ext Preamp Input and Output connectors.
OPERATIONS, GENERAL PREPARING THE SYSTEM ME7840A OMM 3-3 Optional Current Probe Customer Supplied Power Meter for flat test port power calibration Customer Supplied Power Supply for AUT * Connect when directed by procedure for power calibrations * Amplifier Under T est (AUT) T o: Ext.
3-3 USING P A TS SOFTW ARE P A TS software requires a computer with GPIB capability running W in - dows 95 or better (98/NT/2000). The software is started by selecting the “Start” button, then “Programs,” “Pats V1.1,” then “Pats” (Figure 3-2).
3-4 COLLA TERAL FUNCTIONS The P A TS software collateral functions are found on the top menu bar un - der “Files,” “T ools,” and “Help.” (below) File The file menu (below) provides for saving files from the PC to the MS462XC, recalling files from the MS462XC to the PC, and for exiting the system.
q Save Cal Files to PC. Displays a dialog box (similar to that shown for Recall Cal Files from PC , below) showing the cal files stored in the default folder (T emp). This function is useful for saving the front panel setup and calibration data to a file on the PC.
T ools The “T ools” menu (below) displays a drop-down list that provides three collateral options described below . The “Run Calibration Files” option is described in Chapter 4. a. Check Communications to VNA: Runs a test to check that the VNA communicates with the PC.
b. Calibration File Options: Provides options for finding and recalling calibration files (below). These files are used to establish test setup for the measurements de - scribed in Chapter 5. If no file is selected in an area (S Parameter , Power Sweep, IMD, etc.
Chapter 4 Operations, Calibration 4-1 INTRODUCTION Measurements always include a degree of uncertainty due to imperfec - tions in the measurement system. The measured value is always a combi - nation of the actual value plus the systematic measurement errors.
Alternatively , Scorpion front panel settings may be set manually and ap - plied during the automated measurements under P A TS software as fol - lows: q On the Measurement W indow click the Pause button q On the Scorpion front panel press the “Clr / Local” button to take manual control of the Scorpion.
4-5 GENERAL Calibration operations are described in this and the following paragraphs Step 1. Click on “Start,” “Programs,” “Pats V1.1,” then “Pats” (Figure 3-2, page 3-4) to start the software. The P A TS flash screen (below) briefly appears, then the main screen.
sure that the equipment is properly connected to the bus. If so, the following screen will be displayed: Step 3. Click on “Run Calibration Procedure” to display a list of cali - bration specification files (below). (Refer to paragraph 4-3 for a description of these files.
Step 3. Double-click on “A_Power Level.txt.” . The program starts with a linear power calibration (below). Step 4. Before hitting the “Next” button, connect the power meter to at the point where power enters the device-under-test (AUT), which becomes the power reference plane as shown in the prompt.
NOTE The linear power calibration takes up-to-5 minutes to complete. It calibrates the output power at the refer - ence plane for both internal sources (power out of Port 1 then Port 3) according to the target power across the frequency range set in the calibration speci - fication file.
Step 6. Before pressing “Next” disconnect the power sensor and con - nect a throughline between T est Ports 1 and 2 on the MS4782X T est Set, as shown below . Step 7. Press “Next” to perform a receiver calibration. When this cali - bration finishes, the program returns to the main screen.
4-7 HOT S22 The “B_HotS22.txt” file provides prompts for setting up a Hot S 22 specifi - cation file. Hot S 22 is a return loss measurement of an amplifier ’s output port (Port 2) while stimulus is applied to its input port.
Step 3. Press “Next” for the next prompt (below). The 3653 or 3753LF Calibration Kits contain a disk with calibration data. The data has to be installed from the MS462C front panel. T o do so, place the floppy disk from the kit into the MS462XC disk drive.
Step 6. Press “OK” for the next step (below). Connect the Load to Port 2. Step 7. Press “OK” to complete the Hot S 22 calibration. HOT S22 OPERATIONS, CALIBRATION 4-10 ME 7840A OMM.
4-8 S-P ARAMETERS CAL The “C_S-Parameters Cal.txt” file to provides prompts for setting up S-parameters specification file. The prompts cause the Scorpion to be placed into a state where it is ready to make calibrated measurements on the user ’s AUT .
Step 3. Press “Next” for the next step (below). The 3653 or 3753LF Calibration Kits contain a disk with calibration data. The data has to be installed from the MS462C front panel. T o do so, place the floppy disk from the kit into the MS462XC disk drive.
Step 6. Press “OK” for the next step (below). Connect the Short to T est Port 1 and the Open to T est Port 2. Step 7. Press “OK” for the next step (below).
Step 8. Press “OK” to complete the S Parameters calibration (below). S-PARAMETERS CAL OPERATIONS, CALIBRATION 4-14 ME 7840A OMM.
4-9 CAL FILE SETUP The “D_Cal File Setup.txt” file provides prompts for setting up One-tone power sweep, IMD, T wo-T one Power Sweep, and Harmonic specification file. The prompts cause the Scorpion to be placed into a state where it is ready to make calibrated measurements on the user ’s AUT .
Step 3. Press “Next” for the next prompt (below). The 3653 or 3753LF Calibration Kits contain a disk with calibration data. The data has to be installed from the MS462C front panel. T o do so, place the floppy disk from the kit into the MS462XC disk drive.
Step 5. Press “OK” to continue to the IMD cal file setup prompt (be - low). Follow the prompt and connect a throughline between T est Ports 1 and 2 on the MS4782X T est Set.
Step 6. Press “Next” to begin the Power Sweep cal file setup (below). CAL FILE SETUP OPERATIONS, CALIBRATION 4-18 ME 7840A OMM.
Step 7. Press “Next” to perform Harmonic Cal File Setup calibration (below). Step 8. Press “Next” to end the calibration and return to the main screen.
Chapter 5 Operations, Measur ement 5-1 INTRODUCTION This chapter describes the five measurements available with the ME7840A software: S-Parameters, Power Sweep, IMD (intermodulation distortion), Harmonics, and Hot S 22 . 5-2 OPERA TION, GENERAL Refer to Chapter 3 for general operation and setup of the ME7840A.
n C5, Hot S 22 ¾ “Hots22_1.cal” Step 5. Select appropriate file “Open” (below). Calibration(s) Not Completed Sometimes users may wish to run a measurement using default settings, that is, without spending the time required to calibrate. The procedure below gives instructions.
n D1, S-Parameters and Hot S 22 ü Points = 201 ü Start Frequency = 800 MHz ü Stop Frequency = 2400 MHz ü Input Powe r=0d B n D2, Power Sweep (2 tone power sweep) ü Main T one = 950 MHz ü Offset .
5-5 S-P ARAMETER TESTS: S 21 ,S 11 ,S 22 ,S 12 , ALL This test measures the scattering parameters (S-parameters). The test module comprises six tests: S 11 ,S 12 ,S 21 ,S 22 , and ALL. (The K Factors test is described in paragraph 5-6.) In each case, the measurement screens are the similar .
n Select Start T est: Observe that the test screen (Figure 5-1) appears. Button Panel Options: q Print: Prints a copy of the screen graphic to a printer . q W rite Data: T wo data files are written to the C:Program FilesPatsDatafiles folder; the file name will have a time stamp.
q Change Params: Returns to User Input screen. q Autoscale Checkbox: T urns autoscale on or off. Autoscale automatically scales the mea - surement results. q Reset/Zoom: Disabled for this test. q Max/Min: T ype in maximum and minimum display value. Use Rescale after changing val - ues.
5-6 S-P ARAMETER TEST : K F ACTOR This test describes the K Factors measurement. This measurement is described in Chapter 1, paragraph 1-10. Procedure. Prepare the ME7840A as shown in Chapter 3. Enter the appropriate test values in the displayed User Input screen.
n Select Start T est: Observe that the test screen (Figure 5-1) appears. Button Panel Options: q Print: Prints a copy of the screen graphic to a printer . q W rite Data: T wo data files are written to the C:Program FilesPatsDatafiles folder; the file name will have a time stamp.
q Change Params: Returns to User Input screen. q Autoscale Checkbox: T urns autoscale on or off. Autoscale automatically scales the mea - surement results. q Reset/Zoom: Disabled for this test. q Max/Min: T ype in maximum and minimum display value. Use Rescale after changing val - ues.
5-7 POWER SWEEP , TWO TONE This measurement module has three variations of possible Measurement T ypes: Power Sweep (single frequency), Multi Frequency Power Sweep, Gain and IMD. Single Frequency Power Sweep Procedure. Prepare the ME7840A as shown in Chapter 3.
n T est Set Setting: Byte value for setting test set attenuation and source switch (below). OPERATIONS, MEASUREMENT POWER SWEEP, TWO TONE ME7840A OMM 5-11 Internal Source V alue External Source V alue.
Select Start T est and observe that the test screen (Figure 5-3) appears. Button Panel Options: q Print: Prints a copy of the screen graphic to a printer . q W rite Data: Excel data is written to C:Pro - gram FilesPatsDatafiles - the file name will have a time stamp.
q Autoscale Checkbox: T urns autoscale on or off. Autoscale automatically scales the mea - surement results. q Reset/Zoom: Disabled for this test. q Max/Min: T ype in maximum and minimum display value. Use Rescale after changing val - ues. q Rescale: Rescales the measurement results.
Multiple Frequency Power Sweep Procedure. n Measurement T ype: Drop down options. Set to “Multi Freq Power Sweep ” for this test. n Main T one (MHz): CW Frequency setting for source 1.
n T est Set Setting: Byte value for setting test set attenuation and source switch (below). OPERATIONS, MEASUREMENT POWER SWEEP, TWO TONE ME7840A OMM 5-15 Internal Source V alue External Source V alue.
Select Start T est . Observe that the test screen (Fig - ure 5-4) appears. Button Panel Options: q Print: Prints a copy of the screen graphic to a printer . q W rite Data: Excel data is written to C:Pro - gram FilesPatsDatafiles - the file name will have a time stamp.
q Pause/Go: Stops data transfer from VNA to PC and places MS4623C in “Local” mode. q Return: Returns to the main P A TS screen. q Change Params: Returns to User Input screen. q Y1, Y2: Provides for rescaling the left or right axis. q Rescale: Rescales the measurement results.
Gain and IMD Power Sweep Procedure: n Measurement T ype: Drop down options. Set to “Gain and IMD ” for this test. n Main T one (MHz): CW Frequency setting for source 1.
n T est Set Setting: Byte value for setting test set attenuation and source switch (below). OPERATIONS, MEASUREMENT POWER SWEEP, TWO TONE ME7840A OMM 5-19 Internal Source V alue External Source V alue.
Select Start T est . Observe that the test screen (Fig - ure 5-5) appears. Button Panel Options: q Print: Prints a copy of the screen graphic to a printer . q W rite Data: Excel data is written to C:Pro - gram FilesPatsDatafiles - the file name will have a time stamp.
q Return: Returns to the main P A TS screen. q Change Params: Returns to User Input screen. q Y1, Y2: Provides for rescaling the left or right axis. q Rescale: Rescales the measurement results. q Max/Min: T ype in maximum and minimum display value. Use Rescale after changing val - ues.
5-8 POWER SWEEP , ONE TONE This measurement module has three variations of possible Measurement T ypes: Power Sweep (single frequency), Multi Frequency Power Sweep, Gain and IMD. Single Frequency Power Sweep Procedure. Prepare the ME7840A as shown in Chapter 3.
n T est Set Setting: Byte value for setting test set attenuation and source switch (below). OPERATIONS, MEASUREMENT POWER SWEEP, ONE TONE ME7840A OMM 5-23 Internal Source V alue External Source V alue.
Select Start T est and observe that the test screen (Figure 5-3) appears. Button Panel Options: q Print: Prints a copy of the screen graphic to a printer . q W rite Data: Excel data is written to C:Pro - gram FilesPatsDatafiles - the file name will have a time stamp.
q Autoscale Checkbox: T urns autoscale on or off. Autoscale automatically scales the mea - surement results. q Max/Min: T ype in maximum and minimum display value. Use Rescale after changing val - ues. q Rescale: Rescales the measurement results. Markers Screen Options (left): q Markers slider: Moves marker between data points.
5-9 IMD This test measures inter-modulation distortion. Procedure Prepare the ME7840A as shown in Chapter 3. Enter the appropriate test values in the displayed User Input screen. The input fields are described below: n Measurement T ype: Already set to “IM” for IMD – input disabled.
Select Start T est . Observe that the test screen (Fig - ure 5-7) appears. Button Panel Options: q Print: Prints a copy of the screen graphic to a printer . q W rite Data: Excel data is written to C:Pro - gram FilesPatsDatafiles - the file name will have a time stamp.
q Return: Returns to the main P A TS screen. q Change Params: Returns to the User In - put screen. q Rescale: Rescales the measurement results. q Max/Min: T ype in maximum and minimum display value. Use Rescale after changing val - ues. q Autoscale Checkbox: T urns autoscale on or off.
5-10 HARMONICS The harmonics test measures and displays the harmonics in the device under test. Procedure Prepare the ME7840A as shown in Chapter 3. Enter the appropriate test values in the displayed User Input screen. The input fields are described below: n Measurement T ype: Already set to “HA” for Har - monics – input disabled.
Select Start T est and observe that the test screen (Figure 5-8) appears. Button Panel Options: q Print: Prints a copy of the screen graphic to a printer . q W rite Data: Excel data is written to C:Pro - gram FilesPatsDatafiles - the file name will have a time stamp.
q Change Params: Returns to User Input screen. q Autoscale Checkbox: T urns autoscale on or off. Autoscale automatically scales the mea - surement results. q Max/Min: T ype in maximum and minimum display value. Use Rescale after changing val - ues. q Rescale: Rescales the measurement results.
5-1 1 HOT S22 The output match of a power amplifier under excited conditions is critical information that has a strong bearing on efficiency , output power , stabil - ity , and often the economic viability of the design.
n T est Set Setting: Byte value for setting test set attenuation and source switch: The P A TS Hot S 22 measurement provides the following additional fea- tures: q Ability to vary the AUT input excitation power level (Source 2 of Scorpion, at Port 1) while observing the Hot S 22 response.
Select Start T est and observe that the test screen (Figure 5-9) appears. Button Panel Options: q Print: Prints a copy of the screen graphic to a printer . q W rite Data: Excel data is written to C:Pro - gram FilesPatsDatafiles - the file name will have a time stamp.
q Change Params: Returns to User Input screen. q Autoscale Checkbox: T urns autoscale on or off. Autoscale automatically scales the mea - surement results. q Reset/Zoom: Disabled for this test. q Max/Min: T ype in maximum and minimum display value. Use Rescale after changing val - ues.
Chapter 6 Performance V erification Pr ocedur e 6-1 INTRODUCTION The following are the specific tests that should be used to verify the per - formance of the Power Amplifier T est System (P A TS) q So.
6-4 SOURCE OUTPUT ACCURACY This test verifies the source output accuracy of the MS462XC. The test procedure uses the Power ALC V erification built-in function of the MS462XC Basic Measurement software. Setup: Step 1. Connect a GPIB cable between the power meter GPIB connec - tor and the MS462XC dedicated GPIB connector , as shown in Figure 6-1.
Step 4. Connect power sensor to MS462XC Port 1 and select ST ART VERIFICA TION softkey . Step 5. V erify that Source 1 passes this test. Step 6. Press the SELECT SOURCE soft key to select 2 Step 7. Connect power sensor to MS462XC Port 3 and select ST ART VERIFICA TION soft key .
RETURN RETURN Step 5. Press Display key and select: DISPLA Y MODE SINGLE CHANNEL RETURN Step 6. Press C h4 key and then Display key . Step 7. Select: GRAPH TYPE LOG MAGNITUDE Step 8. Press Ch 1 key and select LOG MAGNITUDE. T est Procedure: Insert the Calibration Component Coefficients disk into the MS462XC floppy disk drive.
Step 6. Connect SC5237 6 dB Offset T ermination to T est Port 1o f MS4782 T est Set. Record the measured value in T able 6-1 and verify the measured S 11 value is 6 ±0.4 dB. Remove SC5237 T ermination. Step 7. Connect SC5270 20 dB Offset T ermination to T est Port 1 of MS4782 T est Set.
6-6 SYSTEM DYNAMIC RANGE This test verifies the P A TS system dynamic range. T est Procedure: Step 1. Press Default key then 0 key of MS462XC to reset the system. Step 2. Press Seq key . Step 3. Select: TTL I/O. P ARALLEL OUT SETUP SET P ARALLEL OUT PORT (0-255) Step 4.
PERFORM CAL: 2 PORT CAL METHOD: ST ANDARD LINE TYPE: COAXIAL SELECT CALIBRA TION TYPE: TRANSMISSION FREQUENCY RESPONSE P A TH: FOR WARD P A TH (S 21 ) USE OF ISOLA TION IN CALIBRA TION: INCLUDE FREQUENCY RANGE: 800 MHz T O 2400 MHz SELECT CALIBRA TION DA T A POINTS: NORMAL DA T A POINTS: 401 POINTS TEST SIGNAL/POR T 1 POWER: 10 dBm Step 10.
6-7 RECEIVER DISPLA Y LINEARITY This test verifies the magnitude display linearity of the receiver . Setup: Step 1. Setup the equipment as shown above. Step 2. Allow the system to warm up for at least one hour . Step 3. Press Default key then 0 key . Step 4.
Step 9. T oggle C.W . MODE OFF soft key to C.W . MODE ON . Step 10. Change C.W . Frequency to 1 GHz. Step 1 1. Press Config key and select: DA T A POINTS POINTS DRA W IN C.W . – 51 POINT(S) Step 12. Press Av g key and select: SELECT I.F . BANDWIDTH I.
Step 25. Press Power key and select SOURCE 1 SETUP . Step 26. Set PORT 1 A TTN to 10 dB. Record the Power Meter Readout and the Marker 1 Readout to the table on next page. Repeat this step for other PORT 1 A TTN setting listed in the table. Step 27. V erify if the difference of the two measured values are within specifications (T able 6-2).
Chapter 7 Pr eamplifier Operations 7-1 INTRODUCTION This chapter describes the use of external preamplifiers to boost signal power at the input of an test amplifier . 7-2 USE OF EXTERNAL PREAMPLIFIERS External preamplifiers can be used to boost signal level at the input of the Amplifier Under T est (AUT).
an approximate source power (at the Scorpion Port 1, Port 3, or both). For tests involving power sweep, the MS7840A enables a linear power calibration over the desired power range (and the frequency range).
PREAMPLIFIER OPERATIONS USE OF EXTERNAL PREAMPLIFIERS ME7840A OMM 7-3 AUT POWER METER OPTIONAL SPECTRUM ANAL YZER SYSTEM CONTROLLER (PC) B2 RF1 B1 A1 A2 STEP A TTENUA TOR 70dB, 10dB/step POWER SUPPL Y.
USE OF EXTERNAL PREAMPLIFIERS PREAMPLIFIER OPERATIONS 7-4 ME 7840A OMM AUT POWER METER OPTIONAL SPECTRUM ANAL YZER SYSTEM CONTROLLER (PC) B2 RF1 B1 A1 A2 POWER SUPPL Y COMBINER RF2 -30dB -30dB N N N K.
Appendix A Calibration Specification Files A-1 INTRODUCTION This appendix describes the Calibration Specification Files that are used to specify calibrations that are performed when accessing “T ools,” “Run Calibration Procedures” in the P A TS software.
TECHNICAL DETAILS CAL SPECIFICATION FILES A-2 ME 7840A OMM I GENERAL 1. General Structure of file: 2. General syntax: a. Comma separates all fields. b. Spaces before or after a keyword or value in each field is acceptable. c. Place comma between last value and comment.
CAL SPECIFICATION FILES TECHNICAL DETAILS ME7840A OMM A-3 k. In each calibration specification/section, use the following structure: 3. Header: 4. “T ype” Keywords, Legal V alues: a. pow Power Level Calibration - linear cal - flat power cal - receiver cal b.
A-4 ME 7840A OMM TECHNICAL DETAILS CAL SPECIFICATION FILES II CALIBRA TION SPECIFICA TIONS, TYPES 1. pow (Power Level) Equipment Required: Power meter connected to Dedicated GPIB port Power sensor with appropriate frequency range Throughline Header Section Keywords ncal Number of calibration sequences of this type to run.
CAL SPECIFICATION FILES TECHNICAL DETAILS ME7840A OMM A-5 Detail Section Keywords CAL, 1 First calibration name, level Name of *.cal file to save when calibration sequence completes. f1 Start frequency in MHz for global calibration NOTE: Set a wide frequency range.
TECHNICAL DETAILS CAL SPECIFICATION FILES A-6 ME 7840A OMM 2. sp and Hot S 22 (S Parameters & Hot S 22 ) Header Section Keywords: ncal Number of calibration sequences of this type to run. npts Number of frequency points to use during the calibration sequence.
CAL SPECIFICATION FILES TECHNICAL DETAILS ME7840A OMM A-7 <pow2> For Hot S 22 only . Source 2 power setting. f1 Start frequency in MHz for global calibration NOTE: Set a wide frequency range. Miminum value is 10; ensure f1 is less than 2. f2 Stop frequency in MHz.
TECHNICAL DETAILS CAL SPECIFICATION FILES A-8 ME 7840A OMM 3. powsweep (Power Sweep - IMD mode or 2-tone mode): Header Section Keywords: ncal Number of calibration sequences of this type to run. npts NOTE: npts is IGNORED. Always uses 3, which refers to number of frequency values allowed (must be 3 in current software).
CAL SPECIFICATION FILES TECHNICAL DETAILS ME7840A OMM A-9 4. harm (Harmonics): Header Section Keywords: ncal Number of calibration sequences of this type to run. if IF bandwidth: Legal values are 10, 30, 100, 300, 1000, 3000, 10000, 30000 avgs Averages: (Optional).
TECHNICAL DETAILS CAL SPECIFICATION FILES A-10 ME 7840A OMM 5. imd (Imodulation Distortion): Header Section Keywords: ncal Number of calibration sequences of this type to run. pow Start power level for sweep: Set on for Source 1. if IF bandwidth: Legal values are 10, 30, 100, 300, 1000, 3000, 10000, 30000 avgs Averages: (Optional).
A-5 POWER LEVE.TXT The Power Level.txt file is shown in Figure A-1 A-6 CAL FILES SETUP .TXT The Cal Files Setup.txt file is shown in Figure A-2. CAL SPECIFICATION FILES POWER LEVE.
CAL FILES SETUP.TXT CAL SPECIFICATION FILES A-12 ME 7840A OMM ndut,1, //Number of DUTs type,powsweep type,harm type,imd POWSWEEP_START ncal,1, //Number of Power Sweep calibrations npts,3, //Number of .
A-7 HOT S 22 .TXT The HotS 22 .txt file is shown in Figure A-3. CAL SPECIFICATION FILES HOT S 22 .TXT ME7840A OMM A-13 ndut,1, //Number of DUTs type,sp, //S Parameter calibration SP_START ncal,1, //Nu.
A-8 S-P ARAMETERS. TXT The S-Parameters.txt file is shown in Figure A-4. S-PARAMETERS. TXT CAL SPECIFICATION FILES A-14 ME 7840A OMM ndut,1, //Number of DUTs type,sp, //S Parameter calibration SP_STAR.
Index ! Cal Files Setup Calibration Specification File . A-12 A ADAPTIVE P STOP ................1 - 9 C CAL FILE SETUP .............. 4-15 - 19 CAL FILES SETUP .TXT ..........A - 1 1 - 1 2 collateral functions ................3 - 4 COLLA TERAL FUNCTIONS .
RETURN LOSS CONFIDENCE TEST ....6 - 3 - 5 S SCOPE OF THIS MANUAL ............1 - 1 SERIAL NUMBER ................1 - 2 SER VICE CENTERS ..............2 - 8 - 9 Single Frequency Power Sweep ...... 5-10,5-22 Software Organization ...............3 - 4 SOFTW ARE STRUCTURE .
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