6-15
6.3 Performance Tests
(5) Test procedures: Power meter (IF Level Meter) measurement accu-
racy
Step Procedure
“Linearity measurement”
1. Set the MT8801C as follows:
RF Input/Output: Main Set it on the Instrument Setup screen.
Power Meter Method: IF Level Meter Set it on the Setup TX Measure Parameter screen.
Using Specification: IS-95A Set it on the Setup Common Parameter screen.
CDMA Channel: 340 Ch Set it on the Setup Common Parameter screen.
2. Display the Power Meter screen.
3. Configure the setup 1 measurement system.
4. Set the measurement frequency for the MT8801C and the signal generator. Set the level (+10 dBm)
for the signal generator and set 0 dB for the receiver for calibration.
5. Execute “Internal OSC Calibration” and “Adjust Range” of MT8801C.
6. Execute “Measure Single” of MT8801C to read and record the measurement result.
7. Set the signal generator level at –10 dB, read the measurement result (P1) after the “Measure
Single” sweep, and read the calibrated value (P0) of the receiver for calibration.
8. Calculate the measurement accuracy (P1 – P0) and check whether the result is within the
specification value.
9. Change the signal generator level from –20 to –40 dB at the 10-dB interval and perform the
measurement as same as the step 8.
10. Repeat the above measurement steps 4 to 10 for every measurement frequencies.
“Internal OSC Calibration accuracy measurement”
11. Configure the setup 2 measurement system.
12. Set the attenuation quantity of programmable attenuator at 0 dB.
13. Perform the setting as same as the step 1.
14. Calibrate the output level (–10 dBm) of signal generator using the power meter.
15. Set the calibrated +10 dBm for the signal generator and execute “Internal OSC Calibration” and
“Adjust Range” of MT8801C.
16. Read the measurement result of MT8801C after the “Measure Single” sweep and check whether the
result is within the specification value.
17. Perform the similar measurement with the calibrated 0 dBm and –10 dBm setting level of signal
generator.
18. Repeat the above measurement steps 15 to 17 for every measurement frequencies.
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