PERFORMANCE TESTS
If the UUT fails this test after passing the high level accuracy test, problems with the
A21 Attenuator PCA or the A7 Relay Driver PCA are indicated.
It is convenient to use the UUT RF ON/OFF control when zeroing the power meter.
PROCEDURE:
1. Program the UUT to SPCL 909, 10 MHz, and -24 dBm.
2. Calibrate the power meter.
3. Zero the power meter.
4. Connect the power meter and power sensor to the UUT RF OUTPUT.
5. Measure the UUT output power (in dBm) with the power meter. The output
should agree with the programmed level within the requirement.
6. Repeat step 5 for levels of -30, -36, -42, -48, -54, -60, and -66 dBm.
7. Repeat steps 5 and 6 for frequencies of 14, 20, 40, 80, 160, 320, 550, 640, 700, 850,
950,
and
1024 MHz.
LOW-LEVEL ACCURACY TEST 4-8.
An RF spectrum analyzer and amplifier are used to verify the UUT level accuracy at
-137 dBm and at frequencies of 10, 14, 20, 40, 80, 160, 320, 550, 640, 700, 850, 950, and
1024 MHz.
REQUIREMENT:
Amplitude accuracy is:
< ±1.5 dB from 0.5 to 1024 MHz for level between -66 dBm and -117 dBm.
< ±3.0 dB from 0.5 to 1024 MHz for level between -117 dBm and -137 dBm.
TEST EQUIPMENT:
0.1 - to 1.1-GHz amplifier
50-dB attenuator
20-dB attenuator
RF spectrum analyzer
Power meter
Power sensor (low-level)
REMARKS:
This test, in conjunction with the mid-level accuracy and high-Level accuracy test,
verifies the overall level performance of the UUT.
If the UUT fails this test after passing the "High-Level Accuracy Test and the
"Mid-Level Accuracy Test" a problem in the A21 Attenuator PCA, the A7 Relay
Driver PCA, or a leak-around problem in the attenuator assembly is indicated. Check
for a broken feed-through filter or improper mechanical assembly, i.e., loose screws
and/or damaged or misplaced gaskets.
4-9
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