PERFORMANCE TESTS
4. Program the UUT frequency to 111.111111 MHz.
5. Program the UUT frequency step to 111.111111 MHz.
6. Verify that the reading on the frequency counter agrees with the UUT frequency ± 1
count as the frequency is stepped from 111.111111 to 999.999999 MHz.
HIGH-LEVEL ACCURACY TEST 4-6.
The output power is measured using a power meter at various frequencies. First the
step attenuator is set for zero attenuation; then each attenuator section is individually
programmed. Finally, the output level accuracy and attenuator section errors are
computed.
If a measuring receiver is available for level testing, proceed directly to the
"ALTERNATE-LEVEL ACCURACY TEST" procedure later in Section 4.
TEST EQUIPMENT:
• Power meter
• Power sensor (high-Level)
REQUIREMENT:
The output level accuracy, the attenuator section errors, and the sum of the attenuator
section errors at each test frequency are:
< ±1.5 dB from 0.5 to 1024 MHz
REMARKS:
If the UUT fails this performance test, it needs to be calibrated (Section 3) or repaired
(Section 6). Possible problem areas (if no power-on status codes are present) include
the A8 Output PCA, the A21 Attenuator PCA, or the A7 Relay Driver PCA.
The test frequencies of this procedure provide reasonable confidence of the amplitude
accuracy of the UUT. However, additional test frequencies may be included in this test.
This test verifies the high-level accuracy of the signal generator and verifies that the
amplitude correction factors for the individual attenuator sections are correct. This
test, in conjunction with the mid-level accuracy and low-level accuracy tests, verifies
the overall level performance of the UUT.
NOTE
To test attenuator sections 4 through 7, program the 6080A/AN Signal
Generator to -12 dBm, and key in
through , respectively.
PROCEDURE:
1. Calibrate and zero the power meter.
4-6
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