Model 8640B TM 9-4935-601-14-7&P
Table 4-2. Recommended Test Abridgements (2 of 3)
Para. Performance Test Alteration Remark
No.
4-28. Auxiliary Output Test Omit test. Auxiliary output a secondary function.
4-29. Output Leakage Test Omit step 5, The 400 MHz amplifier bandwidth is ade-
and use 400 MHz quate to check leakage over the output
amplifier to range of 0.5 to 512 MHz.
check to
512 MHz in step
4.
4-30. Internal Modulation Omit test. Exactness of modulation frequency not
Oscillator Test critical for most applications.
4-31. Internal Modulation Omit test. Excessive distortion will usually manifest
Oscillator Distortion itself in AM and FM distortion tests.
Test (Opt 001)
4-32. AM 3 dB Bandwidth Omit test. Accuracy at most often used frequencies
Test check in AM sensitivity test.
4-33. AM Distortion Test None
4-34. AM Sensitivity and Omit step 8, but A spot check of meter accuracy is usually
Accuracy Test check meter in adequate.
steps 1 to 7.
4-35. Peak Incidental Phase Omit test. Test requires access to inside of instrument.
Modulation Test Specification does not normally degrade
with time.
4-36. Pulse Modulation Test Omit steps 7 to Performance usually improves at the higher
9. frequencies.
4-37. Pulse On/Off Ratio Test Omit step 4. Performance usually improves at the lower
frequencies.
4-38. FM 3 dB Bandwidth Test Omit test. Accuracy at most often used frequencies
checked in FM Sensitivity test.
4-39. FM Distortion Test None.
4-40. FM Sensitivity and Accur- Omit steps 6 to A spot check of meter accuracy is usually
acy Test 9, but check adequate.
meter in steps
1 to 5.
4-41. Incidental AM Test Omit test. Incidental AM usually of secondary impor-
tance and FM sensitivity test will usually
show conditions that are out of specification
(i.e., the first order sidebands will be uneven).
4-86
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