168 Chapter2
Making Adjustments
27. Checking the Absolute Amplitude Accuracy for Option 051
Frequency Response Input Attenuator 20 dB
43.On the analyzer, press the following keys.
AMPLITUDE, ATTEN AUTO MAN, 20, dB
AMPLITUDE, 6, +dBm
44.Set the FREQUENCY of the analyzer to the measurement frequency
shown in Table 2-23.
45.On the synthesized sweeper, press CW and set the frequency to the
same measurement frequency as the analyzer is set in the previous
step.
46.On the analyzer, press
PEAK SEARCH.
47.On the sweeper, press POWER LEVEL and adjust the amplitude so
the analyzer marker amplitude reads +1 dBm ±0.05 dB.
48.Set the power sensor cal factor (for frequency being measured) on
the measuring receiver, then record the measuring receiver power
reading in Table 2-23.
49.Repeat step 44 to step 48 for frequencies of 1477 MHz, 1453 MHz,
and 1428 MHz. Record the results in Table 2-23. The results should
be within the limits shown.
Table 2-23 Frequency Response Attenuator 20 dB
Synthesized
SweeperFrequency
(MHz)
Measuring Receiver
Min (dBm) Reading (dBm) Max (dBm)
1501 +0.4 _________________ +1.6
1477 +0.4 _________________ +1.6
1453 +0.4 _________________ +1.6
1429 +0.4 _________________ +1.6
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