164 Chapter2
Making Adjustments
27. Checking the Absolute Amplitude Accuracy for Option 051
Frequency Response Input Attenuator 20 dB
16.On the analyzer, press the following keys.
AMPLITUDE, ATTEN AUTO MAN, 20, dB
AMPLITUDE, 6, +dBm
17.Set the FREQUENCY of the analyzer to the measurement frequency
shown in Table 2-19.
18.On the synthesized sweeper, press CW and set the frequency to the
same measurement frequency as the analyzer is set in the previous
step.
19.On the analyzer, press
PEAK SEARCH.
20.On the sweeper, press POWER LEVEL and adjust the amplitude so
the analyzer marker amplitude reads +1 dBm ±0.05 dB.
21.Set the power sensor cal factor (for frequency being measured) on
the measuring receiver, then record the measuring receiver power
reading in Table 2-12.
22.Repeat step 17 to step 21 for frequencies of 948 MHz, 826 MHz, and
810 MHz. Record the results in Table 2-19. The results should be
within the limits shown.
Table 2-19 Frequency Response Attenuator 20 dB
Synthesized
SweeperFrequency
(MHz)
Measuring Receiver
Min (dBm) Reading (dBm) Max (dBm)
956 +0.4 _________________ +1.6
940 +0.4 _________________ +1.6
826 +0.4 _________________ +1.6
810 +0.4 _________________ +1.6
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