156 Chapter2
Making Adjustments
25. Checking the Absolute Amplitude Accuracy for Option 050
Frequency Response Input Attenuator 40 dB
30.On the analyzer, press the following keys.
AMPLITUDE, ATTEN AUTO MAN, 40, dB
AMPLITUDE, 10, +dBm
31.Set the FREQUENCY of the analyzer to the measurement frequency
shown in Table 2-14.
32.On the synthesized sweeper, press CW, then set the frequency to the
same measurement frequency as the analyzer is set in the previous
step.
33.On the analyzer, press
PEAK SEARCH.
34.On the synthesized sweeper, press POWER LEVEL and adjust the
amplitude so the analyzer marker amplitude reads +5 dBm
±0.05 dB.
35.Set the power sensor cal factor (for frequency being measured) on
the measuring receiver, then record the measuring receiver power
reading in Table 2-14.
36.Repeat step 31 to step 35 for frequencies of 881 MHz, 836 MHz, and
818 MHz. Record the results in Table 2-14.
Table 2-14 Frequency Response Attenuator 40 dB
Synthesized
SweeperFrequency
(MHz)
Measuring Receiver
Min (dBm) Reading (dBm) Max (dBm)
948 +4.0 _________________ +6.0
881 +4.0 _________________ +6.0
836 +4.0 _________________ +6.0
818 +4.0 _________________ +6.0
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