Chapter 2 153
Making Adjustments
25. Checking the Absolute Amplitude Accuracy for Option 050
4. Press PRESET on the analyzer and wait for the preset to finish, then
press the following analyzer keys.
FREQUENCY, 818, MHz
SPAN, 400, kHz
BW, 100, kHz
VID BW AUTO MAN, 30, kHz
AMPLITUDE, 4, −dBm
ATTEN AUTO MAN, 10, dB
PEAK SEARCH
Log Fidelity
5. Set the power sensor cal factor for 818 MHz on the measuring
receiver.
6. On the synthesized sweeper, press POWER LEVEL and adjust the
output amplitude so that the analyzer marker amplitude reads
−9 dBm ±0.05 dB.
7. Record the measuring receiver power reading in Table 2-10.
8. Adjust the output amplitude of the sweeper for analyzer marker
amplitude readings of −14 dBm and −19 dBm.
9. Record the measuring receiver power readings in Table 2-10. The
readings should be within the limits shown.
Frequency Response Input Attenuator 10 dB
10.Set the frequency of the analyzer to the first measurement frequency
shown in Table 2-11.
11.On the synthesized sweeper, press CW and set the frequency to the
same measurement frequency as the analyzer is set in the previous
step.
12.On the analyzer, press
PEAK SEARCH.
Table 2-10 Log Fidelity
Analyzer
Marker Reading
(dBm)
Measuring Receiver
Min(dBm) Reading (dBm) Max(dBm)
−9 −9.7 _________________ −8.3
−14 −14.7 _________________ −13.3
−19 −19.7 _________________ −21.3
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