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Chapter 4 149
ESA Functional Tests
Reference Level Accuracy
ESA Functional Tests
Linear Mode Procedure
1. Set the power level on the synthesized sweeper to –30 dBm by pressing Power Level,
–30,
dBm.
2.
Set the analyzer by pressing the following keys:
Sweep
, Sweep (Cont)
AMPLITUDE, More, Y Axis Units, dBm (50 Ω Input)
AMPLITUDE, –30, dBm (50 Ω Input)
AMPLITUDE, More, Y Axis Units, dBmV (75 Ω Input)
AMPLITUDE, +21.76, dBmV (75 Ω Input)
Scale Type (Lin)
3. Adjust the amplitude on the synthesized sweeper until the marker amplitude on the
analyzer reads –30 dBm +/– 0.10 dB. Enter the synthesized sweeper power level as the
Synthesized Sweeper Amplitude reference in Table 4-5 on page 150.
NOTE Under these analyzer conditions, the sweep time is 1.7 seconds. Therefore,
the marker amplitude updates are fairly slow when adjusting the synthesizer
output power.
4. Now that the reference has been established in step 4, adjust the synthesized sweeper
power level and the analyzer reference level according to Table 4-5 on page 150 (The
synthesized sweeper output power and the analyzer’s reference level will be changed in
10 dB steps.)
5. On the analyzer, press
Single, wait for a sweep to finish, and then press Peak Search,
Marker, Delta.
6. For each new synthesized sweeper power level and analyzer reference level change,
press the following keys on the analyzer:
Single
Peak Search
Record the Analyzer Marker Amplitude reading in Table 4-5