Chapter 3 3-35
Functional Testing
Reference Level Accuracy
Linear Mode Procedure
1. Set the power level on the synthesized sweeper to –30 dBm.
2. Set the analyzer by pressing the following keys:
Sweep, Sweep (Cont)
AMPLITUDE, –30 dBm (50 Ω Input)
AMPLITUDE, +21.76 dBmV (75 Ω Input)
Scale Type (Lin)
AMPLITUDE, More 1 of 2, Amptd Units, dBm (50 Ω Input)
AMPLITUDE, More 1 of 2, Amptd Units, dBmV (75 Ω Input)
Marker, Off
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 3-5 on page 3-36.
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.
Table 3-4
Analyzer
Reference Level
Synthesized
Sweeper Amplitude
(dBm)
Minimum
(dB)
Analyzer
Marker ∆
Amplitude
(dB)
Maximum
(dB)
dBm dBmV
–30 21.76 Reference + _____ 0 (Reference) 0 (Reference) 0 (Reference)
–20 31.76 Reference + (10 dB) 8.60 11.40
–10 41.76 Reference + (20 dB) 18.60 21.40
–40 11.76 Reference + (–10 dB) –11.40 –8.60
–50 1.76 Reference + (–20 dB) –21.40 –18.60
–60 – 8.24 Reference + (–30 dB) –31.40 –28.60
–70 –18.24 Reference + (–40 dB) –42.0 –38.0
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