3-34 Chapter3
Functional Testing
Reference Level Accuracy
Log Mode Procedure
1. Connect the equipment as shown in Figure 3-4.
2. Press
PRESET on the synthesized sweeper. Set the synthesized
sweeper controls as follows:
CW, 50 MHz
Power Level, –30 dBm
3. Press System, Power On/Preset, Preset (Factory), Preset on the
analyzer, then wait for the preset routine to finish. Press
System,
Alignments, Auto Align, Off. Set the analyzer by pressing the following
keys:
FREQUENCY, 50 MHz
SPAN, 50 kHz
AMPLITUDE, –30 dBm (50 Ω Input only)
AMPLITUDE, 21.76 dBmV (75 Ω Input only)
Attenuation (Man), 5 dB
BW/Avg, Resolution BW Auto Man, 3 kHz
Video BW Auto Man, 30 Hz
4. Press Peak Search on the analyzer. 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 3-4
on page 3-35.
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.
5. Now that the reference has been established in step 4, adjust the
synthesized sweeper power level and the analyzer reference level
according to Table 3-4 on page 3-35. (The synthesized sweeper
output power and the analyzer’s reference level will be changed in
10 dB steps.)
6. On the analyzer, press
Single and wait for a sweep to finish. Press
Peak Search, Marker, Delta.
7. 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 3-4.
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