Chapter 3 3-45
Functional Testing
Second Harmonic Spurious Responses
Procedure
1. Connect the equipment as shown in Figure 3-6.
2. Set the synthesized sweeper controls as follows:
Frequency, 40 MHz
Amplitude, –10 dBm (50 Ω Input only)
Amplitude, –4.3 dBm (75 Ω Input only)
NOTE 75 Ω Input only. Connect the minimum loss adapter between the low
pass filter and 75 Ω Input.
3. Press
System, Power On/Preset, Preset (Factory), Preset on the
analyzer. Wait for the preset routine to finish.
Set the analyzer by pressing the following keys:
FREQUENCY, 40 MHz
SPAN, 1 MHz
AMPLITUDE, –10 dBm (50 Ω Input only)
AMPLITUDE, 44 dBmV (75 Ω Input only)
Attenuation (Man), 10 dB
BW/Avg, 30 kHz
4. Adjust the synthesized sweeper amplitude to place the peak of the
signal at the reference level.
5. Set the analyzer by pressing the following keys:
SPAN, 50 kHz
BW/Avg, 1 kHz
Video BW Auto Man, 100 Hz
6. Wait for two sweeps to finish, then press the following analyzer keys:
Peak Search
Mkr →
Mkr → CF Step
Marker, Delta
FREQUENCY
7. Press the ⇑ key on the analyzer to step to the second harmonic (at
80 MHz). Press
Peak Search. The marker delta amplitude reading
should be less than the Maximum value listed in the Test Limits
Table.
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