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22. Modulation Generator Flatness (Option 002)
Description and Procedure
he internal modulation generator is set up for FM operation. A 100 kHz
rate, measured at the AM/FM OU PU connector, is used as the reference
amplitude. A calibration constant is adjusted so the AM/FM output signal is
the same amplitude as for a 1 MHz FM rate.
1. Connect the equipment as shown in Figure 3-39. Preset all instruments and
let them warm up for at least one hour.
Figure 3-39. Modulation Generator Flatness Adjustment etup
Digitizing Oscilloscope
2. On the synthesizer, press:
FM Menu FM On/Off Int
MOD
5
Internal FM Rate
Monitor Menu ModOut On/Off FM
PRIOR
5
3. On the oscilloscope, set:
Channel 1
Display
Volts/Division
Input Coupling
Input Impedance
3-120 Adjustments
Modulation Generator Flatness
All manuals and user guides at all-guides.com
Equipment
(asterisk on)
Internal FM Dev
100
kHz
5
5
On
210 mV
dc
50
HP 54111D
8
MHz
5
5
HP 8360
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