Agilent Technologies 8564EC Service Manual page 121

Manual Adjustment Procedures
9 . Demodulator Adjustment
5. Set the oscilloscope controls as follows:
6. On the spectrum analyzer, press
7. On the spectrum analyzer press:
8. A 1 kHz sine wave should be observed on the oscilloscope. Rotate the
9. Adjust A4C707 FM DEMOD for a maximum peak-to-peak response
10.Press
Figure 3-19 Demodulator Adjustment Locations
144
Channel 1 ......................................................................... on
Channel 2 ......................................................................... off
Channel 1 ..................................................... 50 mV/division
Channel 1 .......................................................................... ac
Channel 1 ................................................................. BW lim
Time base .................................................... 1.0 ms/division
Trigger .......................................................................... auto
Trigger source .................................................................... 1
Trigger level ................................................................. 0.0 V
follows:
Center frequency .................................................. 100 MHz
Span .......................................................................... 5 MHz
Reference level ....................................................... −10 dBm
Resolution bandwidth ............................................ 100 kHz
ZERO SPAN AUX CTRL
(OFF)
IF ADJ ON OFF
volume control to midrange.
volume knob on the front panel of the spectrum analyzer until the
amplitude of the 1 kHz signal is at about 150 mV (3 divisions on the
oscilloscope).
on the oscilloscope.
to turn the spectrum analyzer off. Disconnect the test
LINE
cable from A4C723.
, then set the controls as
PRESET
PEAK SEARCH
, ,
AM/FM DEMOD FM DEMOD ON OFF
, and
TRIG SWEEP CONT SGL
MARKER →CF SPAN
,
(ON) ,
CAL
(SGL). Set the
Chapter 3
,