HP 3585A Service Manual page 151

Adjustments
h. Adjust A l 9C39 for a maximum marker amplitude reading. Adjust the REF LEVEL as
necessary to keep the marker within the graticule area. (See Figure 5-25 .)
1 .
Press the 3585A STORE A .... . B key.
j . Disconnect the synthesizer.
k . Connect the output of the Tracking Generator to a 50n termination. Connect the out­
put of the 50n termination to the A 1 7 1 1 connector. Set Tracking Generator output control
fully CCW.
1.
Set the 3585A controls for:
m. Move the marker to the peak of the trace and press MKR .... . CF.
n. Adjust A l 9C41 so that the displayed trace is symmetrical about the marker.
o. Using the STEP keys, start narrowing the FREQUENCY SPAN. As you narrow the
span the peak of the response will move to the left or the right. When this occurs, move the
marker to the peak of the response and press MKR .... . CF. continue narrowing the span until
a frequency span of 1 0Hz is reached.
p. Set the 3585A controls for:
q. Move the marker to the most positive point on the trace and press MKR .... . CF.
r. Adjust the Tracking Generator amplitude control so that the peak of the A trace and
the peak of the B trace are of equal amplitude.
5-36
REF -2� 0 dB.
1 dB/DI Y RANGE -25. 0 dBm
CENTER '350 000. 0 Hz
RBW 3 Hz YBW 1 0 Hz
Figure 5·25. IF Adjustment Display
FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . . . . . 50KHz
RES BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300Hz
SWEEP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . cont
dB/DIV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0dB
B TRACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OFF
dB/DIV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I dB
SWEEP TIME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.6sec
B Trace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . on
MANUAL 350 000. 0 Hz
-25. 70 dBm
SPAN 40 000 000. 0 Hz
ST 2 489 HR
#1
Model 3585A