Frequency Span; Db/Div; Second Crystal Stage Adjustment - HP 3585A Service Manual

Backdating
f. Adjust A 1 2L4 so that the trace approximates a straight, horizontal line. (Figure 7-3 .)
g. Set the -hp- 3585A to:
A-B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . off
FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50kHz
dB/DIV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0dB
h . Adjust A 1 2C24 so that the trace is symmetrical about the marker. (See Figure 7-4.)
7· 1 7. Third LC Stage Adjustment (A1 2: L5 and R 1 5)
a. Set the -hp- 3585A to:
SWEEP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cont
RES BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l kHz
FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 .3kHz
dB/DIV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I dB
A-B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . on
b. Adjust A 1 2L5 so that the trace approximates a straight, horizontal line. (See Figure
7-3 .)
c. Set the -hp- 3585A to:
A-B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . off
RES BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30kHz
OFFSET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . on
ENTER OFFSET
RES BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l kHz
d. Adjust A 1 2R 1 5 for a .OOdB marker amplitude.
e. DO NOT TURN POWER OFF. Remove the A- 1 2 Board and PC Extender. Install the
A- 12 board into the card nest.
7· 1 8. Second Crystal Stage Adjustment (A· 1 1 : L7, C39, and L8)
a. DO NOT TURN POWER OFF. Place the A-l l Board on a PC Extender.
b. Place jumper AI I J4 to the "T" position.
I f the B trace has been lost or altered, repeat the Preliminary Ad­
justment procedures to re-establish the re ference trace.
c. Check that the B trace is still intact.
7-8
(allow one complete sweep)
NOTE
Scam by ARTEK MEDIA =>
Model 3585A