HP 3562A Service Manual page 138

ADJ U STME NTS
Instrument power sho uld alwa ys be turned off before any boards
are removed or installed. Failing to do so causes circuit failure in
Proced u re:
most cases.
Disconnect the l i ne power cord from the rear panel of the H P
Remove the ADC board to be adjusted and place it on the extender board.
1 .
Recon nect the l ine power cord and turn the power switch ON.
2.
4. Connect
3.
Set the freq uency synthes izer for a
A32T P400
frequency synthesizer to
5 .
Connect the scope to
Configure the scope for
geri ng H F rejection.
6.
7. Press the fol lowing keys in the order given:
PRES ET
RA N G E
(if sti ll in "second pass on ly" from previous adjustment, beeper
SPCL FCTN
retu rn to normal two pass operation)
Pressing the beeper key toggles the beeper between on and off.
It does not matter whether the beeper is turned on or off as long
as the keys are pressed in the order specified. If beeper commands
have been activated, the instru ment must be reset before it can
make measurements. This is requ ired because the beeper com­
mands configure internal circu its for special tests which do not
Three traces shou ld now appear on the scope d isplay as shown in figure
allow accurate meas urements to be made.
straight, horizontal line in the upper half of the display,
the lower half of the display, and
B .
that may appear as either a straight or triangu lar l ine. The fol lowing adjustments flat­
ten this last signal and center it in the clean triangu lar signal.
3-1 0
CAUTION
to a ground test poi nt.
mVp-p triangle signal at
through the adapter cable.
BOO
using the
A32J 200
mV/d iv, ms/d iv, dc coupli ng, BW l i m iting on, and trig­
A32TP405 1 0 :1
1 5 1 .5
. . . . R E S E T
. . . . . . dBVrms
. . . . B E E PE R O N/O FF
. . . . 7 .
NOTf
a "noisy" signal i n the lower half of the display
3)
3562A.
Hz. Con nect the
200
probe. use the capacitive load.
Do not
E NT E R (D ither off)
. . - 6 6 . .
a c lean triangle wave in
2)
MOD E L
3562
enter w i l l
- 68
a
3-1 0; 1 )