HP 3562A Service Manual page 456

S E RV I C E
B.
Subblock Verification Tests
The d igital sou rce performs several f u n ctions i n c l u d ing generating band-l im ited random
noise, interfac ing the local osc i l l ator with the analog sou rce, sychron izing trigger operations,
and i nterfac ing the front end asse m b l ies ( i n puts, ADCs, trigger, and analog sou rce) with
the A2 System C P U . Most f u n ctions use only a few of the DS sub b locks. To isolate the
fai l u re to a s u b b l ock, use tab le A1 -3 after perform ing the fol lowing steps:
1 . Connect the front panel sou rce output to channel 1 .
2 . Con nect the rear panel SYN C O U T output to c hannel 2 .
3. Press the HP 3562A keys as fo l lows:
PRESET
RA N G E
SO U RCE . . . .
MEAS
D I S P
SCA LE
Refer to figu re A 1 -1 to verify resu It.
The free-run mode is used for most of the following waveforms.
This is done to isolate failing functions to a subblock. When the
trigger mode is not used, the waveforms move around on the
display. The trigger mode is verified in step
8-6
R E S E T
5.6 V
. S O U RC E
.
L E V E L . . . . . . 5 V
F I X E D
S I N E . . . . . . 1 k H z
FI LTRD
I N PUT
Y F I XD
SCA L E
NOTE
T I M E
R E C 1
6, - 6 V
7.
MOD E L 3562A