HP 3562A Service Manual page 360

MOD E L 3 562A
TRH
TRIG1 @
TRIG2@
TRIGGER
T R I GRO
The system bus consists of the fol l owing signals:
A1 L to A23L . . . . . . . . . . system add ress bus
DOL to D1 5 L . . . . . . . . . system data b u s
ASL . . . . . . . . . . . . . . . . . address strobe
U D S L . . . . . . . . . . . . . . . upper data strobe
L D S L . . . . . . . . . . . . . . . lower data strobe
W R I T E L . . . . . . . . . . . . . read/write
DT AC K L . . . . . . . . . . . . data transfer ack nowledge
V I O L . . . . . . . . . . . . . . . valid I /O add ress
E N B L L . . . . . . . . . . . . . . enable
VMAL . . . . . . . . . . . . . . val id memory add ress
RE MTG L . . . . . . . . . . . . remote trigger
R E S ET L . . . . . . . . . . . . . reset
I RQT2 L to I RQT6L . . . . i nterrupt req uest l i nes
VPAL . . . . . . . . . . . . . . . val id peripheral add ress
TRACK A N D H O LD
(A32, A34 T P609)
This s ignal is used by the A32 ADC 1 and the A34 ADC
the ADC control ler to the ADC track and hold switc h. When both
assem b l ies are i n stal led, the TRH signal from ADC 2 contro ls the track
and hold switch on ADC 1 .
ANALOG T R I G G E R CHA N N E L 1
ANALOG T R I G G E R C H AN N E L 2
(A32, A34 TP303)
Cond itioned analog signal from A32, A34 Analog D ig ital Co nve rters
to the A31 Trigger assembly.
TR I G G E R
This s ignal is from the A6 Digital Fi lter Control ler to the A1 5 Keyboard.
TR I G G E R contro l s the front panel trigger L E D as fol lows:
Meas u rement Mode
Free ru n
Triggered
Time Captu re
TR I G G E R S I G NA L
(A31 TP3)
The trigger signal from the A31 Trigger assem bly to the A 1 D igital
Source and the A6 Dig ital Fi lter Control ler. T h i s signal is asserted
whenever the i n put has exceeded the trigger leve l . T R I G RO i s u sed
by the d igital f i l ter to set the T R I G G E R s i g n a l .
Meas u r i n g
off
L E D off L E D o n
F l ash L E D when F l ash L E D when
trigge r occ u rs
i n put exceeds
trigger l evel
F l ash L E D when
L E D off
trigger occu rs
C I RC U I T D E SCRI PT I O N S
1.
T R H is f rom
Meas u r i n g
o n
. = :;- - ... �-
6-1 4 5
. . -.