HP 8340b - Page 508

Table
E-l.
Motherboard Wiring
List
Mnemonic
Q2B
Q2E
Q3B
Q3C
Q3E
Q4B
Q4C
Q4E
REN
RFSWP
RGND
RPNLSWP
RPNLSWP
RTN
RSTAT
SIOA
SIOB
SPARE
1
SPARE
2
SRFBK
SRPWR
Description
TRANSISTOR Q2 BASE
TRANSISTOR
Q2
EMITTER
TRANSISTOR
Q3
BASE
TRANSISTOR Q3
COLLECTOR
TRANSISTOR
Q3 EMMITER
TRANSISTOR
04
BASE
TRANSISTOR
04
COLLECTOR
TRANSISTOR
04
EMITTER
IEEE
488
REMOTE ENABLE (REN)
SWEEP RAMP TO RF OUTPUT
SECTION
REFERENCE GROUND
REAR PANEL SWEEP OUTPUT
REAR PANEL SWEEP GROUND RETURN
READ
STATUS I/D
STROBE
(15,
R3:)
I/O
STROBE
(FIRST HALF
ADDRESSES)
I/O
STROBE
(SECOND
HALF
ADDRESSES)
DBO OUTPUT MISCELLANEOUS CONTROL
DB1
OUTPUT MISCELLANEOUS CONTROL
YO SENSE RESISTOR FEEDBACK
YO SENSE RESISTOR POWER
Type
ANALOG
ANALOG
ANALOG
ANALOG
ANALOG
ANALOG
ANALOG
ANALOG
DIGITAL
ANALOG
GROUND
ANALOG
GROUND
DIGITAL
DIGITAL
DIGITAL
DIGITAL
DIGITAL
ANALOG
ANALOG
Levels
TTL
(LOW
TRUE)
10V/SWEEP
0V
10V/SWEEP
0V
TTL
(LOW
TRUE)
TTL
(LOW
TRUE)
TTL (LOW
TRUE)
TTL
TTL
-5
TO
-17V
-5V
TO
-17V
E-18
Motherboard
Wiring
List HP 8340B/41B