HP 8340b

Table
£-1.
Motherboard
Wiring
List
Mnemonic
SRD BIAS
3RD BIAS CONT
SRQ
STAT10
SW1
SW2
SUM
COIL
+
SYTM COIL
-
SYTM
GND
SYTMDB
SYTMDC
SYTMHTR
SYTMRES
SYTM TEMP
SYTMTHRM
TCREF
THERM 1
THERM2
TYOKP
VCOMP
VSWP
WBAND
WCDAC
WLEVEL
WMOD
WPDAC
WRDAC
Description
STEP
RECOVERY DIODE BIAS
STEP
RECOVERY DIODE BIAS CONTROL
IEEE 488
SERVICE REQUEST
(SRQ)
STATUS
WORD INPUT BIT 10
PLL1
15-30
MHZ
ON/OFF
CONTROL
PLL1 15 TO
.3
MHZ/3-6
MHZ CONTROL
POSITIVE INPUT TO SYTM
COIL
NEGATIVE INPUT TO SYTEM COIL
SYTM
GROUND
SYTM DRIVE TRANSISTSOR
BASE
SYTM
DRIVE
TRANSISTOR COLLECTOR
REGULATOR HEATER DRIVE TO SYTM
SYTM CURRENT
SENSE FEED
BACK
SUM
TEMPERATURE
COIL
TEMP FEED BACK THERMISTOR IN SYTM
ALC
TEMP
COMPENSATED REFERENCE
LOW BAND DETECTOR THERMISTOR
LOW
BAND
DETECTOR THERMISTOR
TRIGGER YO KICK PULSE
YO DELAY COMPENSATION
VOLTAGE
YO SWEEP RAMP
BAND
INFO
I/O
STROBE
(10,
R2:)
DELAY COMPENSATION DAC DATA
STROBE
(5,
R3:)
ALC REFERENCE DAC
DATA
STROBE
(10,
R1:)
MODULATION DATA STROBE
(10,
RO:)
PRE-TUNE DAC DATA STROBE
(3,
R2:)
RESET DAC DATA STROBE
(1,
R2:)
Type
ANALOG
DIGITAL
DIGITAL
DIGITAL
DIGITAL
DIGITAL
ANALOG
ANALOG
GROUND
ANALOG
ANALOG
ANALOG
ANALOG
ANALOG
ANALOG
ANALOG
ANALOG
ANALOG
DIGITAL
ANALOG
ANALOG
DIGITAL
DIGITAL
DIGITAL
DIGITAL
DIGITAL
DIGITAL
Levels
-10V/2KTO
-I-5V
0 TO
-5
LEVELED
TTL
TTL
(LOW
TRUE)
TTL
TTL
-40V
TO
-25V
-40V
0V
-22
TO
-39
-6
TO
-6V
0 TO
+20V
-.9VLOWBNDCW
100
mv/c°
APPROX
-5V
-.2V/dBOV=OdBM
-1V
TO
-8V
-10V
TTL
(LOW TRUE)
-26
MHZ/VOLT
0V
TO 10V/SWEEP
TTL
(LOW
TRUE)
TTL
(LOW
TRUE)
TTL
(LOW
TRUE)
TTL
(LOW
TRUE)
TTL
(LOW TRUE)
TTL
(LOW TRUE)
E-20
Motherboard
Wiring
List
HP
8340B/41B