HP 8340B Manual page 510

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