HP 8340b - Page 225

Table
E-l.
Motherboard
Wiring List
Mnemonic
LRETRACE
LRSP
LSBY
LSPLD
LSSP
LSRQ
LSTEPUP
LSTP
LUNLVL
LVLCOR
LVLREF
LVSX
LYOKICK
LYSP
MKR RMP
MOD RTN
MODHI
MODLO
MODLVL
MUTE
M1
M2
M3
M4
M5
Description
RETRACE
RESET SWEEP CONTROL
STANDBY CONTROL
SWEEP L
E..D.
CONTROL
OFF/ON
STEP SWEEP
SERVICE REQUEST
STEP UP FOR EXTERNAL FOOT SWITCH
PROCESSOR
STOPPED
INSTRUMENT
UNLEVELED
LEVELING CORRECTION
A
L.C
LEVEL REFERENCE
DISABLE YO SWEEPS
YO SWEEP
SWEEP RAMP TO MARKER BANDCROSS BOARD
ALC MODULATORS GROUND RETURN
HIGH BAND
MODULATOR
DRIVE
LOW BAND
MODULATOR
DRIVE
MODULATOR LEVEL
PLOTTER MUTE CONTROL
M NUMBER TO
M/N
OSCILLATOR BIT
1
M NUMBER TO
M/N
OSCILLATOR BIT 2
M
NUMBER
TO
M/N
OSCILLATOR BIT 3
M NUMBER
TO
M/N
OSCILLATOR BIT 4
M NUMBER TO
M/N
OSCILLATOR BIT
5
Type
DIGITAL
DIGITAL
DIGITAL
DIGITAL
DIG OPEN
COLL
DIG OPEN
COLL
DIGITAL
DIGITAL
DIG OPEN
COLL
ANALOG
ANALOG
DIGITAL
DIGITAL
ANALOG
GROUND
ANALOG
ANALOG
ANALOG
DIGITAL
DIGITAL
DIGITAL
DIGITAL
DIGITAL
DIGITAL
Levels
TTL
(LOW TRUE)
TTL(LOW TRUE)
OVTO
+22V
TTL
TTL(LOW TRUE)
TTL(LOW TRUE)
TTL(LOW TRUE)
TTL(LOW TRUE)
TTL(LOW TRUE)
125dB/VOV=OdB
2V/dBOV=OdBm
TTL(LOW TRUE)
TTL(LOW TRUE)
0 TO lOV/SWEEP
0V
CURRENT SOURCE
CURRENT SOURCE
0 TO
-3
LEVELED
TTL (HIGH
TRUE)
TTL
(HIGH
TRUE)
TTL
(HIGH TRUE)
TTL (HIGH TRUE)
TTL (HIGH TRUE)
TTL
(HIGH TRUE)
E-14
Motherboard
Wiring
List
Change
5
HP 8340B/41B