HP 8340B Manual page 506

Tnb/e
E-l.
Motherboard Wiring List
Mnemonic
NDAC
NEG BLANK
NRFD
N1
N2
N2 TUNE
N2 TUNE RTN
N3
N4
N5
N6
PEN LIFT
PEN LIFT RTN
PH1
PH2
PINBIAS
PLSIN
PLSIN RTN
PMOD RTN
PRETUNE
PWR ON LED
Q1B
Q1E
Description
IEEE 488 NOT DATA ACCEPTED
(NDAC)
NEGATIVE BLANKING SIGNAL
IEEE 488 NOT READY FOR DATA
(NRFD)
N NUMBER TO
M/N OSCILLATOR BIT 1
N NUMBER TO M/N OSCILLATOR BIT 2
TUNING SIGNAL TO PLL2 VCO
GROUND RETURN
N NUMBER TO
M/N
OSCILLATOR BIT 3
N NUMBER TO
M/N
OSCILLATOR BIT 4
N NUMBER TO
M/N
OSCILLATOR BIT 5
N NUMBER TO M/N OSCILLATOR BIT 6
PLOTTER PEN LIFT
PLOTTER PEN LIFT GROUND RETURN
PLL1 PHASE DETECTOR OUTPUT
PLL1 PHASE DETECTOR OUTPUT
SYTM
P I.N. DIODE BIAS
EXTERNAL PULSE INPUT
EXTERNAL PULSE GROUND RETURN
PULSE MODULATOR DRIVE GROUND RETURN
YO PRETUNE
+5
Vac THROUGH CR) AND R1 TO DSI
TRANSISTOR 01 BASE
TRANSISTOR Q1 EMITTER
Type
DIGITAL
DIGITAL
DIGITAL
DIGITAL
DIGITAL
ANALOG
GROUND
DIGITAL
DIGITAL
DIGITAL
DIGITAL
OPEN COLLECTOR
GROUND
ANALOG
ANALOG
DIGITAL
DIGITAL
GROUND
GROUND
ANALOG
POWER SUPPLY
ANALOG
ANALOG
Levels
TTL
0,
-5V
TTL
TTL
TTL
OVTO
+7V
0V
TTL
TTL
TTL
TTL
CLAMP AT 56 V
0V
OVTO +5V
OVTO +5V
-4V
TO +12V
TTL
0V
0V
-2.5V/GHzOa2GHz
+
78V ANODE
-
ON
E-16 Motherboard Wiring List
HP 8340B/41B