HP 8340b - 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