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Model 5501A
Circuit Diagrams
Input
XA7-A,l
XA7-C,3
XA7-F
XA7-H
I
XA7-J,8
I
XA7-K
I
I
XA7-9
Tat
Signal Name
GND
+5v
-1 5V
L I MON
PZT MON
LASER
CATHODE
+ I
5V
R E F OK
RETUNE
CLAMP
LASER
CURRENT
ERROR
RETUNE
FAILURE
RETUNE
RETUNE
CMD
R E F
OK
e 7-6. A7 Control Board Assembly Signal List
Function
- -
Ground Reference
Provides 5501A with
+5
volts operating
power
-15 volts operating power for Control
Board
Laser Current Sample output
PZT voltage sample input
Laser Cathode voltage sample input
+I5 volts operating power for Control
Board
Active low signal input indicating
Laser is properly tuned.
Activates clamping switch that forces
Laser tube to operate on proper tuning
mode (f,)
Active high signal indicating Laser
Tube current is not within minimum
and maximum limits
Active high signal indicating any or
all of the following conditions:
1. Laser Tube current out of
specifications
2. PZT voltage out of specifications
3. Retune/check cycle in process
Active high indicating failure of
the Retune/Check cycle
Active high signal indicating
P n
tuning/check cycle is in process
Active low input signal that initiates
retunekheck cycle
Active low output signal indicating
Laser i s properly tuned
Source
Destination
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