Chapter III – Subassemblies
3-29
C
996-0255 rev. b
3. CU601C rear panel interfaces
g) F1,F2
F1 and F2 are hi-side and return line fuse holders. The
fuses are 1A 250 V Bus Type GDC or equivalent.
h) J1 220 Vac
J1 is the ac line input which provides 220Vac power to the
internal linear open frame power supplies.
i) ext. Q-sw.
This BNC connector runs to J7 on the Accessory Driver
PCB. By taking the +5 Vdc found on this BNC, “low” will
fire the Q-switch.
j) J3 24 V
J3 is a BNC connector which provides 24 Vdc power to the
intracavity shutter and the HP70/HP71 on the laser
bench.
k) HP/SHTR
This D15 female connector provides control signals to
harmonic positioners #1 and #2 on the laser bench. The
connector also provides the control signals for the
intracavity shutter.
l) Q-switch A/B
Q-switch A output is a SMB type connector which pro-
vides the trigger pulse to the Q-switch board on the laser
bench and the “seeder trigger”. When the Q-switch board
receives this pulse the Q-switch opens. This pulse is
approximately 7µs long with a 5 ns risetime, and 12 V
amplitude. Q-switch B output is identical to Q-switch A
and can be used for laser pulse jitter measurement refer-
enced to the rising edge of this pulse, which has a 5 ns
risetime.
m) Externals -
This 9 pin “D” style connector runs to J1 on the Ext. Iso
PCB. Following the procedure for external triggering
listed in the System Operation section will allow external
control of your unit.
n) Laser interlock
Laser interlock is a D9 female connector. This connector
provides interface to the interlock’s signals from the laser
shutter, laser head temperature and dye laser (if used).
o) Cooling interlock
Cooling interlock is a D9 female connector. This connector
provides interface to the interlock’s signals from the
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