Berkeley Nucleonics Corporation
2955 Kerner Blvd., San Rafael, CA 94901 ° Tel (415) 453 9955 ° Fax (415) 453 9956 ° www.berkeleynucleonics.com
5. Connect the laser diode to the output connector using the stripline.
6. Apply +24 VDC (±4 V) power to the module.
7. To set the output current prior to enabling the output, follow the procedure in
steps 8-11 below.
8. Ensure that the input gate signal is low (i.e., the input pulse generator is turned
off or is disabled).
9. Enable the PCO-6131 by pulling the enable input HIGH
10. Monitoring the voltage of the Output Current Setpoint Monitor (J2 Pin 6) with an
oscilloscope or Digital Voltmeter (DVM), set the output voltage to correspond to
the appropriate output current by adjusting the Current Set potentiometer. See
Section 5.7 for remote current set instructions.
11. When the current is set to the appropriate level, disable the output by pulling
the enable input LOW.
12. If the output current has not been set using the Output Current Setpoint
Monitor and the procedure detailed in steps 8-11 above, turn the Current Set
potentiometer fully counterclockwise (to set the output current to zero).
13. Enable the PCO-6131 by pulling the enable input HIGH
14. Turn on or enable the input gate signal.
15. If the output current has not been preset, slowly turn up the output current by
the Current Set potentiometer clockwise. The PCO-6131 should produce an
output pulse, with a pulse width and pulse recurrence frequency following that
of the incoming gate. The output pulse current may be monitor using the
optional PCA-9155. Scaling is 1000 A/V into 50 Ohms.
16. If there is no output from the PCO-6131, or the output is severely distorted,
disable the output, and turn OFF the +24 VDC power supply. Leave the PCO-
6131 connected to the DC input support power without voltage applied and
with all connectors in place for approximately one minute to bleed off the stored
energy, then disconnect the DC power to the unit and refer to the
Troubleshooting Section of this manual.
5.11 Power-Down Procedures
1. Disable the output.
2. Turn off the +24 VDC power supply.