BNC 130 - Manual (Page 12)

12
OPERATING INFORMATION cont’d
The Quick Test procedure for the mainframe may be applied to the 106C/155/130 by selecting the Pulse
Mode and following the test sequence using the module's LIGHT OUT connector and an optical detector
in place of the mainframe's PULSE OUT. After Pulse Mode operation has been verified, the Impulse
Mode can be tested. This will require a sampling oscilloscope with a 1 GHz bandwidth. The impulse
should appear as a narrow pulse (approximately 400 ps). Its amplitude is roughly equal to that of a 0.3
mW, 5 ns pulse generated in the Pulse Mode. The CW and External Modulation Modes are similar.
These should produce continuous outputs. The output under External Modulation should follow any
waveform presented to the module's EXT MOD connector.
Default Settings
The following default settings for the 106C/153/130 module go into effect whenever a cold boot is
performed.
MODE:
Pulse
TRIG:
Single Cycle
(with other values set as follows)
Internal Trigger Rate = 1 kHz.
External Trigger Threshold = 0.00 V
Trigger Slope +
External Drive Threshold = 0.00 V
TIMING:
Delay = 1 µs
Width = 1 µs
Single Pulse
LEVEL:
Peak= l.000 mW
Baseline = 0.000 mW
External Modulation
CW=0.00 mW
GPIB/RS232: GPIB Address = 6
Baud Rate = 1200
Full Duplex
Remote Enabled
Front Panel Descriptions
LED INDICATORS
The 106C/155/130 module has two LED indicators on the front panel.
LASER ACTIVE will light when the instrument is in a state that can produce a light output.
LASER GUARD will light if the laser is being protected from an unsafe power output level, whenever the
Mode is changed and when the unit is first turned on. LASER GUARD will remain on if any unsafe circuit
conditions exist (e.g., excessive current driving the laser).