Vidia-Discrete
Troubleshooting • 55
Troubleshooting
Front-Panel Controls Won’t Work
If the front-panel controls aren’t working, the laser may be in remote
(computer-control) mode. Press the
Local
button on the front panel to
restore local control. If this does not restore control, cycle the power off
and then on.
Computer Control Doesn’t Work
If you are using the IEEE (GPIB) interface, make sure the laser is set to
the same device address as your software is requesting (see page 24).
If you are using the RS-232 interface, make sure the laser system is set
to the correct baud rate for your system (see page 25). If the baud rate is
correct, then it may be that the serial connector on the laser and on
your computer are both set to transmit on pin 2 (see page 63). If this is
the case, then using a null-modem adapter or a null-modem cable will
solve this problem.
Wavelength
Not S
et to the Start Wavelength
If the laser is in track mode (the
Track
button should be lit), it will not
tune to the start-scan wavelength. Press the
Track
button to turn track
mode off (the laser will switch to scan mode).
If the wavelength display does not match the wavelength measured by
an external wavelength meter, you can recalibrate the laser by adding a
wavelength offset using the computer interface. See page 38.
64X7 rev E.fm Page 55 Tuesday, April 3, 2001 4:16 PM
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