ILX Lightwave LDC-3700C Series, Руководство пользователя, Страница: 31 / 176

O P E R A T I O N S
Connecting to the Laser Controller
04_09 LDC-3700C Series
15
C H A P T E R
2
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Connecting to the Laser Controller
When connecting your laser diode or any other sensitive devices to the
LDC-3700C Series Laser Diode Controller, ILX recommends that the instrument
be powered up and the LASER output be off (LASER MODE) ON LED unlit. In this
condition, a low impedance shunt is active across the output terminals. When
disconnecting devices, it is only necessary to turn the LASER Output off.
ILX also recommends that the connections to the LDC-3700C Series Laser Diode
Controller output be made using twisted wire pairs with an earth-grounded shield
(see Figure 2.1 on page 16). The output terminals of the instrument are left
floating relative to earth ground to suppress AC power-on/power-off transients that
may occur through an earth-ground path. If the output circuit is earth-grounded at
some point (such as through the laser package and mount), the user must be
careful to avoid multiple earth grounds in the circuit. Multiple earth grounds may
provide circuit paths that induce spurious currents in the photodiode feedback
circuit and output leads.