Santec PEM-320, Руководство по эксплуатации

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5-2
PEM-320 Operation Manual
(5) Optical Power Unit Selector Key
Toggles the optical power measurement unit between mW and dBm. This key is also used when
setting the GPIB address and GPIB delimiter.
(6) Optical Input Connector
(7) GPIB Local Key / GPIB Address Change Key
a.
Pressing this key when GPIB remote operation is active returns control to the front panel.
b.
When this key is pressed for two seconds continuously the GPIB address and GPIB delimiter setting
mode is entered. The PER Display Panel (1) shows the GPIB address which flashes to indicate that
it can be changed using the Optical Power Unit Selector Key (5). Pressing the GPIB Local Key a
second time causes the GPIB delimeter setting shown in the Polarization Angle Display Panel (4) to
flash. Similarly, this can be changed using the Optical Power Unit Selector Key (5). Pressing the
GPIB Local Key a third time saves the displayed values and returns control to normal operation.
b.
Pressing this key when the power to the PEM-320 is first switched on sets the RS-232C delimiter to
CR (carriage return).
(8) GPIB Remote LED
Indicates GPIB remote operation is active. When active the front panel keys become inoperative.
To return control to the front panel press the GPIB Local Key (7).
(9) Calibration Key (CAL)
Not used (reserved for future use).
(10) Zero Key (Offset Cancel)
a. Enables compensation for the dark current of the photodetector. A cover should be placed over the
Optical Input Connector to prevent any stray light entering the unit before this button is pressed.
b. Pressing this key when the power to the PEM-320 is first switched on sets the RS-232C delimiter to
LF (line feed).
(11) Serial Interface (SIF) Connector
Used for RS-232C communication.
(12) Power On / Off Key Switch
Operated using the power switch key, this is used to switch the unit on and off.