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Table 5-2. Most commonly used GPIB commands
Command
selected device clear
*RST
CENT 1550 nm
[SENSe:][WAVelength:]CENTer
SPAN, STARt, STOP
POW:RANG:LOW -45 dB
[SENSe:]POWer:[DC:]RANGE:LOWer
POW:RANG:AUTO OFF
[SENSe:]POWer:[DC:]RANGE:AUTO ON|OFF
SENS:POW:RANG:LOW -80 dB
[SENSe:]POWer:[DC:]RANGE:LOWer
DISP:TRAC:Y:RLEV-10 dBm
DISPlay:[WINDow[1]:]TRACe:Y[1,2]:[SCALe:]RLEVel
INIT
INITiate:[IMMediate]
INIT:NORM
INITiate:NORMalize
NORM:WAV:STAR 1520
[SENSe:]NORMalize:WAVelength:STARt
NORM:WAV:STOP 1520
[SENSe:]NORMalize:WAVelength:STOP
CAL:WAV:INT
CALibration:WAVelength:INTernal
SENS:SWE:SPE PREC
SENSe:SWEep:SPEed
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Summary for Experienced GPIB Programmers
Usage
This is not a text command - it is a GPIB hardware
message you should use to start off your applica-
tion.
The second thing you should do in your application
to return the instrument to a known state and set
single sweep mode.
Program the center wavelength, in nm.
Other wavelength oriented commands.
Tell the instrument the lowest power you expect to
see, causing the instrument to adjust its sensitivity.
Impacts sweep time.
Turn off auto-ranging - the automatic changing of
gain range during a sweep.
Sets the sensitivity. The sensitivity is the smallest
amplitude to be measured relative to the top grati-
cule of the display.
Set the display reference level - the maximum
power expected to display.
Take a sweep.
Performs a system normalization. Insure that a
patch cord is connected between the source output
and receiver input.
Sets the start of the normalization span.
Sets the end of the normalization span.
Performs a wavelength calibration using the inter-
nal absorption cell. If TLS settling time is less than
30 minutes, a Lambda Zero is also performed.
Selects the sweep mode. The trade-off is speed ver-
sus accuracy.
Remote Operation
5-9
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