Programming

Example Programs

Example 4. Measure WDM channel separation

This program measures the line separations on a WDM system. It mea- sures separation (delta) between power and wavelength of each line using commands from the CALCulate3 subsystem.

Refer to the introduction to this section for a description of each sub- routine that is contained in this program.

COM /Instrument/ @Mwm

ASSIGN @Mwm TO 720

DIM Key$[1]

ON ERROR GOTO Error_msg

Set_ese

PRINT USING "37A,33A";"Multi-Wavelength Meter Identity is : ";FNIdentity$

ON TIMEOUT 7,5 CALL Err_mngmt

Cmd_opc("*RST")

! Change to list-by-wavelength display

Cmd_opc(":CONF:ARR:POW:WAV")

! Trigger and wait for one measurement

Cmd_opc(":INIT")

Cmd_opc("*WAI")

! Turn on delta mode

Cmd_opc(":CALC3:DELT:WPOW:STAT ON")

! Set first wavelength as reference

Cmd_opc(":CALC3:DELT:REF:WAV MIN")

! Query number of data points

OUTPUT @Mwm;":CALC3:POIN?"

ENTER @Mwm USING "#,K";Nb_pt

ALLOCATE Delta_wl(1:Nb_pt)

ALLOCATE Delta_pwr(1:Nb_pt)

! Query wavelengths and powers

OUTPUT @Mwm;":CALC3:DATA? WAV"

ENTER @Mwm;Delta_wl(*)

OUTPUT @Mwm;":CALC3:DATA? POW"

ENTER @Mwm;Delta_pwr(*)

OFF TIMEOUT

FOR I=1 TO Nb_pt-1

PRINT USING "6A,2D,17A,M4D.3D,31A,S2D.2D,4A";"Line :";I;" wavelength is :

3-37

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Agilent Technologies Agilent 86120C manual Example 4. Measure WDM channel separation, Query number of data points
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