Agilent-technologies N3970A Manual de usuario descargar pdf (Pagina 18)

N3970A UM-1

■ PO W E R ME T E R OP E R AT I O N

After instrument turn on, the meter will be calibrated at the last

used λ. To change parameters, push POWER METER, then:

To select a calibrated λ, push +/-. λis displayed on the top right

side of the display.

To display relative power, push ABS/REL. The display will

show dB R.

To store a new reference, push SET REFfor 3 seconds.

To display the stored reference value, keep ABS/REL depressed.

To change the dBm display between linear and log, access the

hidden keypad and push dBm/W.

If the meter detects a modulated signal, the display will change

to show the actual measured modulation frequency in Hz,

and if a standard tone is detected ( eg 270 Hz, 1 KHz,

2 KHz ), a buzzer will sound. This is useful for fiber

identification and signalling. The meter can also be used to

check the actual modulation frequency of test sources.

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Agilent-technologies N3970A Manual de usuario Pagina 18