Agilent Technologies E6380-90073 Manuale Utente

GPIB Command Dictionary

These commands match/query the polarity of the encoded signal being 
analyzed. This function is helpful for restoring the proper data polarity 
when the transmitter, repeater, or receiver in you communications 
system has an odd number of inversions. These inversions cause the 
received data to be inverted when decoded. 

• When DEC:POL ‘Norm’ is used, a logical high (1) is displayed when a 

positive peak in the received signal is detected. A negative peak 
displays a logical low (0).

• When DEC:POL ‘Invert’ is used, a logical low (0) is displayed when a 

positive peak in the received signal is detected. A negative peak 
displays a logical high (1).

Inverting amplifiers used in transmitters, receivers, and repeaters can 
cause an inversion of the modulating digital data. If the decoded signal 
does not display the expected results, change the polarity to see if the 
signal is being inverted before it is decoded.

DEC:POL ‘Norm’

‘Invert’

DEC:POL?

DEC:POL controls the 

 field on the SIGNALING DECODER 

screen when the 

 field is set to 

 or 

.

This command is used to disarm the decoder when you are making 
single measurements (DEC:ARM:MODE ‘Single’). It is not used with 
continuous measurements. 

DEC:STOP

DEC:STOP controls the 

 field on the SIGNALING 

DECODER screens.