Chapter 1 1-9
Programming Fundamentals
Putting Multiple Commands on the Same Line
:FREQuency
:STARt
:POWer
[:RF]
:MIXer
:RANGe
[:UPPer]
Bad Command Good Command
PWR:ATT 40dB POW:ATT 40dB
The short form of POWER is POW, not PWR.
FREQ:STAR 30MHz;MIX:RANG
–20dBm
FREQ:STAR
30MHz;POW:MIX:RANG –20dBm
The MIX:RANG command is in the same :SENSE subsystem as FREQ, but
executing the FREQ command puts you back at the SENSE level. You must
specify POW to get to the MIX:RANG command.
FREQ:STAR 30MHz;POW:MIX RANG
–20dBm
FREQ:STAR
30MHz;POW:MIX:RANG –20dBm
MIX and RANG are both in the same subsystem (:SENSE) but they are two
separate commands and need a semicolon to separate them.
:POW:ATT 40dB;TRIG:FREQ:STAR
2.3GHz
:POW:ATT 40dB;:FREQ:STAR
2.3GHz
:FREQ:STAR is in the :SENSE subsystem, not the :TRIGGER subsystem.
:POW:ATT?:FREQ:STAR? :POW:ATT?;FREQ:STAR?
:POW and FREQ are within the same :SENSE subsystem, but they are two
separate commands, so they should be separated with a semicolon, not a
colon.
:POW:ATT -5dB;:FREQ:STAR
10MHz
:POW:ATT 5dB;:FREQ:STAR
10MHz
Attenuation cannot be a negative value.
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