Agilent Technologies 83620B User Manual

SCPI COMMAND SUMMARY
Frequency Subsystem
Anytwo frequency setting headers (STARt, STOP, CENTer, or
SPAN) may b e sent in a single message and the resulting sweep
is what was requested. The order of the headers in the message
does not makeany dierence in the nal result. When a message is
completed, coupling equations are used to x the unset parameters to
the correct values. These equations specify that:
center frequency = (start + stop) / 2
frequency span = (stop 0 start)
If more than two are sent, then the last two in the message are used
to determine the sweep and no errors are given.
If only one header is sent in a message, then the assumed pairs are
center/span and start/stop. In other words, if only center is sent,
then span is kept constant (if possible) while adjusting center to the
requested value. The start/stop frequencies are updated to reect the
changes based on the coupling equations.
The swept signal generator uses \bumping" to move unspecied
frequency parameters, but if the nal value of any of the frequency
headers is the result of bumping, then an error is generated since
the user is not getting what was specied. This means, to guarantee
sequence independence requires sending the frequency pairs in a
single message.
Example 1: (present state start = 5 GHz, stop = 6 GHz)
FREQ:STARt 20 GHZ an error results since the
stop frequency is bumped.
FREQ:STOP 22 GHZ the nal sweep does not
generate an error
(20 to 22).
Example 2: (present state start = 5 GHz, stop = 6 GHz)
FREQ:STOP 22 GHZ no error is generated,
start frequency is unchanged.
FREQ:STARt 20 GHZ stil l no error.
Example 3: (present state start = 5 GHz stop = 6 GHz)
FREQ:STARt 20 GHZ;STOP 22 GHZ both are ne,
FREQ:STOP 22 GHZ;STARt 20 GHZ no errors.
 FREQuency:CENTer <num>[freq
suffix]|MAXimum|MINimum|UP|DOWN
 FREQuency:CENTer? [MAXimum|MINimum]
Sets and queries the center frequency.
The *RST value is (MAX + MIN)/2.
 FREQuency[:CW|:FIXed] <num>[freq
suffix]|MAXimum|MINimum|UP|DOWN
 FREQuency[:CW]? [MAXimum|MINimum]
 FREQuency[:FIXed]? [MAXimum|MINimum]
Operating and Programming Reference S-35

Agilent Technologies 83620B Specifications

General

Brand	Agilent Technologies
Model	83620B
Category	Inverter
Language	English