4. Programming Interfaces
Giga-tronics 2400/2500 Microwave Synthesizer Series
98
Programming Manual, Part Number 34783, Rev A, July 2009
Table 9
Source Subsystem – CW Mode SCPI Commands
Command Syntax
Description
[SOURce]:PHASe:[ADJust:] n (RADians|DEGrees)
Sets the relative phase of the output signal. The
default units are in radians where the range is -2
pi
< n < +2
pi
. The command also accepts phase
offsets in degrees where the range is -360° < n <
+360°. Radians are the default units if no units are
specified. Changing frequency automatically resets
the phase offset to zero.
[SOURce]:POWer:ALC:SOURce INTernal
|DIODe|PMETer|DPOSitive
Selects the source of the feedback signal for the
ALC. The DIODe parameter assumes a negative
crystal detector is used. DPOSitive allows for the
use of a positive crystal detector.
[SOURce]:POWer:ATTenuation:AUTO ON|OFF
Sets the Attenuator to Auto (ON) or Manual (OFF).
[SOURce]:POWer:ATTenuation
0|10|20|30|40|50|60|70|80|90
Sets the Attenuator to the specified fixed (manual)
value.
[SOURce]:POWer:ATTenuation?
Queries the Attenuator setting.
[SOURce]:POWer:[:LEVel:][IMMediate:]
[AMPLitude:] <level> (DM | DBM |
dBV)|MAXimum|MINimum
Sets the CW power level to the value specified by
<level>. The units are defined as DM, DBM, or dBV.
[SOURce]:POWer:[:LEVel|:IMMediate|
:AMPLitude]?
Queries the CW power level The value returned is
in dBm.
[SOURce]:ROSCillator:SOURce?
Queries the source of the reference oscillator. The
return value is as follows:
INT The internal oscillator is being used as the
reference.
EXT A signal at the EXT REF IN connector is being
used as the reference.