QM1003-2-18 RF Downconverter
User Manual
2.5 FREQuency:LO1:EXTernal [1
|
0]
This command allows the user to select between the internal LO1 local oscillator and an externally sup-
plied one. Issuing this command overrides the back panel toggle switch setting.
When
0
is specified, the internal LO1 local oscillator is used by the RF Downconverter.
When
1
is specified, the external LO1 input is used by the RF Downconverter.
Syntax
1
:
FREQ
:
LO1
:
EXT
Space
0
?
Example
:FREQ:LO1:EXT 0
This command selects the internal LO1 oscillator
.
Default Condition
On power up, or when a
*RST
command is issued, the QM1003-2-18 returns to the boot state’s setting.
The RF Downconverter default setting is 0.
Query
:FREQ:LO1:EXT?
This query returns a 0 or 1 to indicate the selected RF Downconverter reference
mode
∙
0 is returned if the internal LO1 oscillator is selected
∙
1 is returned if the external LO1 is selected
Error Message
If the parameter is not in the recognized format, error
-102, "Syntax error"
occurs.
If the parameter is not 1 or 0, error
-222, "Data out of range"
occurs.
Quonset Microwave
Revision 0.1.0
33
