Remote Commands
R&S
®
FSW
1021User Manual 1173.9411.02 ─ 19
Manual operation: See "Reference Frequency Input" on page 569
See "Behavior in case of missing external reference"
on page 570
[SENSe:]ROSCillator:SOURce:EAUTo?
This command queries the current reference type in case you have activated an auto-
matic switch to the internal reference if the external reference is missing.
Parameters:
<Reference> INT
internal reference
EXT
external reference
Example:
SENS:ROSC:SOUR:EAUT?
Queries the currently available reference type.
Usage: Query only
Manual operation: See "Behavior in case of missing external reference"
on page 570
[SENSe:]ROSCillator:TRANge <Range>
Defines the tuning range. The tuning range is only available for the variable external
reference frequency. It determines how far the frequency may deviate from the defined
level in parts per million (10
-6
).
Parameters:
<Range> The possible values depend on the reference source (see
table 9-1).
SMALl
With this smaller deviation (+/- 0.5 ppm) a very narrow fixed loop
bandwidth of 0.1 Hz is realized. With this setting the instrument
can synchronize to an external reference signal with a very pre-
cise frequency. Due to the very narrow loop bandwidth, unwan-
ted noise or spurious components on the external reference
input signal are strongly attenuated. Furthermore, the loop
requires about 30 seconds to reach a locked state. During this
locking process, "NO REF" is displayed in the status bar.
WIDE
The larger deviation (+/- 6 ppm) allows the instrument to syn-
chronize to less precise external reference input signals.
Example:
ROSC:TRAN WIDE
Manual operation: See "Tuning Range" on page 570
Configuring the R&S FSW
To Next Page
Loading...
