Keysight 53210A Mode D'emploi page 83

[SENSe:]ROSCillator:EXTernal:FREQuency
[SENSe:]ROSCillator:EXTernal:FREQuency? [{MINimum|MAXimum|
The external reference frequency setting is 10 MHz when the counter is shipped
from the factory or following the
setting is stored in non-volatile memory and is not changed after a reset (
instrument preset (
External Reference Example
The following example configures the counter to tune to an external reference if
present, and the expected external frequency is 10 MHz.
SENS:ROSC:SOUR:AUTO ON
SENS:ROSC:EXT:FREQ 10E6
Detecting a Valid External Reference Signal
ExtRef will appear in the top, right corner of the display when a valid (external)
reference is present. If a valid frequency is not present or was not specified, the
message "No valid external timebase" is displayed. The error is also logged in the
error queue.
The presence of a valid external reference can be determined programmatically
with the command:
[SENSe:]ROSCillator:EXTernal:CHECk ONCE
Prior to sending the command,
SENSe:ROSCillator:SOURce:AUTO OFF
The following example checks for an external reference signal applied to the Ext
Ref In connector.
SENS:ROSC:SOUR EXT
SENS:ROSC:EXT:CHEC ONCE
SYST:ERR?
The error queue can be read from the front panel as follows:
Keysight 53210A User's Guide
{1E6|5E6|10E6|MINimum|MAXimum|DEFault}
DEFault}]
SYSTem:PREset
SYSTem:SECure:IMMediate
or Preset key).
// tune to external ref if present
// signal will be 10 MHz
SENSe:ROSCillator:SOURce EXTernal
must be set.
// set source, also disables
// automatic source selection
// check for valid signal
// read the error queue
53210A Measurements
(query form)
command. The
and
3
) or
*RST
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