Keysight 53210A Mode D'emploi page 82

3 53210A Measurements
–
–
–
–
The reference oscillator source is set to
enabled (
SYSTem:SECure:IMMediate
and are not changed after a reset (
Preset key).
Specifying the External Reference Frequency
When the reference oscillator source is
SENSe:ROSCillator:SOURce
frequency of the external signal (to which the internal oscillator is tuned) must be
indicated using the command:
82
selects the counter's internal 10 MHz oscillator. The signal is a
INTernal
0.5 Vrms (into 50 ) sine wave. The internal oscillator signal is also present on
Ω
the counter's rear panel Int Ref Out connector.
selects an external reference signal applied to the rear panel Ext Ref
EXTernal
In connector. The signal must be:
– 1 MHz, 5 MHz, or 10 MHz
– 100 mVrms to 2.5 Vrms
– sine wave
and the frequency must be specified by the
SENSe:ROSCillator:EXTernal:FREQuency
enables automatic selection of the reference oscillator source. If a 1,
:AUTO ON
5, or 10 MHz signal is present on the counter's Ext Ref In connector, source
is set. If a valid signal is not present or is lost, the source
EXTernal
switches to
automatically
Note that specifying an oscillator source (
[
SENSe:]ROSCillator:SOURce
disables automatic selection of the oscillator source. The source is
:AUTO Off
then set by the [
SENSe:]ROSCillator:SOURce
) when the counter is shipped from the factory or following the
On
command.
.
INTernal
INTernal
disables automatic selection.
INTernal
command. Settings are stored in non-volatile memory
) or instrument preset (
*RST
EXTernal
or
SENSe:ROSCillator:SOURce:AUTO
or ) using
EXTernal
command.
with automatic selection
SYSTem:PREset
as set by either
, the lock
Keysight 53210A User's Guide
or