User`s guide

70 53220A/53230A User’s Guide
3 53220A/53230A Measurements
STATus:QUEStionable:EVENt?
A value of +1024 (bit 10) indicates an invalid frequency (time base) error.
Reading the register clears all bits in the register. See Chapter 8 for informa-
tion on the counter’s status system.
Standby Power to the Reference Oscillator (Option 010)
Standby power to maintain the operating temperature of the counter’s
internal OCXO reference oscillator (Option 010) is provided by the the line
voltage or from Battery Option 300. Standby power is enabled and disabled
using the command:
[SENSe:]ROSCillator:INTernal:POWer:STANdby {OFF|ON}
[SENSe:]ROSCillator:INTernal:POWer:STANdby? (query form)
- On enables standby power which maintains the temperature of the OCXO
when the front panel power button is switched ‘off’ (standby). If line power is
removed from the instrument and Battery Option 300 is installed and
enabled, standby power is supplied by the battery. Battery-supplied standby
power is 24 hours.
-Off disables standby power from either the line voltage or battery to the
internal oscillator when the front panel power button is switched ‘off’.
With standby power Off, cycling power on the instrument also cycles power to
the oscillator. This may affect the oscillator’s calibrated accuracy, and sta-
bility may not occur until the specified warm-up time (45 minutes) is
reached.