Keysight 53210A - Standby Power to the Reference Oscillator (Option 010)

3 53210A Measurements
84 Keysight 53210A User’s Guide
The status of the external reference (time base) is also monitored by the counter’s
Questionable Data register. The register can be queried with the command:
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 information on the
counter’s status system.
Standby Power to the Reference Oscillator (Option 010)