Keysight 53210A, User Manual

Page: 43 / 247

Preparation for Use 1
Keysight 53210A User’s Guide 43
The real-time clock is battery-backed and retains the date and time when power
is off. There is no automatic setting of, or automatic return to the current date and
time.
Measurement Time Out
The measurement time-out is the time allowed for each measurement to
complete. If a measurement does not complete before the time out expires,
9.91E37
(not a number) is returned and the display indication is: - - - - - - -. The
sequence continues with the next reading in the sample count.
Specifying a time out prevents the instrument from pausing indefinitely if for some
reason a measurement is unable to complete.
The default and factory-set time out is
1 second . Refer to "Setting the
Measurement Time Out" in Chapter 3 for more information.
Time Base
53210A measurements are based on a reference oscillator - also referred to as an
internal/external clock or time base . A valid reference oscillator signal must be
present for measurements to occur.
Refer to
"Reference Oscillator Configuration" in Chapter 3 for detailed information
on selecting and configuring the reference oscillator source.
Auto Level
The threshold level is the trigger (input) level at which the counter begins the
measurement. Auto-level is the automatic setting of this threshold based on the
positive and negative peaks of the input signal.