Keysight 53210A Mode D'emploi page 109

Input Coupling
The input to the 53210A counter is either DC (direct) coupled or AC (capacitive)
coupled, and is set using the command:
INPut[1]:COUPling {AC|DC}
INPut[1]:COUPling?
AC
measurable frequency range (channels 1 and 2) with AC coupling is:
DC
– AC = 10 Hz - 350 MHz
– DC = 1 mHz - 350 MHz
DC
instrument (1 mHz - 350 MHz).
coupling setting. Following a reset (
coupling is set to
When selecting AC or DC coupling, the amplitude of the input signal must also be
considered. DC coupling is applicable for most measurements, especially those
requiring a specific trigger level. Rather than reducing the signal amplitude by
changing the counter range, AC coupling can be used to bring the signal in
contact with the hysteresis window defined by the trigger level. This is
represented in
Keysight 53210A User's Guide
coupling removes the signal's DC content and centers the signal at 0V. The
10 Hz
1 mHz
AC
coupling extends the frequency range across the full bandwidth of the
.
ΑC
Figure 4-2
53210A Input Signal Conditioning
and
CONFigure
) or front panel preset (Preset), the
*RST
(also see "Threshold Level and
do not change the
MEASure
Sensitivity").
4
(query form)
109