53210A Input Signal Conditioning 4
Keysight 53210A User’s Guide 105
Input Impedance
The input impedance of the 53210A counter can be set to either 50
Ω or 1 MΩ
using the command:
INPut[1]:IMPedance {<impedance>|MINimum|MAXimum| DEFault}
INPut[1]:IMPedance? [{MINimum|MAXimum|DEFault}] (query form)
The 50Ω and 1 MΩ impedances allow for impedance matching (termination) and
bridging applications respectively.
Using Probes If using a 1:1 or 10:1 probe, the input impedance of the counter
should be set to match the compatibility (e.g. 50
Ω, 1 MΩ, high Z) of the probe. See
“Setting the Probe Factor” for more information.
Following a reset (
*RST) or front panel preset (Preset), the impedance is set to 1
M
Ω. CONFigure and MEASure do not change the input impedance setting.
Impedance Example
//period measurement of expected 10 MHz signal,
//maximum resolution, use channel 1
CONF:FREQ 0.1E6,MAX,(@1)
INP:IMP 1.0E6 //set impedance to 1 Mohm
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