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The Digitizer Input Section
The HP E1429 2-channel digitizer has single-ended and differential input
ports on each channel. Each input port has a BNC connector and is DC
coupled. A detailed block diagram of the input section is shown in Figure
3-3. Only one channel is shown since both are identical.
SCPI Command
Control
The digitizer’s input section including the input state, input impedance, and
low-pass filtering is controlled by the SCPI INPut subsystem. The input port
is selected by the SENSe[<chan >]:FUNCtion subsystem. The input signal
range is controlled by the SENSe[<chan >]:VOLTage subsystem. The
commands in these subsystems are listed below.
INPUT[<
port
>]
:FILTer
[:LPASs]
[:STATE] <
mode
>
:IMPedance <
impedance
>
[:STATe] <
mode
>
Figure 3-3. HP E1429 Digitizer Input Section
106 Understandin
g
the HP E1429 Di
g
itizer Chapter 3