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INPut[<
port
>]
The INPut command subsystem controls characteristics of the input signal,
including state (on/off), low-pass filtering, and input source impedance. There are
two types of input ports on the HP E1429, single ended and differential, for a total
of 4 input ports.
Since this is a two channel instrument, two input ports share each channel. The
differential input ports are labeled ports 3 and 4. Input ports 1 and 2 are single
ended. Ports 1 and 3 share channel 1, and ports 2 and 4 share channel 2.
Since IMPedance, FILTer, and STATe are settable for each input port, they are
"remembered" so that changes made to FILTer on input port 3 for example, will not
change the settings made previously on input port 1 or vice versa. Just note that the
currently active settings may change when switching between input ports on a given
channel.
The selection mechanism for specifying which of two ports is connected to a given
channel is the SENSe<chan>:FUNCtion "VOLTage:DC <port>" command. See the
SENSe:FUNCtion command for more information.
Note The input filter, impedance, and state can be changed while the HP E1429 is taking
readings (initiated). Due to settling times associated with changing these parameters,
readings taken during this period may have unexpected values.
Subsystem
Syntax
INPut[<
port
>]
:FILTer
[:LPASs]
[:STATe] <
mode
>
:IMPedance <
impedance
>
[:STATe] <
mode
>
232 Command Reference INPut[<
port
>] Subsystem