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Digitizers Command Reference 75Chapter 3
INPut
The INPut command subsystem controls characteristics of the input signal,
including ON/OFF state and low-pass filtering. The command defaults to
channel 1 if you do not specify a channel in the command syntax (e.g.,
INP ON is same as INP1 ON).
Subsystem Syntax INPut[<channel>]
:FILTer[:LPASs]:FREQ 1.5E3 | 6E3 | 25E3 | 100E3
(valid for E1564A only)
:FILTer[:LPASs]:FREQ?
:FILTer[:LPASs][:STATe] ON | 1 | OFF | 0
:FILTer[:LPASs][:STATe]?
[:STATe] ON | 1 | OFF | 0
[:STATe]?
INPut:FILTer[:LPASs]:FREQ
INPut[<channel>]:FILTer[:LPASs]:FREQ 1.5E3 | 6E3 | 25E3 | 100E3 sets the
filter frequency for the 4-channel E1564A Digitizer. The filters are 2-pole
Bessel filters and <channel> is 1 through 4.
NOTE The 2-channel E1563A Digitizer has a fixed 25 kHz filter. The E1563A will
accept this command but cannot change the filter and will not generate an
error.
Comments Filter is Set to Nearest Value: For the E1564A 4-channel digitizer, the filter
will be set to the nearest value that can be achieved by the value specified
in the command. For example, if you specify 10E3, the filter is set to 6K or
if you specify 20E3, the filter is set to 25K. For the E1563A 2-channel
digitizer, the filter will be 25 kHz regardless of what value you input (see
above note).
Executable when initiated: NO
Coupled Command: NO
Reset (*RST) Condition: Filter state OFF
INPut:FILTer[:LPASs]:FREQ?
INPut[<channel>]:FILTer[:LPASs]:FREQ? queries the present filter frequency
setting on the specified channel.