BNC 1105 Universal Counter - Manual (Page 128)

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Sets or queries the state of the low-pass filter.
Return
A single ASCII-encoded byte. 0 means OFF and 1 means ON.
Note
This will be set to OFF after *RST command
:INPut[1|2]:FILTer[:LPASs]:FREQuency?
Queries the cut-off frequency of the low-pass filter.
Return
Numeric data transferred as ASCII bytes in <NR3> format with six
significant digits.
A value of 100E+3 is returned.
:INPut[1|2]:IMPedance <numeric value> [OHM]
Sets or queries the input impedance. It is either 50Ω or 1MΩ.
Return
Numeric data transferred as ASCII bytes in <NR3> format with six
significant digits.
Note
The input impedance will be set to 1E6 OHM after *RST command.
:INPut3:COUPling?
Queries the channel 3 input coupling.
Return
A sequence of ASCII-encoded bytes:AC.
:INPut3:IMPedance?
Queries the channel 3 input impedance.
Return