Filter
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Signal Conditioning Measurement Operations & Settings
Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Fifth Edition 149
command:
:INPut[n][:CHANnel[m]]:OFFSet
syntax: :INPut[n][:CHANnel[m]]:OFFSet<wsp><value>[dB] | MIN | DEF | MAX
description: Sets the offset factor (α
Offset
) for the instrument. This factor does not affect the filter atten-
uation (
α
filter
). It is used to offset the attenuation factor values. This offset factor is used,
with the attenuation factor, to set the attenuation of the filter. In this way it is possible to
compensate for external losses.
α
(new)
(dB) =
α
filter
(dB) +
α
Offset (new)
(dB)
Set the offset factor by sending a value (the default units are dB), or by sending MIN, DEF, or
MAX.
parameters: <value>[dB]
MIN
DEF
MAX
The offset factor (α
Offset
) in dB.
Sets the minimum value for α
Offset
= - 200dB.
Sets the default value for α
Offset
= 0dB.
Sets the maximum value for α
Offset
= + 200dB.
response: none
example: INP1:OFFS 2dB
affects: All attenuator modules
command:
:INPut[n][:CHANnel[m]]:OFFSet?
syntax: :INPut[n][:CHANnel[m]]:OFFSet?<wsp>MIN | DEF | MAX
description: Returns the current value of the offset factor (α
Offset
), in dB.
parameters: MIN | DEF | MAX Returns the minimum, default, or maximum value of the offset factor.
response: 4 byte Intel floating point; offset in dB.
example: INP1:OFFS? → 2<END>
affects: All attenuator modules
command:
:INPut[n][:CHANnel[m]]:OFFSet:DISPlay
syntax: :INPut[n][:CHANnel[m]]:OFFSet:DISPlay
description: Sets the offset factor (α
Offset
) such that the attenuation factor is zero.
α
Offset (new)
(dB)
= α
Offset (old)
(dB) - α
(old)
(dB) = -
α
filter
(dB)
parameters: none
response: none
example: INP1:OFFS:DISP
affects: All attenuator modules