20
0004-000067
Input Process Variables
The following table lists the PVs for the input or vertical (voltage-axis) settings of the
input channels. These PVs are duplicated for each input channel. In the following table,
N
is substituted with the appropriate channel number (for example: Inp1Enable). The
ZT4xx1 has two channels (
N
= 1 to 2) and the ZT4xx2 has four channels (
N
= 1 to 4).
Process Variable Type
Values
Description
setInp
N
Enable
getInp
N
Enable
bo
bi
0 or 1
Input channel enable for selected channel:
0 = disable
1 = enable
setInp
N
Range
getInp
N
Range
ao
ai
Varies by model,
See Instrument
Manual
Input range in Vpp for selected channel,
Input range is limited to 10Vpp for 50 Ohm
impedance
setInp
N
Delay
getInp
N
Delay
ao
ai
0.0 to 10.0
μ
s
Sets or queries the input channel-to-channel delay
(skew). If all channels have a delay applied to
them the instrument will zero out the smallest
delay and apply the difference to the other
channels.
setInp
N
Offset
getInp
N
Offset
ao
ai
Varies by model,
See Instrument
Manual
Sets or queries the input offset in Volts for
selected channel, Input offset is limited according
to range and impedance settings (see
specifications).
setInp
N
Pos
getInp
N
Pos
ao
ai
0.0 to 1.0
Sets or queries the relative DC voltage offset for
the input channel represented at the vertical zero
for the selected channel. Default waveform
position is 0.5 (50%). The limits upon the input
voltage offset setting are dependent upon the
input voltage range.
setInp
N
ProtState
getInp
N
ProtState
bo
bi
0 or 1
Sets or queries the specified input channel voltage
protection state.
0 = Input channel voltage protection OFF
1 = Input channel voltage protection ON
setInp
N
Imped
getInp
N
Imped
ao
ai
50 or 1e6
Input impedance for selected channel:
50 = 50 Ohm (low)
1e6 = 1 MOhm (high)
setInp
N
Couple
getInp
N
Couple
mbbo
mbbi
Discrete
Input coupling for selected channel:
“AC” = AC Coupling
“DC” = DC Coupling
setInp
N
Filter
getInp
N
Filter
bo
bi
0 or 1
Input lowpass filter enable for selected channel:
0 = bypass
1 = filter enable (20 MHz)
setInp
N
Atten
getInp
N
Atten
ao
ai
0.9 to 1000
Input attenuation for selected channel, typically
used for probe or cable loss correction, input
range and input offset are scaled accordingly, 1.0
nominal, example: use 10.0 for 10:1 probe
