Setting Filter Cutoff; Setting Current Sources - HP E1313A Manual

Setting Filter Cutoff

Setting Current
Sources
Chapter 3
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The commands for programmable filters are:
INPut:FILTer[:LPASs]:FREQuency <
to select cutoff frequency.
and
INPut:FILTer[:LPASs][:STATe] ON | OFF,(@<
to enable or disable input filtering.
The cutoff frequency selections provided by the SCP can be assigned to any
channel individually or in groups. Send a separate command for each
frequency selection. For example:
To set 10 Hz cutoff for channels 0, 4, 6, and 10 through 19 send:
INP:FILT:LPAS:FREQ 10,(@100,104,106,110:119)
To set 10 Hz cutoff for channels 0 through 15, and 100 Hz cutoff for
channels 16 through 23 send:
INP:FILT:LPAS:FREQ 10,(@100:115)
INP:FILT:LPAS:FREQ 100,(@116:123)
or to combine into a single command message
INP:FILT:LPAS:FREQ 10,(@100:115);FREQ 100,(@116:123)
By default (after or at power-on) the filters are enabled. To disable or re-
*RST
enable individual (or all) channels, use the
command. For example, to program all but a few filters on, send:
INP:FILT:LPAS:STAT ON,(@100:163)
INP:FILT:LPAS:STAT OFF,(@100,123,146,163)Only channels 0, 23, 46, and 63
Current Source SCPs supply excitation current for all resistance type
measurements. These include resistance, and temperature measurements
using resistance temperature sensors. The commands to control Current
Source SCPs are OUTPut:CURRent:AMPLitude <
and OUTPut:CURRent[:STATe] <
•
The amplitude parameter sets the current output level. It is
< >
specified in units of ADC and for the HP E1505 Current Source SCP
can take on the values
for measuring resistances of less than 8,000 Ohms. Select
488µA
for resistances of 8,000 Ohms and above.
30µA
•
The < ch_list > parameter specifies the Current Source SCP channels
that will be set.
cutoff_freq >,(@<
ch_list
INPut:FILTer[:LPASs][:STATe] ON
All channel's filters on (same as at
*RST).
OFF.
amplitude
enable > .
30e-6 (or MIN ), and 488e-6
Using the HP E1313/E1413
ch_list >)
>)
>,(@< ch_list >)
(or MAX ). Select
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