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165-072011 THCD-100 Power Supply Page 21 of 28
the new address. All subsequent communications must use the new address.
The current communication address can be obtained using the query ‘add?’. The returned data is:
ADDR: <address>
5.5. Channel Setup Commands
a) Input Channel Units String – ‘uiu’
The input channel has an associated freeform text field that can be used to identify the units being
used. This command is used to set this and its only parameter is a max of 5 characters for the units
string.
The current units string can be retrieved using the query ‘uiu?’. The data returned is as follows:
INPUT UNITS STR: <units>
… where… <units> = the exact units string as displayed on the front panel
b)
Input Channel Range – ‘uir’
Use this command to set the range of the input channel. The single parameter is the actual value for
the range. The number of decimal places passed in the range value dictates the number of decimal
places shown for the main data output (up to a max of 4 decimal places
– any more will get chopped off)
The current range of the input channel is retrieved using the query ‘uir?’.
The data returned is as follows:
INPUT RANGE: <range>
… where…
<range> = the range of the channel (engineering units)
c)
Input Channel Full Scale – ‘uif’
This command is used to set the full scale voltage for the input channel. The single parameter is the
actual full scale value. The full scale voltage setting for the input channel is retrieved using the query
‘uif?’. The data returned is as follows:
INPUT FULLSCALE: <fs>
… where…
<fs> = the full scale voltage of the channel.
For more information on the use of input range and full scale, see the Principles section 5.2.
5.6. Filtering Commands
a. Filter Band – ‘flb’
This command is used to set the point at which the adaptive filtering kicks in. It takes one parameter
which is the percentage of full scale of the input. Valid values are between 0.01% and 1.00%.
Additionally the parameter can be OFF which will mean the filtering will never kick in, or ON which
means the filtering is always used. Note that if the filter size is set to greater than 5 seconds, the filter
band command will return a Bad Command acknowledgement because the filter is always on in this