One or more of these units, used in combination with the
TR21143 Input Block enables each channel selector unit to
input and automatically switch up to 10 channels (5 channels
for 3/4-wire inputs). Up to four of these units may be connected,
expanding the input capability to 40 channels. The use of the
TR13206 GPIB Adaptor Unit enables the channel selection of
these units to be externally controlled.
