THORLABS K-Cube Piezo Controller User Manual page 51

6.2.3 Advanced Tab
Drive Input Settings
Analogue Input Mode - This field allows the user to select the analogue input source,
which can be one of 3 inputs:
If Analogue Channel 1 is selected, the feedback signal runs through all the
bays - see Fig. 6.3. This setting is useful in applications where a master cube
is controlling several slave cubes.
If Analogue Channel 2 is selected, the feedback signals run between adjacent
pairs of K-Cube bays (i.e. 1 and 2, 3 and 4, 5 and 6) - see Fig. 6.3. This setting
is useful when several pairs of cubes are being used on the same hub.
If External SMA signal is selected, the signal runs through external connections
via the rear panel EXT IN SMA terminal. This option is useful if a hub is not
available or the controlling signal source is not a member of the K-Cube family
of products. For example, even if a hub is not available, the combination of a
KPZ101 unit with a KSG101 Strain Gauge Reader described above can still be
K-Cube Piezo Driver
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