THORLABS TPZ001, Руководство пользователя

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44 HA0143T Rev 12K Sept 2015
Chapter 6
Output Voltage Range
Maximum Voltage - used to set the maximum output voltage of the piezo controller.
This must be set up to suit the maximum specified operating voltage of the piezo
actuator connected to the unit. Most Thorlabs piezo actuators are specified for either
75V or 150V maximum operation. In general, the maximum voltage should not be
exceeded because it can cause damage to the piezo actuator.
The output voltage range can be selected from 75V, 100V or 150V. Of these 3
settings, 75V and 150V are hardware limits: the piezo unit contains an internal
clamping circuit that limits the output voltage to approximately 10% above these
values. (Piezo actuators can tolerate a 10% overvoltage without damage.) The 100V
limit is a software limit: under software control (for example, by turning the ‘Output’
control knob) it is not possible to exceed this limit but using the external inputs (SMA,
Hub channel 1 or Hub channel 2) the limit can be exceeded. Therefore exercise care
when 100V piezo actuators are driven under external input control.
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 T-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