THORLABS MDT693B User Manual

Open-Loop Piezo Controllers
TTN011225-D02, Rev C July 7, 2015
Master Scan Trim
The SCAN TRIM adjusters scale the signals provided by the MASTER SCAN INT
and MASTER SCAN EXT knobs over a range from 80% to 120% on a per-channel
basis. This helps compensate for differences in reactance from one piezo to
another. The SCAN TRIM adjusters are only active when Master Scan mode is
active (i.e., the enable LED must be lit).
Note: The 100% mark is halfway through the adjustment range of the SCAN
TRIM potentiometer. To approximately set the SCAN TRIM to 100%, zero
the pot by turning it counterclockwise as far as possible (a maximum of
four turns). Then adjust the pot clockwise by two turns.
To precisely set the SCAN TRIM to 100%, follow this procedure:
 Adjust all of the INT control knobs counterclockwise as far as possible.
 Disconnect any EXT input connections.
 Adjust all SCAN TRIM pots counterclockwise by a minimum of four turns.
 Apply a 5 V DC voltage source to the MASTER SCAN EXT input.
 Adjust the SCAN TRIM pots clockwise until their displays read 75 V
(assuming the voltage limit is set to 150 V).

THORLABS MDT693B Specifications

General

Brand	THORLABS
Model	MDT693B
Category	Controller
Language	English