Operation Manual LB2001
Sacher Lasertechnik
GmbH
_____________________________________________________________________________________________________
Adress:
Sacher Lasertechnik GmbH
Rudolf-Breitscheid-Str. 1-5
D-35037 Marburg, Germany
Tel.: +49 (6421) 305-0
Fax.: +49 (6421) 305-299
EMail: contact@sacher-laser.com
Web: http://www.sacher-laser.com
Sacher Lasertechnik, LLC
5765 Equador Way
Buena Park, CA 90620, USA
Tel.: 1-714-670-7605
Fax: 1-714-670-7662
Email: sales@sacher-
laser.com
Page 30
Version:
Preliminary 2011-01-01
5.7. Summing Amplifier
The LB2001 has two external modulation inputs that are independently available for such
applications as adding a modulation frequency to the output for lock-in detection or summing
in a feed-forward correction signal for improving the command response of the feedback
control. The signals applied to these inputs are summed with the sweep and control signals to
form the output signal.
Sweep In1 has a addition attenuator which is useful when laser scan should be successive
reduced until the lock point is found.
The Laser Center level could be adjusted with the “Center” rotary switch. The default
incremental step size is 0.3 mV. By pressing the switch the step size is increased to
80 mV
The Sweep In 1attenation level could be adjusted with the “Scan” rotary switch from
127 (Min attenuation to 0 (max. attenuation). The default incremental step size is 1.
Two LED’s indicate when minimum and maximum rails are reached.
An additional amplifier with polarity control after the summing amplifier gives the user
flexibility to adapt the servo controller to the end application.
The Modulation inputs are placed on the rear side of the housing
Sweep In 2
Sweep In 1
Output LP
Summing
Amplifier
Output
Lowpassfilter
input
DAC
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