Vescent SLICE-DHV Bedienungsanleitung
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Product Manuals - https://www.vescent.com/manuals/
SLICE-DHV Dual-Channel High-Voltage
Amplifier
The SLICE-DHV is a low-noise, high-bandwidth, high-voltage source with DC bias control and
sweep capabilities. It is designed for controlling piezoelectric transducers used for precision
positioning, with particular application to laser frequency stabilization. The high-voltage output
can range from 0 to 200 V, has a voltage noise <500 µV rms, can drive ±200 mA, and has an
unloaded small-signal (±10 V) bandwidth >1 MHz. The SLICE-DHV also has a user-settable
voltage limit for safe operation at voltages less than 200 V.
The SLICE-DHV features two Gain values: G=1 and G=20 for the input modulation signal. When G
is set to 1, the output range is limited to ±10V from the user-settable DC bias voltage. When the
Gain is set to 20, the modulation input signal allows access to the full range of the SLICE-DHV
(0-200 V). When the Gain is set to 1, the SLICE-DHV has better noise performance than when the
Gain is set to 20.
The SLICE-DHV is not recommended for applications that require a large-signal bandwidth greater
than 20 Hz, defined for modulation amplitudes more than 10 V.
Model No. SLICE-DHV
Document Revision: 1
Document Last Updated on 2021/08/26 14:26
Please read Limited Warranty and General Warnings and Cautions prior to operating the SLICE-DHV.
Potential for electrical shock hazard. The
SLICE-DHV can deliver up to 200 V at its
output. Use caution when device is turned
on & enabled.
Useful Links
Click here for the Vescent manuals page.
Click here for the SLICE-DHV API.
Click here for the SLICE-DHV web page.
Click here for the Github page for SLICE-DHV firmware revisions
Please check back for added functionality. Contact sales [at] vescent [dot] com for questions and
corrections, or to request added functionality.
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List of Warning Symbols
Warning. Pay special attention to procedures
and notes. If procedure is not followed
carefully, damage to the SLICE-DHV or
devices connected to it may occur.
Potential for electrical shock hazard.
Important. Pay close attention to manual
instructions for optimum results and in order
to not damage the device.
Tab. 1: List of warning symbols
The SLICE-
DHV High-
Voltage
Amplifier is
intended for,
among other
tasks, driving
tuning
elements in
external cavity
diode lasers.
When using
lasers,
particular care
must be given
to avoid
radiation
exposure
hazards.
Tab. 2
Description
The SLICE-DHV (figure 1) is a high-bandwidth, low-noise, high-voltage amplifier. It is intended to
supply a voltage to a piezoelectric transducer (PZT) for precision motion control, including cavity
length control for laser frequency stabilization applications.
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Fig. 1: The SLICE-DHV
Purchase Includes
SLICE-DHV Dual-channel High Voltage Amplifier
AC power cord with appropriate wall plug for you location (if known)
Final Test Documentation
If your shipment is missing any items from the above list, please contact the factory.
Absolute Maximum Ratings and Power Input
Note: All modules have been designed to be operated in a laboratory environment as described in
table 3.
Parameter Rating
Environmental Temperature 15°C < T < 30°C
Environmental Humidity <60%
Environmental Dew Point <15°C
Maximum AC Line Input Current 2 A
Tab. 3: Absolute Maximum Ratings
The SLICE-DHV will accept input line voltages within the ranges shown in table 4. The SLICE-DHV is
powered by Vescent's proprietary power supply technology which allows a range of voltage inputs,
but retains the noise qualities of a linear supply.
Parameter Value Units
Input Line Voltage 100-240 VAC
Frequency 50-60 Hz
Phase 1 phase
User-serviceable fuse1) T 2.0 A L 250V
Tab. 4: Input Voltage Specifications
Proper Usage
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If this instrument is used in a
manner not specified by the
manufacturer in this manual
or other relevant literature,
protection provided by the
instrument may be impaired.
Use caution when connecting
the SLICE-DHV to your
device. The SLICE-DHV can
output up to 200 V without an
input signal. It is advised that
you power off the device
before making connections to
it.
Always power down the SLICE-DHV completely before making connections to a laser.
Never connect or disconnect the SLICE-DHVs to/from a laser with the SLICE-DHV
energized.
As with any flexible instrumentation, improper usage can cause irreparable damage to
the device. Please take note of all warnings and cautions.
Specifications
Performance2)
Parameter Value
Number of Channels 2
Control Interfaces Touch screen, USB 2.0
Output Voltage Range 0-200 V
Gain Ranges
Unity Gain: ±10 V around a
user-settable voltage
Full Range: 0-200 V
Modulation Gains
Unity Gain
Full Range
1 V/V
20 V/V
Bandwidth
Small Signal
Large Signal
>1 MHz, unloaded
<20 Hz, Cload <0.5 µF
Performance
Output Current ±200 mA
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Modulation Input Voltage
Range ±10 V3)
Voltage Noise <450 µV rms (10 Hz - 100
kHz)
Accuracy <1%
Drift 0.2 mV/°C
Triggering 5V TTL
Tab. 5: Specifications of SLICE-DHV
Most PZTs
should not be
driven with
negative
voltages, and
the user
should consult
the specified
safe operating
voltage range
for their PZT.
Be aware that
the high-
voltage output
can be driven
to a minimum
of -10 V when
applying a
modulation.
Tab. 6
Load Capacitance Approximate Bandwidth
1 nF 200 kHz
Tab. 7: Approximate bandwidth of SLICE-DHV as a function of
load capacitance
Front Panel
An image of the front panel of the SLICE-DHV is shown in figure 2. The functions and connections are
as follows:
Channel indicator; touch for Channel parameter settings1.
High-voltage ON/OFF2.
Bias set point3.
Output voltage indicator4.
Parameter adjustment rotary knobs5.
Maximum voltage indicator4)
6.
Front-panel control signal inputs7.
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Control bar8.
Internal ramp amplitude9.
Internal sweep ON/OFF/SWEEP TUNE selection10.
Visual output voltage indicator11.
Signal monitor outputs12.
Fig. 2: Front of SLICE-DHV
Rear Panel
An image of the rear panel is shown in figure 3. The functions and connections are as follows:
Serial Number location1.
High Voltage output (CH 2; BNC)2.
Modulation input (CH 2; SMA)3.
Main On/Off power switch4.
Fuse location5)
5.
AC line power in6)
6.
Output trigger (BNC)7.
Input trigger (BNC)8.
USB port for serial communication (Type B)9.
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Fig. 3: View of rear of SLICE-DHV
Use caution
when
connecting the
SLICE-DHV to
your device.
The SLICE-
DHV can
output up to
200 V without
an input
signal. It is
advised that
you power off
the device
before making
connections to
it.
Getting Familiar with the SLICE-DHV
The SLICE-DHV is designed to be operated from the touch screen GUI and/or serial commands
delivered from a Windows® 10 PC over the USB connection on the back of the chassis. Both the touch
screen and serial commands allow access to all of the SLICE-DHV functionality.
Screen Navigation
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Home Screen
When presented with a given view, it is possible to select the functionality or edit the values in any
field bordered in blue. When a particular field is actively being edited, its border will change to yellow.
The ability to edit a yellow-bordered field will automatically time out after about 60 s and the border
will turn back to blue. The Home Screen of the SLICE-DHV is shown in figure 4 and is reached by
touching the home button (figure 5) in the upper left corner of the touch screen. From the Home
screen, summary control over each of the two channels is possible, including setting the bias voltage.
From the Home screen, you can edit the control parameters for each channel.
In general, the status displayed in an editable field is the current status (not the result of touching the
button). Touch the button to select a new value/status. For instance, in figure 4 both channels are ON.
Touching the ON button will stop voltage output to the given channel.
Fig. 4: Home screen of SLICE-DHV
Control Bar
On the left edge of the screen is the Control Bar. At any given time, these buttons will have the
following effect.
Home Button
Fig. 5: Home button Returns to Home screen.
Back Button
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Fig. 6: Back button Returns to previous screen. Changes will be lost if not accepted before using the
Back button.
Lock Button
Fig. 7: Lock button (shown in unlocked mode) Locks out further modification of operation parameters.
Touch to lock or unlock parameter entry. When in lock mode, it is still possible to toggle the ramp on
and off, but it will not be possible to turn on the high voltage, change the bias voltage, or edit other
operation parameters.
I/O Button
Fig. 8: I/O button Enters the screen for programming the front-panel I/O.
System Settings Button
Fig. 9: System settings button Enters screen for system operational settings (brightness, volume,
etc.).
Entering Values
In most instances, there are two methods for entering parameter values: the physical rotary knobs on
the front panel and the pop-up keypad on the touch screen. When using the knobs to change the
value of a parameter, changes take effect immediately. When using the keypad, changes do not take
effect until the Enter key is touched.
Rotary Knobs
If you touch an editable field for a brief moment, the border of the field will change from blue to
yellow and a cursor will appear under one of the digits of the parameter value (figure 10, CH 1 DC
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Bias [V] field). By turning the right knob, it is possible to increase (cw) or decrease (ccw) the value of
the underlined digit. Turning the left knob will change which digit is editable (cw to move to the right
and ccw to move to the left). Changes made with the rotary knobs take effect immediately. Touch the
yellow-bordered field again to exit the edit mode.
Fig. 10: Knob adjustment of Bias Voltage set point for CH 1
Keypad
If you touch an editable field for a longer period of time (~3 s), a numeric keypad will appear as seen
in figure 11. You can enter in the full value of the desired parameter with this keypad. Changes
entered through the keypad are not enacted until the Enter key is touched.
Fig. 11: Pop-up Keypad
The action initiated by each button of the keypad is described below.
Escape
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