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slice:dhv [2020/05/20 15:49]
Kurt Vogel [Specifications]
slice:dhv [2020/05/25 14:39] (current)
Kurt Vogel [Using the Host GUI]
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 ====== SLICE-DHV Dual-Channel High-Voltage Amplifier ====== ====== SLICE-DHV Dual-Channel High-Voltage Amplifier ======
  
-<WRAP center round box>The SLICE-DHV is a low-noise, high-bandwidth voltage ​amplifier ​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 < 450 µV rms, can drive ±200 mA, and has an unloaded small-signal (±10V) bandwidth > 1 MHz. The SLICE-DHV also has a user-settable voltage limit for safe operation at voltages less than 200 V.+<WRAP center round box>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 (±10V) 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 modulation modes: a unity-gain mode and a full-range mode. The unity gain mode has a 1x voltage gain with a limited operating range of ±10V (-10 V to +10 V input) that is centered around a user-settable DC bias voltage. The full range mode has a 20x voltage gain that operates over the entire 200 V range (0 V to 10 V input). The unity gain mode has better noise performance than the full range mode. The SLICE-DHV features two modulation modes: a unity-gain mode and a full-range mode. The unity gain mode has a 1x voltage gain with a limited operating range of ±10V (-10 V to +10 V input) that is centered around a user-settable DC bias voltage. The full range mode has a 20x voltage gain that operates over the entire 200 V range (0 V to 10 V input). The unity gain mode has better noise performance than the full range mode.
  
-The SLICE-DHV is not recommended for applications that require a large-signal bandwidth greater than 50 Hz, defined for modulation amplitudes more than 10 V.+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.
   ​   ​
 </​WRAP>​ </​WRAP>​
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 <​imgcaption dhv_prod_shot|The SLICE-DHV>​{{ https://​www.vescent.com/​manuals/​lib/​exe/​fetch.php?​media=slice:​dhv:​slice-dhv-mr-angle.png?​200|}}</​imgcaption>​ <​imgcaption dhv_prod_shot|The SLICE-DHV>​{{ https://​www.vescent.com/​manuals/​lib/​exe/​fetch.php?​media=slice:​dhv:​slice-dhv-mr-angle.png?​200|}}</​imgcaption>​
 ==== Purchase Includes ==== ==== Purchase Includes ====
-  * SLICE-DHV ​dual-channel High-Voltage Amplifier+  * SLICE-DHV ​Dual-channel High Voltage Amplifier
   * AC power cord with appropriate wall plug for you location (if known)   * AC power cord with appropriate wall plug for you location (if known)
   * Final Test Documentation   * Final Test Documentation
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 |Unity Gain Mode \\ Full Range Mode                   ​| ​ 1 V/V \\ 20 V/V                                                                       | |Unity Gain Mode \\ Full Range Mode                   ​| ​ 1 V/V \\ 20 V/V                                                                       |
 ^  Bandwidth ​                                                                                                                                   || ^  Bandwidth ​                                                                                                                                   ||
-|Small Signal\\ Large Signal ​                         |  >1 MHz, unloaded\\ <50 Hz, C<​sub>​load</​sub>​ <0.5 µF                                           |+|Small Signal\\ Large Signal ​                         |  >1 MHz, unloaded\\ <20 Hz, C<​sub>​load</​sub>​ <0.5 µF                                           |
 ^  Performance ​                                                                                                                                 || ^  Performance ​                                                                                                                                 ||
 | Output Current ​                                       |  ±200 mA                                                                                | | Output Current ​                                       |  ±200 mA                                                                                |
-| Modulation Range                                      |  ±10 V((see note in <tabref no_neg>​)) ​                                                 | +| Modulation ​Input Voltage ​Range                        |  ±10 V((see note in <tabref no_neg>​)) ​                                                 | 
-| Voltage Noise                                         ​| ​ <450 µV rms (10 Hz - 1 MHz)                                                          |+| Voltage Noise                                         ​| ​ <500 µV rms (10 Hz - 100 kHz)                                                          |
 | Accuracy ​                                             |  <​1% ​                                                                                  | | Accuracy ​                                             |  <​1% ​                                                                                  |
 | Drift                                                 ​| ​ 0.2 mV/​°C ​                                                                            | | Drift                                                 ​| ​ 0.2 mV/​°C ​                                                                            |
-| Triggering ​                                           |  TTL                                                                                   |+| Triggering ​                                           |  ​5V TTL                                                                                   |
 </​tabcaption></​WRAP>​ </​tabcaption></​WRAP>​
  
 <WRAP center round box 60%><​tabcaption no_neg|> <WRAP center round box 60%><​tabcaption no_neg|>
-|  {{ :​warning-sign.png?​300&​nolink }}  | For the best results, the user should ​not attempt to drive the output to a negative value The following equation should not take on a negative value at any time during the experiment: ​  ​\\ V<​sub>​out</​sub>​ = V<​sub>​bias</​sub>​ + G*V<​sub>​input</​sub>​ where G is the Gain as [[slice:​dhv#​setting_the_operation_mode|chosen in the set up steps]].  ​|+|  {{ :​warning-sign.png?​300&​nolink }}  | Most PZTs should not be driven with negative voltagesand 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.   |
 </​tabcaption></​WRAP>​ </​tabcaption></​WRAP>​
  
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 ==== Bar Graph and Output Voltage Indicator ==== ==== Bar Graph and Output Voltage Indicator ====
-The blue bar graph and output voltage indicator (bubbles 11 & 4 in <imgref front>) report the output ​voltageThese displays are useful for quickly identifying drift in the system or that a servo-controlled loop is approaching a rail.  They are designed ​to capture drift and do not have sufficient bandwidth to display ​the instantaneous response ​of the unit to servoing or ramping+The blue bar graph and output voltage indicator (bubbles 11 & 4 in <imgref front>) report the high voltage ​output. ​This display ​is intended ​to display the "​DC"​ value of the output with an update rate of about 4 Hz and will not capture faster transient behavior of the output. These displays offer quick visual identification ​of the output voltage and can help visualize drift in feedback control applications
-==== Setting the Operation ​Mode ==== +==== Setting the Modulation ​Mode ==== 
-The SLICE-DHV has two operation ​modes: ​high bandwidth/​low gain (HBLG) ​mode and low bandwidth/​high gain (LBHG) ​mode.  In LGHB modethe control ​signal ​experiences a gain of 1 and is summed ​into the DC bias.  The control signal summing circuit has very high bandwidth((The exact bandwidth depends on the capacitance of the load)), on the order of 200 kHz This operation ​mode is designed ​for fast servoing around a set point. ​ Since the range of the modulation/​control input signal is ±10 V, this mode allows fast control over the range: V<​sub>​bias</​sub>​ ± 10 V\\ \\+The SLICE-DHV has two modulation ​modes: ​a Unity Gain mode and a Full Range mode. In Unity Gain mode the input modulation ​signal is directly ​summed ​with the DC Bias to produce ​the high voltage output. This mode is useful ​for limiting ​the voltage ​range of the high voltage output to ±10 V around the DC Bias operating voltage. The Unity Gain mode will also exhibit less noise than the Full Range mode, dependent on the noise level of the modulation input signal. \\
  
-In LBHG mode the the control ​signal experiences a gain of 20 and so can be used to sweep the entire 0 to 200 V range of the SLICE-DHV ​with a bandwidth ​of ≥10 Hz full scale\\ \\+In Full Range mode the input modulation ​signal experiences a gain of 20. In this mode the DC Bias defaults to zero voltage but can be adjusted ​to add a DC Bias to the modulation signal if desired. This mode allows the modulation input to drive the high voltage output over the entire 0 to 200 V range of the SLICE-DHV. Note that the large-signal ​bandwidth ​will be limited in this mode to less than 20 Hz, but that the small-signal bandwidth (±10V) will be identical to that of the Unity Gain mode. \\
  
-To change mode of operation, touch the CH 1 (or CH 2) field at the top of the channel column. ​ You will be presented with <imgref CH_settings>​. ​ Touch the Modulation Mode field to drill down to <imgref mod_mode>​ and select either G=1 V/V; Range = ±10 V (HBLG mode) or G=20 V/V; Range = 0-200 V (LBHG mode).+To change ​the modulation ​mode, touch the CH 1 (or CH 2) field at the top of the channel column. ​ You will be presented with <imgref CH_settings>​. ​ Touch the Modulation Mode field to drill down to <imgref mod_mode>​ and select either G=1 V/V; Range = ±10 V (Unity Gain mode) or G=20 V/V; Range = 0-200 V (Full Range mode).
 <​imgcaption CH_settings|Setting parameters of individual channel>​{{ : slice:​dhv:​slice-dhv_ch_settings_changed.jpg?​430 |}}</​imgcaption>​ <​imgcaption CH_settings|Setting parameters of individual channel>​{{ : slice:​dhv:​slice-dhv_ch_settings_changed.jpg?​430 |}}</​imgcaption>​
  
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 ==== Setting the Bias Voltage ==== ==== Setting the Bias Voltage ====
-To set the nominal ​bias voltage about which the SLICE-DHV will operate on a given channel, touch the DC Bias [V] field on the Home screen. ​ Depending on the length of the touch, either a view similar to <imgref Vset_knob>​ allowing rotary knob input or a keypad similar to <imgref keypad> will be displayed. ​ Set the nominal bias voltage. \\ +To set the bias voltage about which the SLICE-DHV will operate on a given channel, touch the DC Bias [V] field on the Home screen. ​ Depending on the length of the touch, either a view similar to <imgref Vset_knob>​ allowing rotary knob input or a keypad similar to <imgref keypad> will be displayed. ​ Set the nominal bias voltage. \\ 
  
 ==== Turning on the High Voltage ==== ==== Turning on the High Voltage ====
  
 <WRAP center round box 60%> <WRAP center round box 60%>
-| {{ :​electric_shock.png?​150&​nolink }}  | 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 the output. ​                                                     |+| {{ :​electric_shock.png?​150&​nolink }}  | 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 the high voltage ​output. ​                                                     |
 </​WRAP>​ </​WRAP>​
 To turn on (turn off) the high-voltage output touch the HV OFF (HV ON) field on the Home screen. To turn on (turn off) the high-voltage output touch the HV OFF (HV ON) field on the Home screen.
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 The SLICE-DHV has an internal ramp function for sweeping the voltage output. The ramp is a sawtooth wave. The SLICE-DHV has an internal ramp function for sweeping the voltage output. The ramp is a sawtooth wave.
  
-To set the repetition ​rate((0-30 Hz)) of the ramp, touch the CH 1 (or CH 2) field to see <imgref CH_settings>​. ​ Touch the Sweep Rate [Hz] field and set the repetition ​rate. \\+To set the sweep rate((0-30 Hz)) of the ramp, touch the CH 1 (or CH 2) field to see <imgref CH_settings>​. ​ Touch the Sweep Rate [Hz] field and set the desired ​rate. \\
  
-To set the amplitude of the ramp((0-200 V)), touch the Range [V] field on the Home screen and set the ramp amplitude. \\+To set the amplitude of the ramp((0-200 V)), touch the Range [V] field on the Home screen and set the desired ​ramp amplitude. \\
  
 To turn on (or turn off) the ramp, touch the Sweep OFF (or Sweep ON) field to see <imgref sweep_ctrl>​. ​ Choose the desired operation mode. To turn on (or turn off) the ramp, touch the Sweep OFF (or Sweep ON) field to see <imgref sweep_ctrl>​. ​ Choose the desired operation mode.
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-==== Modulation/​Control of the SLICE-DHV Output ==== +==== Modulating ​the SLICE-DHV Output ==== 
-The user can input an analog voltage signal to control the output of the SLICE-DHV. Before introducing a control ​signal, make sure you have selected the [[slice:​dhv#​Setting_the_Operation_Mode|desired ​Gain/​operation ​mode]] (HBLG or LBHG).  \\ +The user can input an analog voltage signal to control the output of the SLICE-DHV. Before introducing a modulation ​signal, make sure you have selected the [[slice:​dhv#​Setting_the_Modulation_Mode|desired ​modulation ​mode]] (Unity Gain or Full Range).  \\ 
  
-The default modulation input is the SMA connector on the rear panel (bubble 3, <imgref back>​). ​ The user can also program the SLICE-DHV to accept the modulation/​control ​signal from the front-panel INPUT A for Channel 1 and INPUT B for Channel 2.  Only one modulation input for a given channel can be active at any given time.  To toggle between modulation input locations touch the I/O icon on the control bar and then the relevant INPUT field (A for CH1 or B for CH 2; <imgref input_a>​). Select OFF for rear-panel input or Modulation Input for front-panel input.+The default modulation input port is the SMA connector on the rear panel (bubble 3, <imgref back>​). ​ The user can also program the SLICE-DHV to accept the modulation signal from the front-panel INPUT A for Channel 1 and INPUT B for Channel 2.  Only one modulation input for a given channel can be active at any given time.  To toggle between modulation input locations touch the I/O icon on the control bar and then the relevant INPUT field (A for CH1 or B for CH 2; <imgref input_a>​). Select OFF for rear-panel input or Modulation Input for front-panel input.
  
-While similar in performance,​ the rear-panel input will have maximum bandwidth and minimum noise. ​ Use this input when possible.+While similar in performance,​ the rear-panel ​SMA input will have minimum noise. ​ Use this input when possible.
  
  
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 <​imgcaption settings|User-programmable system settings>​{{ : slice:​dhv:​slice-dhv_settings.jpg?​430 |}}</​imgcaption>​ <​imgcaption settings|User-programmable system settings>​{{ : slice:​dhv:​slice-dhv_settings.jpg?​430 |}}</​imgcaption>​
  
-=== User Interface Appearance ​===+=== Screen Brightness and Volume Adjustment ​===
 From this screen, adjustments to the brightness of the screen and the volume of the audio feedback can be made.  ​ From this screen, adjustments to the brightness of the screen and the volume of the audio feedback can be made.  ​
  
 === Input Impedance === === Input Impedance ===
-Change the input impedance of the two front-panel input ports. ​ Select either 50 Ω or 1 MΩ.+Change the input impedance of the two front-panel input ports. ​ Select either 50 Ω or 1 MΩ. For most applications of the SLICE-DHV, a 1 MΩ impedance should be chosen.
  
 === SLICE Firmware === === SLICE Firmware ===
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-===== Using the Host GUI =====+===== Using the PC Host GUI =====
 Coming soon, please check back later. Coming soon, please check back later.
 ===== Firmware Update ===== ===== Firmware Update =====
slice/dhv.1590014957.txt.gz · Last modified: 2020/05/20 15:49 by Kurt Vogel