slice:dhv
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slice:dhv [2020/05/25 21:24] – [Setting the Bias Voltage] Kurt Vogel | slice:dhv [2024/04/09 21:54] (current) – Adding direct link to "Load Size..." app note Thomas Bersano | ||
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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, | + | <WRAP center round box>The SLICE-DHV is a low-noise, high-bandwidth, |
- | + | ||
- | 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 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. | 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. | ||
| | ||
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| Control Interfaces | | Control Interfaces | ||
| Output Voltage Range | 0-200 V | | | Output Voltage Range | 0-200 V | | ||
- | | Modulation Modes | + | | Gain Ranges |
^ Modulation Gains || | ^ Modulation Gains || | ||
- | |Unity Gain Mode \\ Full Range Mode | 1 V/V \\ 20 V/V | | + | |Unity Gain \\ Full Range |
^ Bandwidth | ^ Bandwidth | ||
|Small Signal\\ Large Signal | |Small Signal\\ Large Signal | ||
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| Output Current | | Output Current | ||
| Modulation Input Voltage Range | ±10 V((see note in <tabref no_neg> | | Modulation Input Voltage Range | ±10 V((see note in <tabref no_neg> | ||
- | | Voltage Noise | + | | Voltage Noise |
| Accuracy | | Accuracy | ||
| Drift | | Drift | ||
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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 high voltage output. This display is intended to display the " | 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 " | ||
- | ==== Setting the Modulation Mode ==== | + | ==== Setting the Gain on the Input Signal |
- | 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. \\ | + | The Gain on the input control signal can be set to either 1 or 20. When the gain is 1, the input modulation signal is directly summed with the DC Bias to produce the high voltage output. |
- | In Full Range mode the input modulation | + | When the Gain is set to 20, the input signal |
- | To change the modulation mode, touch the CH 1 (or CH 2) field at the top of the channel column. | + | To change the Gain, touch the CH 1 (or CH 2) field at the top of the channel column. |
< | < | ||
< | < | ||
+ | ====Choosing Current Limited or Full Bandwidth==== | ||
+ | On newer models of the SLICE-DHV, a feature was added which allows the user to switch the Modulation Mode of their unit between Current Limited, and Full Bandwidth. These two modes control the amount of drive current which can be sent through the output op-amp to modulate the load attached to HV out. In Full Bandwidth mode, the current through the op-amp is not limited, giving the SLICE-DHV a larger modulation bandwidth. The drawback, however, is that the output op-amp will occasionally go into thermal shutdown, or show distortions when driven especially hard, or with larger loads. In Current Limited mode, the output op-amp is throttled slightly to prevent the thermal shutdown and distortions seen in Full Bandwidth mode. However, using Current Limited mode slightly reduces the overall bandwidth of the system. | ||
+ | It is recommended to use the Full Bandwidth modulation mode if in the small signal regime (G=1 output mode, < 20 Vpp modulation), | ||
==== Setting the Voltage Limit ==== | ==== Setting the Voltage Limit ==== | ||
The user can set the maximum voltage output on a given channel so as not to exceed the rated maximum for their device. | The user can set the maximum voltage output on a given channel so as not to exceed the rated maximum for their device. | ||
+ | | <WRAP important></ | ||
==== Setting the Bias Voltage ==== | ==== Setting the 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. | 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. | ||
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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 | + | To set the sweep rate((0-30 Hz)) of the ramp, touch the CH 1 (or CH 2) field to see <imgref CH_settings> |
- | 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 |
To turn on (or turn off) the ramp, touch the Sweep OFF (or Sweep ON) field to see <imgref sweep_ctrl> | To turn on (or turn off) the ramp, touch the Sweep OFF (or Sweep ON) field to see <imgref sweep_ctrl> | ||
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- | ==== Modulation/ | + | ==== Modulating |
- | The user can input an analog voltage signal to control the output of the SLICE-DHV. Before introducing a control | + | The user can input an analog voltage signal to control the output of the SLICE-DHV. Before introducing a modulation |
- | The default modulation input is the SMA connector on the rear panel (bubble 3, <imgref back> | + | The default modulation input port is the SMA connector on the rear panel (bubble 3, <imgref back> |
- | While similar in performance, | + | While similar in performance, |
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< | < | ||
- | === 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. | + | Change the input impedance of the two front-panel input ports. |
- | === SLICE Firmware === | ||
- | From time to time, Vescent will upgrade the firmware for controlling the SLICE-DCC. | ||
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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 ===== | ||
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It is possible to control the SLICE-DHV through serial commands. | It is possible to control the SLICE-DHV through serial commands. | ||
- | Please contact [[[email protected]|sales [at] vescent [dot] com]] for information. | ||
+ | <WRAP round important 100%> | ||
+ | Upgrading the SLICE-DHV firmware is not always necessary to use the Serial API. Check your installed firmware version in the settings menu against the most recent firmware version given [[https:// | ||
+ | </ | ||
+ | |||
+ | |||
+ | Please contact [[[email protected]|sales [at] vescent [dot] com]] for information. | ||
===== Maintenance ===== | ===== Maintenance ===== | ||
There are no user-serviceable parts inside this instrument. Refer all repairs to the manufacturer. | There are no user-serviceable parts inside this instrument. Refer all repairs to the manufacturer. |
slice/dhv.txt · Last modified: 2024/04/09 21:54 by Thomas Bersano