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V2F100
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Overview of the V2F100
The V2F100 allows users to perform high-resolution voltage-to-frequency conversion, a technique widely used in synchrotrons and other scientific applications. An analogue voltage is converted into an oscillating output, the frequency of which is linearly proportional to the input voltage, with a maximum frequency of 100 MHz. The technique gives 16-bit effective resolution in measurements over 1ms integration time. A significant advantage of this technique, particularly in noisy environments such as beam lines, is that the signal can be transmitted in digital form over long distances with no degradation.
An analogue voltage is converted into an oscillating output, the frequency of which is linearly proportional to the input voltage, with a maximum frequency of 100 MHz. The technique gives 16-bit effective resolution in measurements over 1ms integration time. A significant advantage of this technique, particularly in noisy environments such as beamlines, is that the signal can be transmitted in digital form over long distances with no degradation.
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Specifications
- Output frequency 0 -> 10, 20, 50 or 100 MHz TTL
- Output voltage 0 -> ±10 V or 0 -> ±5 V or 0 -> ±2.5 V or 0 -> ±1 V
- TTL output frequency offset 0 or 12 MHz (for -ve to 0 measurements in predominantly positive data)
- Linearity error ±10ppm at stable temperature
- >16 bit measurements of 1ms acquisition periods
How does it work?
The design of this unit by the ESRF is a major leap forward for voltage to frequency converter (V2F) design, it has led to two orders of magnitude improvement in resolution as well as bringing welcome updates to usability and compatibility.
The configuration of frequency output range on the V2F100 is (10, 25, 50, or 100 MHz), with selectable polarity, frequency offset (0 or 12MHz) and input voltage range (1, 2.5, 5, 10V) are altered with a simple push-button interface on the front panel. This configuration of the V2F is displayed using LEDs and stored through power cycles with non-volatile memory.
In addition to the standard LEMO outputs, the V2F100 has 2-phase quadrature output and absolute digital SSI output available on the rear through a sub-D 15 connector. This enables a setting whereby both the magnitude of the voltage and the polarity is able to be output by the V2F100. SSI is usually used in motor and encoder controls, but is available on a number of instruments for beamlines.
Features of the V2F100
Resolution
The V2F100 was developed with resolution in mind, and gives two orders of magnitude improvement on earlier versions.
Low noise
The V2F100 has significantly lower noise compared to earlier versions of the V2F. Each V2F100 is provided with a comprehensive calibration sheet following thorough testing. Each unit has to meet exacting standards before being shipped to the customer.
Easy configuration
The V2F100 is easy to configure using the CONFIG buttons on the front panel.
Powerful
The V2F100 can drive a longer cable. This gives added flexibility on the beamline as a short signal cable can be employed, with a longer trigger cable into the hutch.
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