Encore Electronics

MODEL 225 DIGITAL FREQUENCY TO VOLTAGE CONVERTER

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Features

  • Fast response
  • High accuracy
  • Input isolation to 1000 V
  • Digital and analog outputs

Description
The Model 225 digital frequency to voltage converter (shown above) can be configured in either a seven module rack or two module carry case.  A power supply module provides the required unregulated DC voltages to operate the system.  The unit can operate over a wide band of frequencies ranging from 0.5Hz to 25,600Hz.  Output is in both 16-bit digital and analog voltage format.  Two switch-selectable, precision calibration points are available on each module

Product Specifications

Specifications

Input: 0.025V peak to 100V peak
Input isolation: Transformer isolated to 1000VRMS, or direct coupled
Common mode rejection: 2.5VRMS DC to 1kHz will not trigger the unit
Input comparator: Front panel adjustable trigger threshold from 0.02V to 10V; front panel tipjacks for voltmeter monitoring
Frequency ranges: Front panel switch selects one of eight fullscale ranges: 200Hz, 400Hz, 800Hz, 1600Hz, 3200Hz, 6400Hz, 12800Hz, or 25600Hz
Low-input cutoff: Input signal frequency below 0.25% fullscale will cause outputs to go to zero and a no-input indication to light
Pulse output: Logic level (0-5V) output at the input frequency
Analog output: Jumper selectable 0-5VDC or 0-10VDC fullscale output, with front panel trimpots to adjust span and zero; front panel tipjacks for voltmeter monitoring
Calibration: Internal crystal oscillator provides 10% and 100% fullscale calibration frequencies on remote command or by front panel switch
Output accuracy: ±0.05% of fullscale reading
Transient response: 4/f (four periods of input signal) max. (two to three typical) up to 3200 Hz range; higher ranges are eight periods, 16 periods, and 32 periods
Output noise: 2mVRMS max., DC to 100kHz

 

Digital Outputs

Digital outputs:
Frequency 16-bit binary number, 0 to 65535
Data valid One bit
No input One bit
Selected
range
Three bits
Data enable
strobe input
One bit

 

Rack Mount


Rack Mount

Carrying case: One- and two-module desk-top cases, Model 4009-106 and 4010-110
Mechanical: 19″W x 7″H x 17.5″D, eight-module rack adapter, Model 4007-136

MODEL 225 DIGITAL FREQUENCY TO VOLTAGE CONVERTER RACK

MODEL 225 DIGITAL FREQUENCY TO VOLTAGE CONVERTER RACK