This is a collection of Polytec board photos from items I found on the Internet or eBay. Here is picture collection #1.
VM301-2200A Master Oscillator Board (80 MHz Bragg)
VM301-2260D Master & Local Oscillator Board (80 MHz Bragg and 30-60 MHz VCO)
VM301-2261D Master & Local Oscillator Board (80 MHz Bragg and 30-60 MHz VCO)
VM301-2300B Local Oscillator (30-60 MHz VCO)
VM301-2400C Output Board
VM301-2400E Output Board
VM301-2510A Input Board Scan.
VM301-7300B Replacement Board
VM301-5000G Delay Line Decoder (Velocity Decoder)
VM301-5000I Delay Line Decoder (Velocity Decoder)
VM301-5001A Delay Line Decoder (Velocity Decoder) (OVD-02)
The Polytec OVD-02 is the most popular velocity decoder. It uses a special FM decoding scheme. Its high bandwidth (1.5 MHz) and high amplitude (velocity 10 m/s and acceleration 9.600,000 g) ranges make it ideal for all applications ranging from low frequency measurements to ultrasonics and high-g evenls such as pyroshock.
VM301-6000C PLL Velocity Decoder (OVD-01)
The Polytec OVD-01 is a velocity output module which plugs into the OFV-3001 modular controller. It consists of one printed circuit board. The OVD-01 uses a special PLL decoding scheme which converts the Doppler signal from the optical sensor into a calibrated velocity output. The OVD-01 is characterized by it's very high linearity (0.5%) and low noise level. The maximum operating frequency is 50 kHz. There are 5 different velocity ranges to choose from: 10 mm/s, 50 mm/s, 250 mm/s, 1.25 m/s and 10 m/s full scale peak.
VM301-6000E PLL Velocity Decoder
VM301-7100E Quadrature Demodulator
Coaxial inputs are labeled "SUM", "DIR", "CARRIER", and "40 MHz REFR"
LT1016, MCL PSCQ-2-50, MCL SRA-1, MCL PLP-50, MCL PLP-30, MCL PLP-90
VM301-7200D Fringe Counter
I believe this is the "displacement board." It measures displacement by optical fringe counting. The optical "fringes" are converted to digital signal via a high-speed comparator (LT1016, on another board), which feeds a 12-bit up/down (phase lead/lag) ripple counter (74AS169), which feeds a parallel-loaded 12-bit digital-to-analog converter (DAC80). The DAC's current output signal is then converted to a voltage representation of the displacment (LH0032).
LH0032, DAC80-CBI-I, 74S132, 74AS169, 74LS123
VM302-2000A Bragg Cell
External 80 MHz input for a 40 MHz drive?
OFV-501 Sensor Head
CLV-M100-LD12A Input Module (Level Display)
CLV-M001 Output Module
CLV-M200 Input Module
CLV-M010 Velocity Decoder
CLV-M003 Output Module
