PRIB Technical Data

Programmable Radar Interface Board product page 

Power supplies

  • +5V
  • +(7 – 15)V
  • -(7 – 15)V

Inputs

  • 4 x Level detect or relay operated
  • 2 x Pulse; +(5 – 15)V, 75 ohms
  • 1 x Azimuth; Berger synchro or pulsed
  • 1 x Heading Marker; Closed contacts
  • 6 x RS – 422
  • 1 x Video, 50, 75 or 1K ohms
  • 1 x ADC, -20 – +20 V, 1K ohms

Outputs

  • 6 x Pulsed outputs; 50 – 75 ohms, 5 or 14 volts
  • 1 x Closed contacts
  • 8 x RS – 422
  • 4 x Video, 50 – 75 ohms, inverted or non-inverted, switched

Video Performance

The video circuits have double terminated output circuits.
The non inverting circuit is capable of handling video with a – 0.5dB BW of 50 MHz.
The circuit has a rise time well below 10 ns with an Av of one or better.
Below is a series of snapshots illustrating the performance:

The picture to the left shows the impulse response for a 30 ns 1V pulse with a rise and fall time
set to 4.5 ns. The picture to the right shows the impulse response for a 30 ns 5V pulse with
rise and fall time set to 4.5 ns. Some over and under shoot occur.

Rise times below 10 ns is not very likely to occur. The snapshots below illustrates the behavior
of the circuit when the input signals has a rise / fall time of 10ns:

The inverting video output is also quite well behaved. Below is a snapshot of the impulse
response of a 50 ns pulse with rise/fall time of 10 ns (positive going pulse).
The output pulse (negative going) is almost free of ringing.