Installation Instructions

Hardware Installation
RVP8 User’s Manual
September 2005
2–24
If larger current and voltage loads are required, then the connector panel relays can be used to
switch external relays provided by the customer. Another alternative is to use the additional 4,
12V relay signals (up to 200mA) that are also supported on this connector.
Hazard: External relays must be equipped with proper diode protection against
back-EMF or damage to the I/O-62 and or the connector panel might result.
J7 SPARE: Configurable 20 lines of TTL I/O
This connector supports 20 lines of TTL each of which can be configured as either input or
output via the softplane.conf file.
J8 SPARE: Analog Inputs
10 differential analog inputs, up to ±20V max multiplexed into a single A/D convertor sampling
each at >1000 Hz. This can be used for monitoring environmental systems at the radar site.
J9- MISC: RS422 I/O, D/A and A/D
7 additional RS422 lines, each configurable to be either input or output, and 2 each dedicated
(non–multiplexed) A/D inputs (±580V with pot adjust) and D/A outputs (±10V). The RS422
lines are convenient for high-speed polarization switch control.
J10-11: RS232C I/O
These two connectors can be used for serial angle input. The most common format is the RCV01
format, although custom formats from antenna/pedestal manufacturers such as Orbit, Andrew
and Scientific Atlanta are also supported.
J12: S-D- AZ and EL synchro input
For systems that have synchros, the RVP8 can accept a direct synchro input from both AZ and
EL. The nominal voltage and frequency are 100V @ 60 Hz. S/D conversion is performed in the
I/O-62.
J13-14: TP1 & TP2: Programmable test point scope outputs
Am exciting feature of the RVP8 is the programmable test points. These are usually used to
connect to an oscilloscope. The user can then specify what is output to the test points in the form
of an analog voltage for display on the scope. Some examples are:
S “LOG” receiver power output (an old–time radar A–Scope)
S Burst pulse
S Analog input monitor
The advantage of using the test points is that technicians can leave them permanently connected
to a rackmount oscilloscope and then select what is displayed. This saves time and reduces
cabling errors when test switching cables.