Patton electronic Asynchronous, 1012ARC Features, Description, Moving the Configuration Straps

2.0 GENERAL INFORMATION

Thank you for your purchase of this Patton Electronics product. This product has been thoroughly inspected and tested and is warranted for One Year parts and labor. If any questions or problems arise during installation or use of this product, please do not hesitate to contact Patton Electronics Technical Support at (301) 975-1007.

2.1 FEATURES

•Houses two short range modems

•Full or half duplex

•Asynchronous data rates to 38.4 Kbps

•Point-to-point or multipoint

•Automatic equalization and gain control

•Software and hardware handshaking

•Distances to 6 miles over two unconditioned twisted pair

•Transformer isolation

•Silicon Avalanche Diode surge protection

•Mounts in Patton’s rack chassis

•Made in USA

2.2 DESCRIPTION

The Patton Model 1012ARC is a miniature rack card designed to house two asynchronous short range modems. Operating full or half duplex at data rates to 38.4 Kbps, the Model 1012ARC supports point- to-point or multidrop applications and offers automatic equalization and gain control. The Model 1012ARC supports distances up to 6 miles over two twisted pair. Built-in transformer isolation and surge protection provide protection against ground potential differences and AC/DC over-voltages, making the Model 1012ARC ideal for connections between two buildings.

The Model 1012ARC is designed to mount in Patton’s Model 1000R16P rack chassis. This 16-card chassis has a switchable 120/240 volt power supply and uses mid-plane architecture: The front card can be plugged into different rear cards. This means that the 1012ARC can have several interface options, and can be switched with other Patton short haul cards. The rear card is available with an RJ-45 connection for each RS-232 channel and either RJ-11 or RJ-45 connections for twisted pair.

3.0 CONFIGURATION

The Model 1012ARC rack card is easy to set up since there are only two configuration straps. Figure 1 (below) shows the location of these straps on the Model 1012ARC PC board.

RTS Channel A

RTS Channel B

Figure 1. Model 1012ARC, showing straps locations

3.1 MOVING THE CONFIGURATION STRAPS

Figure 2 shows how to move the configuration straps. Note that the Model 1012ARC only has two pegs, thus the straps can only be “installed” or “removed”. The rear card uses three pegs, and can be on either pegs 1 and 2, or pegs 2 and 3.

1 2 3 1 2 3 1 2 3

Figure 2. Orientation of interface card straps

3.2 SETTING THE RTS/DCD STRAPS

Each RTS/DCD strap affects one of your modems. Their setting determines how the respective transmitters (i.e., carrier) are activated. When these straps are installed, the Model 1012ARC transmitter is CONTROLLED CARRIER. When these straps are removed, the transmitter is CONSTANT CARRIER. Each strap may be configured separately.

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