Patton electronic 1203 Data Rate, Carrier Detect, 3.3 RTS/CTS DELAY, Ground, Configuration

3.0 CONFIGURATION

The Model 1203 is equipped with four strapping options that allow configuration to a wide range of applications. To gain access to the internal straps, loosen the hex nuts on the DB-25 connectors and pry open the case between the plastic shell ears. Figure 1 shows the location of each strapping option.

3.1 DATA RATE

The data rate strap controls the rate at which data is transmitted. Adjust the strap to select one of the following options: 7, 14, 28, 56, 112 and 224 Kbps, or external clocking. If “external clocking” is selected, the Model 1203 will automatically match the clocking between your two synchronous devices. The default setting is 56 Kbps.

3.2 CARRIER DETECT

The carrier detect straps allow you to determine whether the carrier is “constantly on” or “controlled by RTS”. By adjusting the strap, you may operate in switched carrier, multi-point and/or hardware handshaking applications. Port 1 and port 2 may be configured separately. The defaults setting is ON for both ports.

3.3 RTS/CTS DELAY

Carrier Detect Data Rate

External Clock 224 kbps 112 kbps 56 kbps 28 kbps 14 kbps 7 kbps

Constant Controlled		Delay
	Port 2
	Port 1	RTS/CTS

0 mSec

		Port 2 Frame	Ground connects	to signal ground
6.6 mSec		Ground
	Port 2
		Port 1 Frame	Ground connects	to signal ground
	Port 1

The RTS/CTS delay straps determine the amount of delay between the time the Model 1203 “sees” RTS and when it sends CTS. In order to emulate either dial-up or leased line modems, you can set this strap at either no delay or 6.6mS. Port 1 and port 2 may be configured separately. The default setting is 6.6mS for both ports.

3.4 GROUND

The ground strap setting connects the protective ground from port 1 or 2 to the Model 1203’s signal ground. The default setting is port 1.

Figure 1. Strap settings for the Model 1203

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