Patton electronic 1004S Accessing the Configuration Switches, Setting the DCE/DTE Switch

3.0 CONFIGURATION

The Model 1004 is configured using six PC board mounted switch- es. Figure 1 shows the switch locations, along with the location of the terminal blocks and optional surge protectors:

3.2 ACCESSING THE CONFIGURATION SWITCHES

The five switches shown in Figure 3 configure the Model 1004 for RTS/CTS delay, echo, method of carrier control, impedance and

DCE/DTE

Switch

2-Wire/4-Wire

Switch

Control

Switches

Surge

Suppressors (1004S only)

Terminal

Block

2-wire/4-wire operation. These switches are located internally on the Model 1004's PC board. To access switch set 1 (SW1) and switch set 2 (SW2), use a small flat blade screwdriver to pop open the Model 1004's case as shown in Figure 4.

“ON”

“OFF” 1 2 3 4

Figure 1. Model 1004 board, showing switch locations

3.1 SETTING THE DCE/DTE SWITCH

For your convenience, the Model 1004 has an externally accessi- ble DCE/DTE switch (Figure 2). If the device connected to the Model 1004 is a modem or multiplexer (or is wired like one), set the switch to “DTE”. This setting causes the Model 1004 to behave like Data Terminal Equipment and transmit data on pin 2.

If the device connected to the Model 1004 is a PC, terminal or host computer (or is wired like one), set the switch to “DCE”. This set- ting causes the Model 1004 to behave like Data Communications Equipment and transmit data on pin 3.

DCE DTE

Figure 2. Close up of the external DCE/DTE switch

SW1 SW2

Figure 3. Close up of switches SW1 and SW2 on the PC board

Figure 4. Opening the Model 1004's plastic case with a small screwdriver

3 4