Patton electronic 285 ユーザーズマニュアル

3.0  CONFIGURATION

The Model 285 is configured using six PC board mounted switch-

es.  Figure 1 (below) shows the switch locations, along with the loca-
tion of the terminal blocks and optional surge protectors:

For your convenience, the Model 285 has an externally accessi-

ble DTE/DCE switch (see Figure 2, below).  If the device connected to
the Model 285 is a modem or multiplexer (or is wired like one), set the
switch to "DTE".  This setting causes the Model 285 to behave like
Data Terminal Equipment and transmit data on pin 2.  

If the device connected to the Model 285 is a PC, terminal or host

computer (or is wired like one), set the switch to "DCE".  This setting
causes the Model 285 to behave like Data Communications Equipment
and transmit data on pin 3.

3

The five switches shown in Figure 3 (below) configure the Model

285 for RTS/CTS delay, echo, method of carrier control, impedance,
and 2-wire/4-wire operation.  These switches are located 

internally on

the Model 285's PC board.  To access SW1 and SW2, use a small flat
blade screw driver to pop open the Model 285's case as shown in
Figure 4 (below):

4

DCE

DTE

DCE/DTE

Switch

2-wire/4-wire

Switch

Surge

Suppressors

(285S only)

Terminal

Block

Control

Switches

Figure 1. Model 285 board, showing switch locations  

Figure 2. Close up of external DCE/DTE switch  

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

Figure 4. Opening the Model 285's plastic case with a small screw driver