3
4
3.0 CONFIGURATION
The Model 1140A is simple to install and is ruggedly designed for
excellent reliability: just set it and forget it. The following instructions
will help you set up and install the Model 1140A properly. If you have
any questions, don't hesitate to call Patton's Technical Support Hotline
at (301) 975-1007 (9-5 PM, EST).
3.1 CONFIGURATION SWITCHES
The Model 1140A uses a unique set of 16 external mini DIP
switches that allow configuration to an extremely wide range of applica-
tions. These 16 DIP switches are grouped in two eight-switch sets, and
are externally accessible from the underside of the Model 1140A (see
Figure 1). Since all configuration DIP switches are externally accessi-
ble,
there is no need to open the Model 1140A's case for configu-
ration.
The configuration switches allow you to select data rates, clocking
methods, V.52 & V.54 tests, word lengths, extended signaling rates,
async. or sync. mode. The drawings, text and tables on the following
pages describe all switch locations, positions and functions.
The Model 1140A has two sets of eight switches, yielding 16 total
DIP switches. The two sets will be referred to as S1 and S2. As
Figure 2 shows, the orientation of all DIP switches is the same with
respect to “ON” and “OFF” positions.
3.2 CONFIGURATION SWITCH SET “S1”
The DIP switches on S1 set data rate, clock source, async./sync.
mode and carrier control method. The default settings are summarized
in the table below.
OFF
1 2 3 4 5 6 7 8
OFF
1 2 3 4 5 6 7 8
Figure 1. Model 1140A Configuration Switches External Position
Figure 2. Close-up of DIP switches showing “ON” and “OFF” positions
OFF
ON
S1 SUMMARY TABLE
Position
Function
Factory Default
S1-1
Data Rate
On
S1-2
Data Rate
Off
S1-3
Data Rate
Off
S1-4
Data Rate
On
S1-5
Clock Source
On
S1-6
Clock Source
On
S1-7
Async./Sync.
On
Async.
S1-8
Carrier Control
Off
Constantly On
9,600 bps
Internal
}
}
Figure 3. Summary of DIP switch default settings for set S1
S1
S2
Configuration
Switches
