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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.
1 2 3 4 5 6 7 8
OFF
S1
Configuration
Switches
Figure 1. Model 1140A Configuration Switches External Position
3
1 2 3 4 5 6 7 8
OFF
S2
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.
Figure 2. Close-up of DIP switches showing "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.
S1 SUMMARY TABLE
Position
Function
S1-1
Data Rate
S1-2
Data Rate
S1-3
Data Rate
S1-4
Data Rate
S1-5
Clock Source
S1-6
Clock Source
S1-7
Async./Sync.
S1-8
Carrier Control
Figure 3. Summary of DIP switch default settings for set S1
ON
OFF
Factory Default
}
On
Off
9,600 bps
Off
On
}
On
Internal
On
On
Async.
Off
Constantly On
4
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