Each Model 1080A Series SRM has three sets of eight switches,
yielding 24 total DIP switches. The three sets will be referred to as S1,
S2 and S3. 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.
Switches S1-1 through S1-4: Data Rate Setting
Switches S1-1 through S1-4 are set in combination to determine
the asynchronous and synchronous data rate for the Model 1080A and
1080A-64.
5
MODEL 1080A 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
(1080A)
or
16,000 bps
(1080A-64)
Internal
}
}
Figure 2. Close-up of DIP switches showing “ON” and “OFF” positions
1
2
3
4
5
6
7
8
ON
OFF
ON
Shown in the tables below are DIP Switch settings for Models
1080A and 1080A-64.
Switches S1-5 and S1-6: Clock Source
Switches S1-5 and S1-6 are set in combination to determine the
transmit clock source for the Model 1080A Series.
S1-5
S1-6
Setting
On
On
Internal transmit clock
Off
On
Receive recover clock
On
Off
External transmit clock
Switch S1-7: Asynchronous/Synchronous Mode
The setting for switch S1-7 determines whether the Model 1080A
Series is in asynchronous or synchronous operating mode.
S1-7
Setting
On
Asynchronous
Off
Synchronous
6
S1-1
S1-2
S1-3
S1-4
Setting
Off
On
Off
On
16 kbps
Off
Off
Off
On
32 kbps
Off
On
On
Off
64 kbps
DATA RATE SETTINGS - MODEL 1080A-64
S1-1
S1-2
S1-3
S1-4
Setting
On
On
On
On
1.2 kbps
Off
On
On
On
1.8 kbps
On
Off
On
On
2.4 kbps
Off
Off
On
On
3.6 kbps
On
On
Off
On
4.8 kbps
Off
On
Off
On
7.2 kbps
On
Off
Off
On
9.6 kbps
Off
Off
Off
On
14.4 kbps
On
On
On
Off
19.2 kbps
Off
On
On
Off
28.8 kbps
On
On
Off
Off
38.4 kbps
Off
On
Off
Off
57.6 kbps
MODEL 1080A DATA RATE SETTINGS
