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.
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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
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Figure 2. Close-up of DIP switches showing “ON” and “OFF” positions
12345678
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
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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