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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 1080ARC (see Table 3).
S1-7: Asynchronous/Synchronous Mode
The setting for switch S1-7 determines whether the Model 1080ARC is in
asynchronous or synchronous operating mode (see Table 4).
S1-8: Carrier Control Method
The setting for switch S1-8 determines whether the carrier is “constantly
on” or “controlled by RTS”. This setting allows for operation in switched
carrier, multipoint and/or hardware handshaking applications (see
Table 5).
Table 3:
S1-5 and S1-6: Clock Source Settings
S1-5 S1-6 Setting
On On Internal transmit clock
Off On Receive recover clock
On Off External transmit clock
Table 4:
Asynchronous/Synchronous Mode Settings
S1-7 Setting
On Asynchronous
Off Synchronous
Table 5:
Carrier Control Method Settings
S1-8 Setting
Off Constantly on
On Controlled by RTS