Patton electronic 1140RC Configuration Switch SET S2, S2 Summary Table, Rear Card Configuration

3.1.2 CONFIGURATION SWITCH SET “S2”

The DIP switches on S2 set word length, extended signaling rate, RTS/CTS delay and V.52 and V.54 diagnostic test. The default settings are summarized in the table below. Following the table is a description of all possible S-2 switch settings.

S2 SUMMARY TABLE

Position	Function	Factory Default
S2-1	Word Length	Off	} 10 bits
S2-2	Word Length	Off
S2-3	Extended Signaling Rate	Off -2.5% to +2.3%
S2-4	RTS/CTS Delay	On	} 7 mS
S2-5	RTS/CTS Delay	On
S2-6	Future Use	-
S2-7	Future Use	-
S2-8	V.52/V.54 Tests	Off	Enable

S2-1 and S2-2: Word Length

Switches S2-1 and S2-2 are set in combination to determine the word length for asynchronous data.

S2-1	S2-2	Setting
Off	On	8 bits
On	On	9 bits
Off	Off	10 bits
On	Off	11 bits

S2-3: Extended Signaling Rate

The setting for switch S2-3 determines the range of variability the Model 1140RC “looks for” in asynchronous data rates (i.e., the actual variance from a given frequency level the Model 1140RC will tolerate).

S2-3	Setting
Off	-2.5% to +1%	Basic
On	-2.5% to +2.3%	Extended

S2-4 and S2-5: RTS/CTS Delay

The combined settings for switches S2-4 and S2-5 determine the amount of delay between the time the Model 1140RC “sees” RTS and when it sends CTS. Options are no delay, 7 ms and 53 ms.

S2-4	S2-5	Setting
On	On	7 mS
Off	On	53 mS
On	Off	No delay
Off	Off	No delay

S2-8: V.54 Loopback Test Enable

To reset the V.54 circuit, set switch S2-6 to the “ON” position, then back to the “OFF” position..

S2-8	Setting
Off	V.54	Enable
On	V.54	Disable

3.2 REAR CARD CONFIGURATION

The Model 1140RC is compatible with two dual-fiber interface cards, one with dual ST connectors and one with dual SMA connectors. Both cards use an HD-26 female for the RS-232 interface. The single configuration jumper (JB1) functions identically on both cards. Figure 3 (below) shows the jumper’s location.

JB1

(pin 1 on left)

Figure 3. Model 1140RC rear card jumper location

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