Black Box Cable Box May-95 User Manual
14
MULTI-FUNCTION LD CARD
S2 Position 3: V.52 and V.54 Diagnostic Testing
To reset the V.54 circuit, turn switch S2 position 3 ON, then back OFF.
To reset the V.54 circuit, turn switch S2 position 3 ON, then back OFF.
S2-3
Test Mode
Off
Normal Operation (default)
On
Test Disabled
S2 Positions 4 and 5: RTS/CTS Delay
Set positions 4 and 5 of switch S2 to determine the amount of time the Multi-
Function LD Card waits after it “sees” RTS before it sends CTS. Possible
settings are no delay, 7 ms, or 53 ms.
Set positions 4 and 5 of switch S2 to determine the amount of time the Multi-
Function LD Card waits after it “sees” RTS before it sends CTS. Possible
settings are no delay, 7 ms, or 53 ms.
S2-4
S2-5
RTS/CTS Delay
On
On
7 ms (default)
On
Off
53 ms
Off
On
No delay
Off
Off
No delay
S2-6: Signaling-Rate Range
Set position 6 of switch S2 to determine the degree of asynchronous data-rate
fluctuation that the Multi-Function LD Card will accept (that is, how much
variance from a given frequency level the Card will tolerate).
Set position 6 of switch S2 to determine the degree of asynchronous data-rate
fluctuation that the Multi-Function LD Card will accept (that is, how much
variance from a given frequency level the Card will tolerate).
S2-6
Signaling-Rate Range
Off
-2.5% to +1% (default)
On
-2.5% to +2.3%
S2-7 and S2-8: Word Length
Set positions 7 and 8 of switch S2 to determine the word length that the Multi-
Function LD Card will expect for synchronous or asynchronous data. For
example, if you are using the most common data format (1 start bit,
8 data bits, 1 stop bit, and no parity), you would use the factory-default word-
length setting (10 bits).
Set positions 7 and 8 of switch S2 to determine the word length that the Multi-
Function LD Card will expect for synchronous or asynchronous data. For
example, if you are using the most common data format (1 start bit,
8 data bits, 1 stop bit, and no parity), you would use the factory-default word-
length setting (10 bits).
S2-7
S2-8
Word Length
On
Off
8 bits
On
On
9 bits
Off
Off
10 bits (default)
Off
On
11 bits