SECTION 4A - SYSTEM PROGRAMMING
Terminal busy
■ Input polarity: initial setting is "Pos" ■
This programs the sense of the Terminal busy input. It is usually
provided by the Request to Transmit output from another terminal that
is sharing the transmitter with the Model 16. If not used, leave
the input unconnected and program to "Pos".
Parameter
Input Jl-4
Meaning
Pos
ground or low
Busy
Pos
open or high
Clear
Neg
ground or low
Clear
Neg
open or high
Busy
Digital data
■ Transmit data output polarity: initial setting is "Pos" ■
This inverts the data transmission stream. Change it if pagers
fail to respond when all else is working correctly.
Parameter
Data Level
Output
Pos
0
Pos
1
Neg
0
Neg
1
0 or Low
1 or High
1 or High
0 or Low
Channel busy time (x 0.1 sec)
■ COR busy hold time: initial setting is "20" = 2.0 seconds ■
This value sets the length of the hold time from the last receipt of a
"Busy" signal at the Channel Busy and Terminal Busy inputs until
possible PTT relay activation. Multiply the desired time in seconds by
10 to find the value to input. Example: for a channel busy time of 2.5
seconds, enter 25. For 0.8 seconds, enter 8.
Request hold time (x 0.1 sec)
■ RTT relay delay: initial setting is "2" = 0.2 seconds ■
This value sets the length of the minimum delay from closure of the
Request to Transmit relay until the closure of the Transmit/PTT relay
(the Transmit/PTT relay will not close until both the Busy and COR
inputs are clear). Multiply the desired time in seconds by 10 to find
the value to input. Example: for a request hold time of 0.5 seconds,
enter 5.
Request grant time (x 0.1 sec)
■ Transmitter grant time: initial setting is "30" = 3.0 seconds ■
This value sets the length of time that the Model 16 will wait AFTER
releasing the transmitter in response to an asserted Busy input before
attempting to transmit again. Multiply the desired time in seconds by
10 to find the value to input. Example: for a request grant time of
10 seconds, enter 100.
4A-5
