MDS 05-3628A01, Rev. B
MDS 4790M (MPT 1411) I/O Guide
55
Clear To Send
Delay
This screen is used to set or display the Clear-to-Send Delay. This is the amount
of time to wait after RTS is asserted by the host computer on the data port before
asserting the CTS line. When the delay is 0, data will be sent out the data port
without imposing a keying delay.
To change the delay, press ENTER, then use the left/right arrow buttons to select the
digit to change. Then use the up/down arrow buttons to increase or decrease the digit.
Repeat for the other digits if necessary. Press ENTER again to make the change.
Push to Talk Delay
This screen is used to set or display the Push to Talk Delay. This is the amount of
time to wait after RTS is asserted by the host computer before the radio is keyed
and begins to transmit. When the delay is 0, the radio will key up immediately
following the keying signal.
To change the delay, press ENTER, then use the left/right arrow buttons to select the
digit to change. Then use the up/down arrow buttons to increase or decrease the digit.
Repeat for the other digits if necessary. Press ENTER again to make the change.
Soft Carrier De-key
Delay
This screen is used to set or display the Soft Carrier Dekey Delay. This is the
amount of time to wait after a de-key request before actually de-keying the radio.
When the delay is 0, the radio will de-key immediately following removal of a keying
signal.
To change the delay, press ENTER, then use the left/right arrow buttons to select the
digit to change. Then use the up/down arrow buttons to increase or decrease the digit.
Repeat for the other digits if necessary. Press ENTER again to make the change.
Transmit Timeout
This screen is used to display the Transmit Timeout setting, and to enable or
disable this timer. When this timer is enabled, it disables the transmitter after a set
period of time to prevent unnecessary use of the frequency. If the radio is set to
continuous keying (see “Continuous Keying” on page 56), the Transmit Timeout
Timer is automatically disabled.
To enable or disable the timer, press ENTER, then use the up/down arrow buttons
to display ENABLED or DISABLED. Press ENTER to make the change.
See the following command to change the timer delay.
Transmit Timeout
Duration
This screen is used to set or display the Transmit Timeout duration. This is the
amount of time to wait before disabling the transmitter to prevent unnecessary use
of the frequency. If the radio is set to continuous keying (see “Continuous Keying”
on page 56), Transmit Timeout is automatically disabled.
To change the duration, press ENTER, then use the left/right arrow buttons to
select the digit to change. Then use the up/down arrow buttons to increase or
decrease the digit. Repeat for the other digit if necessary. Press ENTER again to
make the change.
Clear to Send Delay
0 milliseconds
CTS [0-255] command,
page 32
Push to Talk Delay
0 milliseconds
PTT [0-255] command,
page 38
Soft Carrier De-key
0 milliseconds
SCD [0-255] command,
page 40
Transmit Timeout
enabled
TOT [ON/OFF, 1-255]
command, page 43
Transmit Timeout
30 seconds
TOT [ON/OFF, 1-255]
command, page 43
