70
MDS 4790/9790 Series I/O Guide
MDS 05-3438A01, Rev. F
Baud Rate/Format
Use this screen to set or show the communication attributes for the DATA
INTERFACE port. For a description of the communication attributes, see
BAUD
[xxxxx abc] command
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.
To change the baud rate, press ENTER, then press the left arrow button to move
the cursor under the baud rate. Use the up/down arrow buttons to select a new
baud rate.
To change the data format, press ENTER, then press the right arrow button one or
more times to move the cursor (_) under the character to change. Use the up/down
arrow buttons to change the character. Repeat for the other characters in the data
format if necessary. Press ENTER to make the change.
Emphasis
Use this screen to enable or disable pre-emphasis and de-emphasis on the analog
input and output signals.
Pre-emphasis is a function used in older analog radios where the modulating signal
is increased (at the transmitter) at the higher frequencies to increase system
performance. De-emphasis compensates (at the receiver) for a signal that has had
pre-emphasis applied.
To enable or disable pre-emphasis and de-emphasis, press ENTER, then use the
up/down arrow buttons to show ENABLED or DISABLED. Press ENTER to make
the change.
Clear-to-Send
Delay
Use this screen to set or show the Clear-to-Send Delay. This specifies 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 is sent from 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. 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
Use this screen to set or show 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
transmits. When the delay is 0, the radio keys immediately following the keying
signal.
To change the delay, press ENTER, then use the left/right arrow buttons to select
the digit to change. 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.
B a u d r a t e / F o r m a t
9 6 0 0 8 N 1
BAUD [xxxxx abc] command
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E m p h a s i s
e n a b l e d
EMP [ON/OFF] command
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C l e a r t o S e n d D e l a y
0 m i l l i s e c o n d s
CTS [0-255] command
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P u s h t o T a l k D e l a y
0 m i l l i s e c o n d s
PTT [0-255] command
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