IFR COM-120C

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6-36

SECTION 6

OPTIONS

7. Porch Enable

Toggles the Data Back Porch ON/OFF in the Radio Simulator. The LTR

specification requires the radio to generate the back porch, but, some repeaters

fail to function with this field enabled. Therefore, the factory default is OFF.

8. Key Up Delay

Sets the time data is sent after the COM-120C begins transmitting. Factory

default is 40 ms. Shorter values connect more quickly. Use longer values if the

repeater is having trouble locking onto the signal. (Example, a repeater that is

seriously off frequency may exhibit this problem.)

9. Unkey Delay

Sets the time the RF carrier is turned off after the COM-120C stops sending data.

Factory default is 150 mSec. The noise burst after the COM-120C unkeys and

before the repeater squelch closes may confuse the repeater. Increase the time

to help the repeater.

10. Max Retries

Sets the number of times the COM-120C tries to connect to the repeater.

Factory default is 3.

11. Retry Timeout

Tells the COM-120C how long to wait for the repeater response. Factory default

is 500 ms.

12. Recv IF

Set the COM-120C IF Bandwidth filter to use during operation. Factory default is

15 kHz.