User`s guide

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Key ID Use the UP/DOWN arrow keys to select the Key ID for this personality.
The valid choices are:
If the received message does not specify a Key ID, the radio will use its
current Key ID.
XL Delay Following Key ID Use the UP/DOWN arrow keys to select the XL delay time following
Key ID for this personality. Values between 0 and 200 ms may be
selected in 50-ms increments. The value selected for this field
determines the length of time to wait, following a Key ID opcode
transmission before the radio is allowed to transmit XL encrypted
audio.
OTAR Tx Use the UP/DOWN arrow keys to enable the OTAR Tx feature. If this
feature is enabled, the radio will be allowed to send OTAR information
on a channel. If this feature is disabled, the radio will not transmit
Rekey Request Acks, Delayed Acks, or Power-Up Acks.
Tx Only The Key ID will transmit at the start of each
transmission.
Rx Only The Key ID will be modified to that specified at the start
of each receive message.
Tx & Rx
Receive/Transmit is a combination of the above
two options.
None (Implies no selection.)