DMR Settings -Basic settings -Voice Header Preamble

Voice Header Preamble

    Voice header preamble is a string of bits added in front of a voice header before transmitting the first frame of voice communication. This preamble prolongs the voice header in order to reduce the chances of the voice header being missed by the receiving radio. This feature sets the duration of the preamble. This duration needs to be increased as the number of scan members increases on the target. This value can be increased in all the transmitting radios if scanning radios are often missing data. However, a larger preamble occupies the channel longer. Therefore, increasing this value will increase the success rate of data received while other radios are scanning, but will decrease the amount of data that can be transmitted on the channel.

Range:

    0~10 : Power saving mode affects the range of this value

Step:

    1

Default:

    2

Note:

    -Voice header preamble frame is not applicable when the value is set to 0

    -This feature is supported in Digital mode only.