Kenwood NX-5000 Series Function Reference page 100

1 DMR CONVENTIONAL SYSTEM
1.19 Migrating Automatically to the Site Providing Better Radio Environment (Site Roaming)
When the transceiver receives a synchronization signal from the repeater, the transceiver basically behaves as follows.
Transceiver
A: The repeater of the DMR Conventional system sends out synchronization signals at a fixed interval. Alternatively, the
repeater of the DMR Conventional system sends out call signals according to the transmission request from other
transceivers.
B: Assuming that the transceiver detected a sufficient RSSI level in a system that is configured as "DMR Site Roaming"
on Personality 4, for example.
C: The transceiver activates Site Roaming Link Delay Time.
D: Upon elapse of the length of time configured in Site Roaming Link Delay Time, the transceiver checks all Personalities
in the same system and searches for the Personality having the strongest RSSI level.
E: After all the Personality checks are complete, the transceiver moves to the Personality with the highest RSSI level (e.g.,
Personality 3) and checks whether the Color Code received matches the Color Code configured as Personality.
If the Color Codes match each other, Revert Channel is updated to Personality 3. Furthermore, if the ID and Slot
Selection are found to be matching in a voice call, the speaker is unmuted.
If the Color Codes do not match each other, the transceiver moves to the Personality with the second highest RSSI
level (e.g., Personality 2) and checks whether the Color Codes match each other. If the Color Codes match each other,
Revert Channel is updated to Personality 2.
F: The transceiver stays in the same Personality and Site Roaming does not resume while the Color Codes are matching.
G: When there is no more signal or when the Color Codes are no longer matching, Dropout Delay Time is activated.
H: After the length of time configured in Dropout Delay Time elapses, the transceiver resumes Site Roaming.
DMR FUNC (K, F)/Ver 2.20
A
Synchronization sign
TX
Repeater 1
RX
TX
Repeater 2
RX
TX
Repeater 3
RX
TX
Repeater 4
RX
1 sec.
TX
Repeater 5
RX
Roaming
D
Personality 5 (Channel 5 -
B
Personality 4 (Channel 4 -
Personality 3 (Channel 3 -
Personality 2 (Channel 2 -
Personality 1 (Channel 1 -
C
Link Delay Time
D
-100
-115
Personality/ Channel 4 5
Figure 1-9 Basic Behaviors of Site Roaming
H
Roaming
E F
G
Dropout Delay Time
-93 dBm
-95
Threshold Level
> -125
1 2 3
CONTENTS
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INDEX