Radioddity DB25-D, Расширенное руководство, Страница: 169 / 209

Radiod d ity Extended manual for Radiod d ity DB25-D & GD-88 v2.0
© Radiod d ity 2022 page 169 of 209
Digital Same Frequency Repeater
The Radiod d ity GD- 88 comes a special feature called ‘SameFrequencyRepeater’,
abbreviated as ‘SFR’. This functionality allows a single Radiod d ity GD-88 to act as a
DMR-repeater for a specific frequency and a specific TalkGroup. This function is
ideal for flexible emergency networks as multiple Radiod
d ity GD-88 allow to setup
a kind of mesh-network. Whilst receiving on one timeslot, the radio transmits the
very same signal on the very same frequency but on the other timeslot. So, RX TS1
→
TX TS2 and RX TS2
→
TX TS1. As the Radiod d ity GD-88 has two fully independent
VFOs (A and B) it is best to setup two SFR-channels with one of them using TX TS1
and RX TS1 and the second one using TX TS2 and RX TS2. Both VFOs do share the
same frequencies for TX and RX, the same ColorCode for TX and RX, the same
digital contact (of type GroupCall) and the same RX-Group containing at least that
digital contact.
Then assign VFO A the SFR-channel with TX TS1 and RX TS1 and VFO B the SFR-
channel with TX TS2 and RX TS2.
If you have multiple Radiod
d ity GD-88, set all of them up the very same way.
Normal, non-SFR-capable dual VFO radios should also be setup the same.
Single-VFO radios such as the Radiod
d ity GD-73 may of course only monitor one
SFR-channel at a time. So, if there is already a QSO ongoing, that single VFO-radio
may need to select the proper SFR-channel whenever only one of the two SFR-
channels is within coverage. But if the radio is located in the middle of two GD-88
(thus hearing one Radiod
d ity GD-88 TX on TS1 and hearing the other Radioddity
GD-88 TX on TS2) it may select either SFR-channel.
Sample settings (only relevant parts shown):