Radioddity Extended manual for Radioddity DB25-D, DB40-D & GD-88 v3.0
© Radioddity 2023 page 218 of 252
8. Set ‘RX TS’ and ‘TX TS’ both to ‘On’ in order to not use TDMA for dividing the
channel into 2 slots
9. Set ‘RX CC’ and ‘TX CC’ both to the very same value as the other station
10. Set ‘TX Policy’ to ‘Impolite’
11. Within the field ‘Contacts’ of the channel definition select the private contact
as defined.
12. Set Encryption to ‘Off’
13. Set APRS to ‘Off’ for now
Write your settings to the radio. Do not forget to switch to Zone ‘simplexDMR’ and
select channel ‘DMRsimplex’ at your Radioddity DB25-D, DB40-D or GD-88. Now
you are ready for your very first simplex digital DMR QSO with the selected station.
16.5 Simplex digital DMR operation with a Single-HAT hotspot
In order to setup the radio for simplex digital DMR operation, follow these steps:
1. Within the ‘Contacts’ menu define a TalkGroup (‘Contact Name’) with the
corresponding ‘Contact ID’ (DMR ID) you plan to use. Set the ‘Call Type’ to
‘Group Call’. e.g.
2. Next Create an RX Group that does contain the previously created TalkGroup.
e.g.
3. Add a new zone via ‘Zone[Channel]’ → ‘+Add’ and give it a ‘Zone Name’ of
‘simplex HS’. The new zone will be created and will already contain a channel
of either ‘CH mode’ being ‘analog’ or ‘digital’.
4. Setup the channel for ‘CH mode’ being ‘Digital’.
5. Give the channel a ‘CH Name’ of some name, e.g., ‘HS TG 99’.
6. Set both frequencies ‘RX Freq’ and ‘TX Freq’ to the very same value (e.g.,
433.45000 MHz). You may choose any frequency that is allowed for your type
of ham radio license, for digital DMR operation and which is not occupied by
some other station. Make sure the simplex hotspot is setup for the very same
simplex frequency.
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