Moscow Technical University of Communications and Informatics under contract with the Russian TV & Radio Network (RTRN) will fulfill DRM SFN tests on the HF.
Transmissions will be held from 06 UT 21 May to 06 UT on May 22 at the frequencies of 9740 kHz (9820 kHz) and from 06 UT on May 23 to 06 UT on May 24 at the frequencies 7370 kHz (7430 kHz). Also from 06 UT on May 28 to 06 UT on May 29 at different frequencies (9740, 9820, 7370, 7430 kHz).
Two transmitters will be used:
1 - Bolshakovo, 15 kW, beam 40 (9.7 MHz, 7.4 MHz);
2 - Krasnodar, 30 kW, beam 347 (9.7 MHz) and beam 337 (7.4 MHz).
Every hour the first transmitter will on the air in the first 40 minutes and the second transmitter will on the air in the last 40 minutes.
Thus the first 20 minutes you can listen to the first transmitter, middle 20 minutes - both transmitters in SFN, and the last 20 minutes - the second transmitter.
The purpose of the study - the detection of network gain (% of decoded audio from the first TX, from the second TX and from the both TX).
Synchronization point will be near Moscow. Switching between the frequencies in the same band will be operative to minimize interference from other stations.
Transmission may also be heard in the Nordic and Baltic countries.