Claudius Obrecht's broadcast to Pacific region in analogue and DRM

Claudius Obrecht's program will be broadcast towards Southeast Asia and Australia :
Date : Saturday 22nd April 2023
Frequency : 21580 kHz
Time : 1300-1400 UTC AM , 1400-1500 UTC DRM

ABC Radio National DRM tests on MW

Great news coming from Australia, ABC National Radio is testing in DRM mode on 747 kHz, from the Broadcast Australia Site at Dockers Plains, Victoria. It was heard by a listener at Melbourne at around 1300 UTC, will share full schedule once available.

Technical Details :

ABC Radio National DRM Test

Logged : 21 July 21

Frequency : 756 kHz AM/747 kHz DRM

Time : 1300 UTC

Txer Site : Dockers Plains, Victoria

DRM mode A

9 kHz Channel

SDC 4 QAM

MSC 16 QAM

Services: 1. xHE_AAC (F03201) Radio National EEP Audio 16.40 kbps

Licence Details :

Frequency : 756 kHz (AM)

Emission Designator : 18K0A3E

Site/Area : Broadcast Australia Site 167 Richardson Rd, DOCKERS PLAINS VIC 3678 (40538)

Licence Number : 1150243/2

Client :  Australian Broadcasting Corporation

Status : Granted

Category : Apparatus Licence

Service : Broadcasting

Sub Service : National Broadcasting

Callsign(s) :  3RN

Date of Effect : 22/Oct/2020

Date of Expiry : 30/Nov/2021

Copy of license is available here :

https://web.acma.gov.au/rrl/licence_image.extract_pdf?pLICENCE_NO=1150243/2

(Alokesh Gupta)

DRM FOR FM – MEASURES UP TO EXPECTATIONS IN INDONESIA

Radio Republik Indonesia (RRI) has just conducted measurements proving the DRM in FM is spectrum, energy efficient delivering audio and text in superior quality without any interference even in very crowded FM environments.

RRI has always been on the forefront in the field of radio broadcasting and on-line radio.

The successful testing and measurements carried out in July came on the back of pioneering DRM deployments in the FM band.

PREPARATION

On 10 June 2020, a digital radio transmitter was installed and commissioned by RRI at Pelubharan Ratu in Sukabumi province, West Java. For this purpose, the Digital Radio Mondiale (DRM)[1] digital radio system was used: this innovative step meant this is the first ever digital radio broadcasting station in Indonesia and in Southeast Asia.

Currently, the Pelubharan Ratu digital radio station is broadcasting three programmes in digital form, RRI Pro 1, RRI Pro 3 and, through its digital technology, news and current affairs information in textual form (in writing) in Bhasa Indonesia. The data provision is done through a digital system known as Journaline. The possibilities are immense as the system can cater to news and other information spanning 64,000 pages.

The second such digital radio transmitter was installed and commissioned on 11 June 2020 at Pantai Labuan in Banten Regency, West Java. Following this, the third DRM FM digital radio transmitter was installed and commissioned in July 2020 in Cilacap, Java Tengah province. These stations also provide similar programmes and digital services. In addition, by August 10, RRI plans to install and commission two more DRM FM transmitters in Painan, West Sumatra and in Labuan Bajo, Nusa Tengarah Timor province in eastern Indonesia.

In July RRI conducted the evaluation of trials and measurements of the Digital Radio Mondiale (DRM) technology in Pelabuhan Ratu area, Sukabumi, West Java, an area often struck by natural disasters.

These activities carried out on Wednesday (23/7/2020) and (Thursday (24/7/2020) were conducted in preparation for the implementation of digital radio.

DRM is an open all-band standard digital audio broadcasting radio technology recommended by ITU and ETSI (EN 302 245 and ES 201 980). DRM has several features and benefits including the incorporated feature of Emergency Warning Functionality (EWF).

DRM can be a digitisation solution both in the MF radio frequency band, or VHF Band II (FM). Irrespective of band, since the DRM standard is one, each DRM radio frequency channel can accommodate up to three broadcast programs (audio) along with text data (presented as news media, advertising, public information, and so on).

DRM is both spectrum and energy efficient and delivers local, regional, national and international coverage. Unlike analogue DRM can be used to achieve broader coverage using the Single Frequency Network (SFN) feature.

DRM can be used on the MF radio frequency bands using the same bandwidth as analogue (AM) and this was successfully demonstrated in Indonesia during the Bogor and Bali trials.

If DRM is used in the VHF Band II it only utilises a 96 kHz that can accommodate up to three audio channels and one data channel. This was also demonstrated by RRI in their trial conducted with the DRM Consortium in Batam. So, half the spectrum for up to three audio channels and one data channel, rather than one analogue audio only programme in FM.

In Indonesia FM is widely used in large cities, so there are not many FM radio frequencies available now. To avoid interference between FM radio broadcasts, the FM broadcast radio frequency channel is ideally separated by 400 kHz (adjacent-4). As DRM can fit in these guard spaces DRM can be a solution even in the cities with a very congested FM spectrum.

The DRM for FM RRI measurements in West Java were carried out for two days, namely 23 and 24 July 2020. The first day, they started with six Test Points (TP), namely TP1 on Karang Hawu Beach, TP2 Karang Papak Beach, TP3 Kadaka Beach, TP4 Vihara Nam Hay Kwan Se Im Pu Sa, TP5 Batu Bintang Beach and TP6 Pantai Loji.

The sixth test point location was obtained based on the results of simulated computer predictions of radiation coverage of an analogue 1 kW FM transmitter.

Measurements were aimed at technically evaluating DRM transmissions and features that can be broadcast through DRM transmitters.

CONCLUSIONS

Based on the results of the field measurements obtained in the six test points covered by the 1kW transmitter it was noted that these can be served with only 50 watts of DRM power delivering throughout a good DRM audio quality. In testing a simulcast broadcast using 1 kW and 800 Watt with spacing distance 150 kHz between the middle frequency FM and DRM, the measurement showed no interference between FM and DRM. The DRM quality was at least equally good to FM, but the sound quality of DRM was even better than FM.

The field test results are thus consistent with the ITU-R Recommendations BS. 1114 and BS. 1660. The next measurement is scheduled to be held at RRI Central Jakarta in August 2020.

For the map, click here : https://tinyurl.com/yxgnwo4d

Related :

DRM Trial Begins Digital Radio Implementation

Translated version :   https://tinyurl.com/y3a4yrkf

Video of field tests : https://youtu.be/sc4_4MZ6AvY

CNR DRM TESTS ON 15580 & 11695

DRM shortwave digital broadcasting test broadcast information

According to the DRM short-wave digital broadcasting related work needs, the new DRM short-wave digital broadcasting test will be broadcasted on October 23, 2018. The specific information is as follows:

1. North China

Frequency: 15580 kHz

Time: 09:00 to 17:00 (BTC), 01:00 to 09:00 (UTC)

Program: CNR1

Launch point: Hainan

Power: 30 kW

2. East South of China

Frequency: 11695 kHz

Time: 09:00 to 17:00 (BTC), 01:00 to 09:00 (UTC)

Program: CNR1

Launch point: Hainan

Power: 30 kW

From October 18th to 21st, the signal will be tested from 09:00 to 17:00 (0100-0700 UTC) every day.

At different times, depending on the transmission conditions, the above two frequencies may have signals in most parts of central and eastern China.

During the test broadcast, it is necessary to stop from time to time according to equipment debugging or testing. The keyword "downtime" can be sent in the public number to know the shutdown information in real time.

Enthusiasts are welcome to take the test and please record the feedback details.

The feedback information may include, but is not limited to, detailed technical parameters such as time, location, equipment, antenna, software settings, environment, and field strength. The feedback form can be text, pictures, videos, and so on.

Welcome to consult and exchange, and make suggestions on the trial broadcast work.

In order to save and organize related information, please send the test record to the feedback mailbox.

Thank you!

Feedback Email: drmrtprc@163.com

More CNR DRM Test - 24th July onwards

CNR (China National Radio) will be having DRM tests on 6030 kHz, 24th July onwards at 0100-0800 UTC

(Alokesh Gupta)

RTI German special broadcasts

The German service  of Radio Taiwan International will have special broadcasts during August, Septemeber and October 2016 directly from Tamshui transmitter site in Taiwan. Reception reports will be verified with a special QSL-card.

Here's the schedule :

Frequency : 11665 kHz

July 22, 2016 at 1600-1610 UTC in AM and at 1620-1630 UTC in DRM (Test)

Aug 26, 27, 28 , 2016 and Sep 02, 03 and 04, 2016 all at 1600-1700 UTC AM

Oct 01, 02, 03, 08 and 09, 2016 all at 1000-1100 UTC in AM

Oct 10, 2016 at 1000-1100 UTC in DRM.

(Ghibaudo, DX-Window No. 559, Danish  Shortwave  Club  International)

KTWR Guam DRM Test

KTWR Guam DRM Tests

Date : 8th & 9th April 2015 (Wed and Thurs)

1000 -1030 UTC (3.30 - 4 pm IST)

Frequency : 15300 kHz (Two channels with different content)

Azi : 255 Deg (so may be heard in southern part of India if at all)

Digital Radio Mondiale™ (DRM) and Radio Republik Indonesia (RRI) Conclude Successful DRM Digital Radio Trial and Workshop

The Digital Radio Mondiale (DRM) Consortium and the Indonesian public broadcaster, Radio Republik Indonesia (RRI), held a most comprehensive DRM30 digital radio trial and workshop in Jakarta, between 24th and 27th of March. This was one of the most comprehensive such events ever organised by the Consortium. The technical presentations on the first day were perfectly illustrated by the medium wave trial organised the next day at the Bogor station, about 60 kilometres south of Jakarta. The practical discussion of the excellent trial results on the 26th and the exploration of all DRM options and benefits completed the picture. On the last day of the workshop a discussion on the best way to introduce DRM countrywide and the possibilities of producing single or multi-standard receivers in the country completed a very successful event.

Mr Sunarya Ruslan, Chairman of the Supervisory Board of RRI Indonesia, hailed the DRM, RRI joint endeavour as most significant: "In our country of over 13,000 islands and about a quarter billion people we want to have radio broadcast services that are economical, easy, and mobile. They need to offer the same good quality to Indonesian citizens, whether they are in big or small cities, near or afar. Good sound, good programmes and available and affordable receivers for everyone is the aim now."

Mr Muhammad Rohanudin, Technology and New Media Director of RRI, was enthusiastic about the ease of adapting the existing analogue infrastructure (in Bogor) in record time in order to carry digital programmes in simulcast or pure digital. He declared the DRM sound quality "spectacular" and thought that "DRM can provide an option for RRI to reach every corner of the country, if all stakeholders work together."

Ruxandra Obreja, DRM Consortium Chairman, was delighted to see that the event involved RRI but also  spectrum specialists, representatives of the government, of private broadcasters and receiver manufacturers. "The DRM trial and workshop", she said, "demonstrated that DRM offers the coverage, multi-platform content, excellent audio quality, extra features and cost savings that really fit with RRI's aspirations. DRM is made for Indonesia and Indonesia is made for DRM."

(Press Release)

Digital Radio Mondiale ™ (DRM) and Voice of Vietnam (VoV) Workshop

The Digital Radio Mondiale (DRM) Consortium and the Vietnamese public broadcaster, Voice of Vietnam (VoV) will hold their first comprehensive digital radio workshop in Hanoi, Vietnam on March the 10th. Vietnam is a large coastal country, with a varied geography and many towns and villages; VoV is exploring ways of meeting the challenge of covering in a spectrum and energy-efficient way the entire country with quality broadcasting services that can be received by its entire population.

Mr Nguyen Dang Tien, President of VOV, says: "VoV is the largest public station in Vietnam covering the entire country with radio programmes in analogue mode. In our radio digitisation process we are looking at the most effective ways to cover both large cities but also regional towns and villages over large and geographically diverse territories. We wish to understand the full potential of DRM and the way it could ensure the full and cost-effective coverage of our large country."

Ruxandra Obreja, DRM Consortium Chairman, is delighted to have the Consortium support VoV in their endeavour: "We believe that the global, open DRM standard (in both AM and VHF modes) will be able to offer enhanced broadcast services and data, to both urban and remote areas. The comprehensive DRM workshop should ideally be followed by a trial which could be run together with the excellent Vietnamese specialists. This will give them the opportunity to experience the quality and benefits of DRM digital radio broadcasting, while the Consortium will learn more about an important Asian country."

The workshop will be supported by key international DRM Consortium members, Fraunhofer IIS, Ampegon and GatesAir.

(Press Release)

DRM Test by KTWR GUAM to South Asia

Please check today and tomorrow evening 8.15 - 8.45 pm IST

DRM Test by KTWR GUAM to South Asia

Date : 23 and 24 Feb 2015

Time : 1445 -1515 UTC

Freq  : 15300 kHz

Power : 90 kW

Azi : 285 deg

Reception reports to info@twr.asia or submit online at http://www.twr.asia/online-qsl-form

KTWR Guam DRM Test - 24/25 May

KTWR, Guam is planning a DRM test to Japan for May 24th and 25th. It will be on 15570 at 1230-1300 UT. The language will be Japanese. While we are really hoping that Japanese SWLs and radio clubs get involved in this test, reports on the side and back lobes would also be appreciated. We will be beaming at a heading of 335 degrees. We will be running 75 kW, so that Japanese listeners in Russia and the EU can tune in as well. We should have good side lobes into Southeast Asia and possibly India. The main beam should be quite strong in Europe. The main back lobe will be toward NZ .

(Mike Sabin, KTWR, May NZ DX Times via DXLD)

AIR Chinsurah testing in simulcast mode

All India Radio, Chinsurah (near Kolkata) is testing its new 1000 kW DRM compatible Thomson transmitter. Test txn is simulcast mode carrying FM Rainbow program noted in 594 kHz AM & 604 kHz DRM around 1030 IST (0500 UTC).

(Sudipta Ghose, Kolkata)

AIR Chennai testing in DRM mode

Arun Kumar Narasimhan, SW listener from Chennai spotted DRM test transmission by AIR Chennai C last week.

Transmission was observed in simulcast mode with analog channel on 783 kHz & DRM channel on 793 kHz (500 watts) using a newly installed DRM transmitter. DRM channel is carrying Vividh Bharati program.

Tentative test schedule for DRM txns (this is not a fixed schedule) :

0730-1030 IST

1630-1930 IST

KTWR Guam - DRM test broadcast

KTWR Guam will be doing a DRM test on 6th March, 2013 (Wed).

Parameters : 16 QAM - Mode B – 14 kbps
FREQ : 15240 kHz
TIME : 0912 - 0942 UTC
CIRAF : 49, 41
PWR : 75 kW
AZI : 290 Deg

Reports appreciated at www.twr.asia/online-qsl-form

Voice of Nigeria testing in DRM mode

Screenshot courtesy Sixten, SM5DAG via drmrx.org forum

Voice of Nigeria noted with test transmission on 15120 kHz at around 1100 - 1530 UTC, logs at :

http://www.drmrx.org/forum/showthread.php?t=2390

KBC Radio DRM test re-scheduled for 13th Nov 2011

From http://www.kbcradio.eu/

There was a problem with the DRM encoder, they are doing their best for tonight 13-11-2011... same time 18.00 UTC on 7590 kHz.

From ....http://www.drmrx.org/forum/showthread.php?t=2372

12-11-2011, 23:15 #7
drmbulgaria

Posts: 42 ... due to the bad luck, the DRM exciter has stuck and the transmitter remained on carrier only, that's the worse start of a new proejcet i could imagine. But thanks for monitoring, we hope we will get it fixed for the next transmission.

Many thanks for monitoring folks, every time the beggining is difficult, but let's hope it will lead to positive results in the future.

KTWR DRM Test

KTWR DRM Test (During the official dedication ceremony)

18 Nov 2011 (Friday)
0900 - 0915 UTC
17640 kHz
75 kW in DRM mode

KBC DRM Test on 12th Nov

KBC Radio DRM Test on : Saturday November 12th at 1800 UTC on 7550 kHz

More at : http://www.kbcradio.eu/?p=823

Also in analog mode at 0900-1600 UTC on 6095 kHz (Sat & Sun)
Weekend schedule at : http://www.kbcradio.eu/?page_id=478

Reception reports to : themightykbc@gmail.com
For a QSL card you have to send 2 USD or 2 IRC’s.

BBC DRM Test

BBC is testing in DRM mode on 9800 kHz at 1330-1345 UTC

Further details at : http://tinyurl.com/3m2q6hf%20 (Translated via google)

(Alokesh Gupta, VU3BSE )

Wave of the Future

Interesting report on KTWR Guam DRM test ...

http://ktwrdrm.blogspot.com/2011/09/wave-of-future.html