Wednesday, August 21, 2019

Special DRM Broadcasts for HFCC 2019 in Buenos Aires, Argentina


HFCC conveners had hoped for more, but here are a few DRM broadcasts targeting the HFCC 2019 meeting in Buenos Aires, Argentina.

Transmission will originate by Encompass Digital Media Services on Ascension Island. All days are 16.00-17.00 UTC on 21630 kHz bearing of 245 degrees. Four different content providers will air, one each day.
  • Monday 26 August – BBC World Service [English]
  • Tuesday 27 August – KBS World Radio (Korea) [Spanish]
  • Wednesday 28 August – NHK World Radio (Japan) [Spanish]
  • Thursday 29 August – TWR (TransWorldRadio) [Spanish]

In addition, Vatican Radio will also carry a special broadcast in DRM during the HFCC meeting. Monday 26-Thursday 29 August at 18.30 -19.00 UTC on 17535 kHz from Santa Maria di Galeria bearing of 230 degrees. Program will consist of music with text in English and Spanish.

Rumors of new DRM receivers are in the air. I'm anticipating reports from the meeting soon. Stay tuned!


Thursday, August 1, 2019

DRM Decoder Android app

Holy crap! I have not tried this yet, but one of our intrepid readers may figure it out. FREE from here. If you have success, let us know on the DRMNA Yahoo Group.

Wednesday, July 31, 2019

KTWR DRM VOACAP plots

KTWR is planning an RF party and Asia is invited! Take a look at these VOACAP plots posted by KTWR and you can post your reception details here. I'm anxious for my 日本人 friends to give their reports. Please post to DRMNA Yahoo group also.

This plot shows the "blistered paint" expected in South East Asia. I can confirm KTWR in analogue has killer signals in Viet Nam. Let's hope folks are monitoring in India where DRM is the native digital standard for audio broadcasting.

Look how cool this is! KTWR will use different parameters with their DRM broadcasts so they can determine what works best. DRMNA loves KTWR :-)

Wednesday, July 24, 2019

KTWR Guam to start regular DRM transmissions

The following details come from Brother Alokesh via his RADIOACTIVITY blog...

Seriously, let KTWR/TWR know if you can hear them. KTWR has a great reputation among the Japanese DXers. Show them YOU are listening too and that you care about quality DRM broadcasing. Click here to enter your reception report.

KTWR is about to start regular DRM broadcasts to four different areas. There will be broadcasts one day per week to each of four areas starting 5 August 2019. They will be working with the content server parameters to come up with the best compromise settings for each area. Each week will have different settings. KTWR will really appreciate your feedback for as many weeks as possible. Your assistance will ultimately help give your fellow listeners the best possible reception in the long run. For now, all programs will be in English.

The schedule will be as follows, starting the week of 5 August through the end of the A19 broadcast season:

Day                 Freq                Time                   Region                   Power
Monday         11580kHz    1215-1245 UTC       South Asia                90kW
Tuesday        11995kHz    1026-1056 UTC       ANZ/South Pacific      50kW
Wednesday    11995kHz    1026-1056 UTC          China                    50kW
Thursday       11995kHz    1026-1056 UTC       Japan/Korea              50kW

Thursday, June 13, 2019

DRM on 11M in Budapest - watch for Sporadic-E openings!

"...The Budapest University of Technology joined the DRM effort in 2015. “As specialists dealing with various broadcasting standards, we are enthusiastic about the opportunities of DRM and we wanted to join the professional activity of the DRM Consortium” ― explains Csaba Szombathy, head of the broadcasting laboratory which started a 1-year DRM broadcast on 1 June 2019.

The current short wave DRM transmission performed from the university has two main objectives: partly to demonstrate the value-added possibilities of DRM (xHE-AAC coding, slideshows and Journaline advanced text services accompanying the audio content), and partly to provide an opportunity for receiver manufacturers to test their products in real life. Since this is not a public or commercial service, the modulation parameters (transmission mode, SDC and MSC constellations, interleaving depth, etc.) can be freely changed at any time. Developers are, therefore, welcome to perform field tests with their devices in Budapest working in close co-operation with the broadcasting team of the Department of Broadband Infocommunications Systems and Electromagnetic Theory of the Budapest University of Technology. The landscape of the Hungarian capital is particularly interesting because the town is partly built on a flat area, partly on hills. The two sides are separated by the river Danube and are exhibiting various interesting wave propagation phenomena.

The transmitted content is a 24-hour program, played out in a loop, compiled by the media partner of the project, Radio Maria. Initially, AAC coding is used, but the intention is to migrate to the most advanced xHE-AAC codec and to add Journaline along with a slideshow. The Fraunhofer Institute in Erlangen, Germany, provides substantial support for this upgrade."

The technical parameters of the demonstration broadcast in Budapest, Hungary, are as follows:

Frequency: 26060 kHz
EIRP: approximately 100 W
Antenna: 5/8 l monopole
Transmission time: 24/7

Whole story here.