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Search: Posts Made By: AF4MP
Forum: Reception Results - Recent Posts 18-08-2018, 15:13
Replies: 4
Views: 138
Posted By AF4MP
Hi Alex, My apologies you are...

Hi Alex,

My apologies you are correct!

http://www.asiaradiotoday.com/news/abu-dhabi-get-first-drm-station
Forum: Reception Results - Recent Posts 17-08-2018, 23:20
Replies: 4
Views: 138
Posted By AF4MP
Hi Alex, That must be the 810 kHz transmission...

Hi Alex,

That must be the 810 kHz transmission from Jabalpur a city located in the central part of India. "Pravasi Bharathi" is an Indian program.

Just like the 828 kHz DRM transmission in Delhi,...
Forum: Reception Results - Recent Posts 17-08-2018, 22:33
Replies: 100
Views: 3,980
Posted By AF4MP
Hi Alan, Although the WINB datacasting is half...

Hi Alan,

Although the WINB datacasting is half the bandwidth of its transmitted signal it is not actually part of the DRM transmission. The datacasting, interestingly, has not been publicly...
Forum: Reception Results - Recent Posts 17-08-2018, 15:08
Replies: 56
Views: 1,563
Posted By AF4MP
China 6030 kHz KiwiSDR reception Yokohama, Japan

Today's reception via the KiwiSDR web receiver in Yokohama, Japan. Audio decoding was 83.12% for the hour and then the auto time-out switched off the internet feed.

The transmitting antenna,...
Forum: Reception Results - Recent Posts 14-08-2018, 14:34
Replies: 100
Views: 3,980
Posted By AF4MP
Hi Alan, With this WINB datacasting in mind,...

Hi Alan,

With this WINB datacasting in mind, you might be interested in the following link which is Part 1 of a series of blogs describing the recent use of shortwave radio for high speed...
Forum: Reception Results - Recent Posts 13-08-2018, 23:20
Replies: 100
Views: 3,980
Posted By AF4MP
Start reading this thread at message number 33...

Start reading this thread at message number 33 for the answer to your question.
Forum: Reception Results - Recent Posts 10-08-2018, 17:06
Replies: 100
Views: 3,980
Posted By AF4MP
WINB 15670 kHz Reception in Sardinia, Italy

VOACAP indicates that the WINB datacasting (plus sibling DRM broadcast) signal should be "stronger" along the Mediterranean Sea at around 1500Z.

Here are two logs from a KiwiSDR receiver using a...
Forum: Reception Results - Recent Posts 10-08-2018, 16:39
Replies: 100
Views: 3,980
Posted By AF4MP
WINB 15670 kHz Reception in Southwest England

This morning WINB resumed datacasting (together with its poor DRM sibling transmission).

Checking the various KiwiSDR web receivers in Europe there were very few that were receiving a signal good...
Forum: Reception Results - Recent Posts 07-08-2018, 16:04
Replies: 56
Views: 1,563
Posted By AF4MP
China 6030 kHz reception at Point Reyes, California, USA

This mornings (1.5 hours) reception at the Maritime Historical Radio Society (MHRS) receiver site in the Point Reyes National Seashore Park, northwest of San Francisco.

The SNR peaked to 22.55...
Forum: Reception Results - Recent Posts 04-08-2018, 03:09
Replies: 5
Views: 210
Posted By AF4MP
in addition to Chris' comments the screenID...

in addition to Chris' comments the screenID indicates that they are transmitting MM (multi-mode) and the Journaline Tab is highlighted.

Clicking on the Tab shows a blank Journaline. (The choice of...
Forum: General Topics 30-07-2018, 01:15
Replies: 5
Views: 162
Posted By AF4MP
Yes, depending on the quality; for example, a 22...

Yes, depending on the quality; for example, a 22 kbps mono signal becomes stereo with an extra 2 kbps.

DRM was designed from the start to be a higher quality transmission platform than standard AM...
Forum: General Topics 29-07-2018, 23:29
Replies: 5
Views: 162
Posted By AF4MP
Very basically the original stereo signal is...

Very basically the original stereo signal is encoded as mono on a bit stream with the missing stereo parameter information added as extra bits.

At the receiver the bit stream is decoded as mono...
Forum: Reception Results - Recent Posts 29-07-2018, 17:24
Replies: 56
Views: 1,563
Posted By AF4MP
China 6030 kHz KiwiSDR reception Yokohama, Japan

Some of the KiwiSDR web receivers in Japan were receiving and decoding and others were not.

Here is today's log from Yokohama (only 1 hour permitted with that receiver).
Forum: Reception Results - Recent Posts 28-07-2018, 19:38
Replies: 56
Views: 1,563
Posted By AF4MP
China 6030 kHz KiwiSDR reception near San Francisco, CA

A very short log from a KiwiSDR web receiver south of San Francisco, CA, USA showing that there was some audio decoding this morning.
Forum: Reception Results - Recent Posts 27-07-2018, 00:11
Replies: 56
Views: 1,563
Posted By AF4MP
According to this Chinese blog...

According to this Chinese blog https://cahcn.github.io/ using Google translation:

July 24, 2018, the second time in China's voice test launch DRM digital AM broadcast.

According to the official...
Forum: Reception Results - Recent Posts 26-07-2018, 13:47
Replies: 56
Views: 1,563
Posted By AF4MP
China 6030 kHz reception near Beijing

This morning, monitoring the Cangzhou KiwiSDR web RX, the transmission was running 64 QAM with 20.96 kbps bitrate and decoded audio bandwidth showing over 15 kHz.
Forum: Reception Results - Recent Posts 25-07-2018, 19:29
Replies: 56
Views: 1,563
Posted By AF4MP
China 6030 kHz reception near Beijing

Was listening to the 6030 kHz DRM transmission via the KiwiSDR web receiver in Cangzhou south of Beijing. The transmission ended just after 1800 UTC.

Attachment 1 - shows the received screen ID,...
Forum: Reception Results - Recent Posts 25-07-2018, 18:44
Replies: 56
Views: 1,563
Posted By AF4MP
KiwiSDR TDoA China 6030 kHz

Just tried out the very neat KiwiSDR TDoA direction finding feature on the China 6030 kHz transmitter.

Using fixes from 1 Russian, 2 Japanese, and 2 Chinese KiwiSDR web receivers the result is shown...
Forum: Reception Results - Recent Posts 25-07-2018, 05:21
Replies: 56
Views: 1,563
Posted By AF4MP
China DRM 6030 kHz

HFCC lists 6030 kHz Beijing , China, with 100 kW to an omni directional antenna.

Inputting these parameters into VOACAP shows a good signal into Japan from 1000 - 2200 UTC. However HFCC listed...
Forum: Reception Results - Recent Posts 24-07-2018, 17:42
Replies: 100
Views: 3,980
Posted By AF4MP
WINB with carrier on Datacast portion

While continuing to monitor WINB via a UK KiwiSDR web receiver, at around 1700 UTC, I noticed a definite carrier on the datacast portion of the signal. I then switched to the Tampa, Florida receiver...
Forum: Reception Results - Recent Posts 24-07-2018, 14:16
Replies: 100
Views: 3,980
Posted By AF4MP
WINB 15670 kHz Latest Spectral View

Nice reception this morning by the KiwiSDR web receiver near Tampa, Florida, USA.

The attachment shows the latest spectral view of the signal. The DRM portion of the signal is the right half, and...
Forum: Reception Results - Recent Posts 01-07-2018, 16:45
Replies: 416
Views: 26,022
Posted By AF4MP
Yes, the operation was a success but the patient...

Yes, the operation was a success but the patient died!
Forum: Reception Results - Recent Posts 19-06-2018, 14:29
Replies: 416
Views: 26,022
Posted By AF4MP
Hi Christian, Thank you for the information, it...

Hi Christian,

Thank you for the information, it is most appreciated!
Forum: Reception Results - Recent Posts 18-06-2018, 19:47
Replies: 416
Views: 26,022
Posted By AF4MP
The DRM waveform is seen here in the Atlanta area...

The DRM waveform is seen here in the Atlanta area now, and a much stronger signal (no audio obviously) via the KiwiSDR receiver in Boston, MA (about 1500 km north).
Forum: Reception Results - Recent Posts 18-06-2018, 19:20
Replies: 416
Views: 26,022
Posted By AF4MP
Bitte, was ist die Macht des Senders auf dieser...

Bitte, was ist die Macht des Senders auf dieser Frequenz?
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