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Search: Posts Made By: zfyoung
Forum: Reception Results - Recent Posts 14-10-2019, 02:22
Replies: 554
Views: 54,183
Posted By zfyoung
I have the same result over KiWiSDR: good/clean...

I have the same result over KiWiSDR: good/clean signal, but NO audio decoding. Their signals on other freq have the same effect. Maybe due to error in content feeder or they simply use proprietary...
Forum: Reception Results - Recent Posts 15-09-2019, 13:24
Replies: 1
Views: 351
Posted By zfyoung
KTWR on 15200 kHZ to South Asia

New freq, new schedule: very strong and very stable signal, max over 30dB.

Robust mode A should be possible. And bit-rate could have reached over 20kbps.

This is the screen shot from kiwiSDR...
Forum: Reception Results - Recent Posts 20-08-2019, 03:17
Replies: 11
Views: 705
Posted By zfyoung
Thanks, Terje. I should have mentioned that the...

Thanks, Terje. I should have mentioned that the instances where SNR dropped to zero are all network related. By and large, signal is not very strong, but relatively stable.
Forum: Reception Results - Recent Posts 19-08-2019, 13:59
Replies: 11
Views: 705
Posted By zfyoung
via kiwiSDR in Shenzhen South China

via kiwiSDR in Shenzhen (just a stone's throw from Hongkong), South China

Fair signal, deteriorate towards the end of program. It's a pity the first 15 minutes is in silence. Probably they forgot...
Forum: Reception Results - Recent Posts 05-08-2019, 13:29
Replies: 7
Views: 574
Posted By zfyoung
Thumbs up via kiwiSDR in HeBei Prov. central China

Not bad, consider the target zone is South Asia!
SNR peak at 24dB.
Forum: General Topics 05-08-2019, 04:15
Replies: 5
Views: 492
Posted By zfyoung
its a shame that to download this app, I have to...

its a shame that to download this app, I have to find ways to circumvent the GFW of China. Since I have no usable VPN at this moment, can anyone give me a usable/meaningful link? Thanks!

zfyoung
Forum: Reception Results - Recent Posts 19-04-2019, 08:12
Replies: 83
Views: 8,865
Posted By zfyoung
I have the same result at 06:00 UTC, but I don't...

I have the same result at 06:00 UTC, but I don't think it is scrambled DRM. It look like signal excitation malfunction or some similar problems on Tx site. Just take a look on the spectrum waterfall,...
Forum: Reception Results - Recent Posts 12-04-2019, 13:10
Replies: 21
Views: 2,312
Posted By zfyoung
Yep, 8kbps and 64QAM! what are they thinking...

Yep, 8kbps and 64QAM! what are they thinking about?:eek:
Forum: Reception Results - Recent Posts 09-03-2019, 01:33
Replies: 23
Views: 1,507
Posted By zfyoung
I've seen too many broadcasters not very well...

I've seen too many broadcasters not very well adhere to the DRM technical standard if at all. From what I'v gathered from monitor site, their SNR/Field strength ratio is way off the mark (e.g....
Forum: Reception Results - Recent Posts 26-12-2018, 08:15
Replies: 11
Views: 1,463
Posted By zfyoung
Received on 15735 kHz. This test is really...

Received on 15735 kHz. This test is really stretching the DRM standard to the limit: 14.56 kbps = AAC + SBR(12kHz bandwidth) + P.stereo. Very special config. indeed!
Forum: Reception Results - Recent Posts 25-12-2018, 12:53
Replies: 19
Views: 2,179
Posted By zfyoung
Reception via KiWiSDR in Fukushima, JAPAN. Barely...

Reception via KiWiSDR in Fukushima, JAPAN. Barely strong enough for audio decoding.
Forum: Reception Results - Recent Posts 22-12-2018, 12:07
Replies: 19
Views: 2,179
Posted By zfyoung
Thumbs up Again via KiWiSDR in Tokyo, Japan. Very strong...

Again via KiWiSDR in Tokyo, Japan. Very strong and stable signal for the whole test session. Perfect audio decode despite the adjacent channel interference.:)
Forum: Reception Results - Recent Posts 16-12-2018, 13:28
Replies: 19
Views: 2,179
Posted By zfyoung
An informal reception via KiWiSDR in...

An informal reception via KiWiSDR in Lanzenhäusern, Switzerland. Good signal and good audio, but poor freq choice due to interference from lower 5KHz AM broadcast from 1300 UTC.
Forum: General Topics 01-12-2018, 01:13
Replies: 307
Views: 116,072
Posted By zfyoung
https://www.iis.fraunhofer.de/en/pr/2018/20180608_...

https://www.iis.fraunhofer.de/en/pr/2018/20180608_AME_Android.html

This link may be of special interest to potential implementations of xHE-AAC decoding function for DReaM. :cool:
Forum: Reception Results - Recent Posts 18-10-2018, 13:07
Replies: 2
Views: 1,007
Posted By zfyoung
Well...That's what I'm told. If there is any...

Well...That's what I'm told. If there is any doubt, I guess you can just ID the TX site by using direction finding tools, e.g. KiwiSDR TDoA
Forum: Reception Results - Recent Posts 18-10-2018, 09:40
Replies: 2
Views: 1,007
Posted By zfyoung
Smile China National Radio New DRM test frequency

From Oct.23th onwards, CNR will increase its DRM test freq as follows:

15580 kHz, 01:00-09:00 UTC daily, service area: North East China
11695 kHz, 01:00-09:00 UTC daily, service area: East and South...
Forum: Reception Results - Recent Posts 15-10-2018, 05:15
Replies: 2
Views: 1,513
Posted By zfyoung
Got it via KiwiSDR. Unstable signal with wildly...

Got it via KiwiSDR.

Unstable signal with wildly variable field strength. It seems generated from a good quality Tx station. I have the suspicion the encoded bit stream is purposely scrambled to...
Forum: Reception Results - Recent Posts 28-09-2018, 01:41
Replies: 20
Views: 4,742
Posted By zfyoung
Don't know if you've successfully decoded the...

Don't know if you've successfully decoded the FAC/SDC stream. I noticed their signal spectrum has to be flipped to be recognized properly by Dream in contrast to other broadcasters.Their SNR plot...
Forum: Reception Results - Recent Posts 20-09-2018, 10:47
Replies: 9
Views: 2,625
Posted By zfyoung
Both services are at the same bit-rate. As far as...

Both services are at the same bit-rate. As far as I can see the only difference is UEP and EEP (Unequal Error Protection / Equal Error Protection). Theoretically, UEP should be more robust(ie. less...
Forum: Reception Results - Recent Posts 29-08-2018, 14:02
Replies: 1
Views: 878
Posted By zfyoung
AIR on 15040kHz jammed by CNR

Don't know if AIR is aware of fact that their DRM transmission on 15040kHz to South China is jammed by CNR.:( Not enjoyable listening experience due to too many audio disruptions. Could they change...
Forum: Reception Results - Recent Posts 26-07-2018, 02:18
Replies: 130
Views: 22,793
Posted By zfyoung
Nice detective work! Considering the heavy...

Nice detective work! Considering the heavy multi-path character of propagation condition typical for this meter band.
Forum: Reception Results - Recent Posts 25-07-2018, 01:55
Replies: 130
Views: 22,793
Posted By zfyoung
The tip-off did not provide the info. about the...

The tip-off did not provide the info. about the Tx location. On the other hand, you can detect the whereabouts by conducting HF direction finding via KiWi TDoA. Some enthusiast has applied that...
Forum: Reception Results - Recent Posts 23-07-2018, 15:28
Replies: 130
Views: 22,793
Posted By zfyoung
According to some insider info. The schedule is...

According to some insider info. The schedule is from 20:25 to 18:05 (UTC). Main service area is North East China. Central and East China should also get good coverage.:cool:
Forum: Reception Results - Recent Posts 09-06-2018, 02:05
Replies: 171
Views: 26,372
Posted By zfyoung
Maybe the other non-DRM part is some kind of...

Maybe the other non-DRM part is some kind of digital mode(MFSK, PSK....) akin to the VOA Radiogram?
Forum: Reception Results - Recent Posts 05-06-2018, 02:24
Replies: 171
Views: 26,372
Posted By zfyoung
Thumbs down I'm afraid whether VOACAP can predict various DRM...

I'm afraid whether VOACAP can predict various DRM transmission coverage is moot here. Even the field strength at receiver site is NOT the determinate factor of a successful DRM reception.

From my...
Showing results 1 to 25 of 244

 
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