View Full Version : 9950 kHz AIR India Tests to Europe from Khampur
The Label was all I got this morning...
My antenna tuner was set to 6 MHz until 2226 UTC. :rolleyes:
This morning I started my PC too late, so the log is rather short. Just 13 minutes and 4% CDA.
Perfect reception but the audio level was much too high.
The last six minutes from this Japanese morning.
Good rf signal with changing snr:
Judging from Fritz' log, the reception is extremely good in Germany. I have no idea why I can receive this signal in Japan; it must be a side or back lobe and the window of reception is rather narrow.
@Terje: You simply know how to get the best result! :D
Today a lot of fading but good reception:
Hi Fritz and all,
Getting the best results - hm - I'm not sure about that. I am not even sure if the receiver I brought here is so very fantastic.
Extremely deep Fading here at my Japan location too this morning. Almost 19% CDA, but it would have been nice if those % would have happened around News time :rolleyes:
SF:104 A:8 SSN:61
I woke up early this morning only to find a OTH blocking the AIR frequency. :mad:
After 40 minutes of waiting the OTH stopped and the log did not get any longer than usual. :rolleyes:
Not worth listening today, pain in the ear, audio level far too high. :mad:
The engineers at AIR need a hearing aid! :D
Rightclick downloadable zipped MP3 recording attached:
The signal looks terrible tonight, very high intermodulation floor, only 20 db SNR!
I really wonder why there is obviously nobody responsible to avoid spoiling +/-40 kHz of the band even in Europe! :confused:
I was awake early and noticed some signal, so I started Dream. The result is the enclosed messy log. I checked the Mute Check Box in Dream in case some Hi-Fi audio might have interrupted my snooze. :D
7% CDA in this unattended log until QRT at 2229 UTC.
Nepali Service this time. The little audio I heard sounded quite good. But it was very little.
Nepali Service this time. The little audio I heard sounded quite good. But it was very little.
Many transmissions Yesterday had same banner Nepali service.
the service on15050 actually Sinhalese language, but banner as Nepali service. perhaps some error in banner section.
Back in Scandinavia and no reception at all... :confused:
... Or just some sporadic decoding tonight. Is the season over for India to Europe? :confused:
For some reason, DREAM lost the signal very often but my short log results in 97% CDA at least. By the way, it is good to hear that there weren't any audio-problems anymore. Actually, it did not sound like 20 kbps but at least was without any noise.
The first 21 minutes were fine, then suddenly the signal got weaker.
A test with DRM S/W Radio 2.0.38 on Windows 7.
Attached is a screenshot I took listening to RNZI on 9890 kHz.
There is a "little" difference in the linearity between VoR on 9880 kHz and AIR on 9950 kHz.
Also here in Dresden i see the wideband noise spectrum from AIR.
Mostly stable reception during the whole evening.
Studio modulation is a bit too narrow as always ;)
The log covers 199 minutes. Good, stable reception, but severe hum, at least when there is no audio present. Seems like they were pulling plugs from time to time tonight. The clock was correct, but the date was 5th April. Seems like this is a common problem as I have seen this error on RNZI too.
There is nothing wrong with the reception, but the audio source, like around 2030 UTC that was limited to about 2000 Hz, so the speech quality was next to nothing. :rolleyes:
Good, but not perfect reception this evening.
Pretty good reception, and the audio sounded better tonight.
Good reception last night.
273 minutes (or 4 1/2 hours) of perfect reception.
138 minutes (or 2h 18 min) of more or less perfect logging.
I noticed a TX break at 2045 UTC and around 1935 it seems like there had been another TX failure. Otherwise good reception.
I started the log after a TX break and the result was pretty good with almost 28 dB SNR at its best.
Good reception in this mostly unattended log.
Again, good reception in this mostly unattended log.
99% decoded audio in this 290 minutes long log. Only at the end around 2215 UTC there was a weaker period.
99.9% decoded audio in this 293 minutes long log. :cool:
Not so stable reception this time. 97.3% decoded audio in this 295 minutes long log. There was a 4 minutes TX break from 2146 UTC.
99.5% decoded audio in this unattended 295 minutes long log.
Continue with great signal here SNR:16dB, today noted with the name Vividh Bahrti, mote info about this service in http://en.wikipedia.org/wiki/Vividh_Bharati
Not so good here this evening. 94 and 93% CDA in these logs with a break for Nigeria.
PS: I forgot to say that the Russian Service changed to GOS IV two minutes into my first log.
4 hours and 44 minutes with 99.9% CDA. There was a 4 seconds long break of some sort at 1843 UTC.
Perfect reception from 1815 UTC. Generally a much lower SNR this evening.
More or less perfect reception.
257 minutes of near perfect reception.
Almost perfect reception and as far as I can hear, the audio is perfect too.
A 15 minutes break towards the end of this unattended log.
Despite the Doppler values this 280 minutes long unattended log was perfect!
I wanted to listen to the program but all i can attach is another example of air pollution. :mad:
Heard this last night, with Degen MS31 into Newstar DR111, audio had bad hum on it, had to fiddle around a lot with the aerial to decode audio, in UK
Good reception all tonight. With Newstar and Degen
Who do they expect to listen to this sh.t audio? :mad:
can't you ask them to monitor their transmission? :o
Groundloop hum and compressed/ clipped audio:
Better audio today! :)
1. The groundloop hum is down but still audible.
2. The air conditioning system is too loud.
3. There is still a lot of harmonic distortion on the obviously clipped audio level peaks.
Zipped MP3 recording attached.
Very poor reception tonight on Newstar with Degen , only decoded audio for short times, still bad hum on audio, do Air India think this is the best way to promote drm?
Good reception tonight, with Newstar and Degen De31 much better audio quality
Tonight on mt Newstar it says Russian Service, but no audio yet at 2107 utc
Good reception all last night on Newstar and Degen, audio quality could be better
Very strong reception on Newstar and Degen, but still suffers from earth loop hum on audio, audio quality should be better
Nothing at all last night, but when I listened on AM , I could hear analogue AIR, no DRM though
Just a short check on 9950 this morning to check if they were on the AIR :p
Worse this morning. Almost no signal at all.
Surprisingly good signal here last night. Some audio problems (like the very low audio level of the female announcer), otherwise good audio for a change with only a little hum sometimes. Perfect reception on the DR111 with the whip antenna too.
Very good reception last night too. Excellent reception but the bitrate could be lower, then it would have been perfect. I listened for an hour or so with the DR111 too (whip antenna, living-room), and there were almost no decoding problems at all.
Very good until the signal suddenly disappeared around 21 UTC.
Curious this evening. SNR between 4-5 bars on my Newstar. No drop outs so far. But odd background buzz sounding like an old DIN cord that hasn't been properly connected coupled with a high pitched slightly oscillating tone in the background. Thought DRM was meant to bring an end to all this. Clearly not.
My first log with the Newstar DR111. This is new to me, so I need to look into how you log, really. I thought I logged Nigeria too, but there is nothing there. Anyway, here is a bit of AIR with very good reception.
Good reception all evening with Newstar and PK loop, but there is still mains hum on the studio output, this should not happen with such a large broadcaster
Sometimes too low audio level, not possible to hear anything at all. Otherwise perfect reception on the DR111 whip antenna.
RF signal OK, audio not with groundloop hum.
Label said russian, but audio was english.
Strong signal and almost perfect reception. The label read "RUSSIAN SERVICE" but the programme was in English.
Two logs, one from the beginning and the second until the end with a break for VoN. There was a two minutes TX break from 1807 UTC.
Really good reception on Newstar much better audio, no mains him , really strong signal on whip aerial in UK
The label read VIVIDH BHARTI and it started out in English, but from 20 UTC it was Sinhala(?). My log was split up in two, as I looked for VoN at 1830 UTC, but I think they were off the air. Perfect reception on the built-in antenna.
I couldn't find VoN either, one could hope they are configuring their DRM modulator a little better
That was what I was hoping too! :D
A shorter log tonight. Not so good audio quality. Some hum and superimposed soumd.
Very strong reception last night hardly any breaks with Newstar and PKs loop
Perfect reception. I switched to VoN at 1830, but no signal - at that time.
Perfect except for a 20 minutes kind of black-out from 2130 UTC. Peculiar Doppler pattern from the beginning till the end. :confused:
Good continuous reception all evening, but they could improve the audio they send to the TX, nice music and news programmes
Virtually perfect reception last night here too, this time with my FRG-7700.
Perfect reception on the telescopic antenna this evening.
Good reception all last night
First part was perfect, the second part (after Nigeria) was not good at all. This must have been a propagation issue.
Again the first part was perfect, the second part (after Nigeria) was not so good with a few periods with audio drop-outs. This could have been a propagation issue.
Not worth to listen to as long as they do not eliminate this loud groundloop hum.:mad:
. . . but the audio level was so low so you couldn't hear the hum so clearly . . . :D
Again impressive audio quality tonight! :D
Zipped mp3 recording attached.
EDIT: Wow, now they turned up the audio, at least 30 dB clipping, terrible! :mad:
A little hum as always, but the reception was almost impeccable.
Playing with a new toy, works fine, but no log function.
Looks like the digital decoding successor of the Sat Schneider DRT1.
Had to cut a part of the gui to get the file below 100 kB.
The groundloop hum is still strong but at least the audio is stronger today.
Yes, a nice and steady hum in the beginning at least, later I was watching TV... ;)
Not so solid reception tonight.
Honestly to goodness, I had to cut the log short because of the racket they were transmitting. And in between, when there was no content aired they played "you were always on my mind", and that is a nice tune... at least if you listen to it without distortion. A completely un-enjoyable programme tonight. :rolleyes: :confused: :eek: :( :mad:
No problem with reception, but an evening of distorted terrible audio, AIR are a major SW broadcaster , do they not use PPMs or any sort of metering in their programme chain, so sad :confused:
The rf signal of AIR is one of the best!
...but the resulting audio reception is really disappointing! :(
Very good reception. I was doing something else, so I did not notice the audio quality tonight.
Very poor last night on Newstar with PKs Loop, poor SNR
The ionosphere is settling down slowly, but the DX conditions remain a bit battered... Only 87% CDA.
Wow this evening no mains him, good audio quality level a bit low, but SNR of 20dB and good audio, IBC effect? Thanks AIR
IBC effect, hi-hi, that's a good one! This log was definitely not the best, but the conditions are not so good either. The log was unattended.
Back to normal, mains hum on feed to TX and distorted audio, sadly, oh the signal strength was fine
Not so stable as it used to be... I stopped the log early.
Is it the seasons changing or what is happening? The hummy transmission is getting weaker...
A long TX break from 1815 - 1900 UTC. Otherwise hum, cross-talk and noise as usual... :rolleyes:
AIR and VoN are in a contest for the worst DRM audio ever! :D
A longer, about 9 minutes TX failure ruined this log. Otherwise nice hum and noise. :rolleyes:
Good signal, hopeless hum and crosstalk, seems like the transmitter is fed via a badly soldered phono connection! Do AIR actually check their output at all.:mad:
This is really ridiculous! I managed to stay on the frequency for 15 minutes. Distortion unlimited, getting so bad and over-driven so that the DRM modulator must have flipped out. Decoding became impossible despite a solid signal. There was only one option left: To switch off.
After the end of the english program I always wonder how they manage to produce this unbelievable DRM hifi sound quality then! :D
Yeah, like I said on Twitter: "Good (reception), but dreadful audio".
The audio level is far too high, and most of the time you can hardly understand anything of what they are saying. :eek:
Logged this with DReaM in "Linear", therefore no Doppler curve. The audio was OK only during the English service's sign off and the Hindi sign on, before and after the Audio input was far too loud, causing the usual distortion. Grrr... :rolleyes:
Quite a stable log for 84 minutes this evening. Not so much hum either.
Not stable at all tonight. And the Russian Service sounded very English to me. At least until 1945 UTC.
Good reception, less distortion but still mains hum sadly
Listening now at 1959 French language no mains hum and SNR of 21dB MER of 17dB not bad and much less distortion well done AIR
I switched off the sound, as I wanted to watch something on the sillybox instead.
Good reception after Taiwan 5 kHz up went QRT at 1800 UTC.
Very informative program tonight:
The content was readable tonight, but not at fm near quality.
AIR has provided a Reception reporting format in word format. It can be downloaded, filled and mailed to the address provided there in. this would help extending feed back , and perhaps one can suggest that they can also see the Rx reports across this site for the Indian Broadcasts and their quality. Hope it serves.
Strong reception in E Devon last night but very poor audio quality, very distorted, I will send in the form thank you
Reception is good, but now the rf signal looks very unsymmetrical all the time.
Useless to complain about the groundloop hum. :rolleyes:
A lot of hum during the English transmission. Good to fair decoding.
About 66% CDA in this 177 minutes long log. Max SNR was 23.27 dB at 20:35 UTC.
No use logging nothing, so this is the best part of this evening's log. The last hour of my log was the best - perfect.
Fair to poor reception, severe hum at times, especially before the English service. Sometimes there was hum with background audio. :rolleyes:
Better reception this evening. At the end of my log I noticed that the clock in Dream's Evaluation Log was about two minutes slow and the date was Sunday the 2nd December. This is the same problem as with R NZI: The weekday is wrong and the UTC clock is correct.
176 minutes log, max. SNR: 27.03 dB and 95% decoded audio.
99.7% CDA during the last three hours of this log. The day says Wednesday but the clock shows correct UTC (for Tuesday)
The reception as such was not too bad, but there was ONLY hum and no audio that I could hear anyway. :confused: :confused: :confused: :confused:
88% CDA of NOTHING at ALL.
Some audio in the beginning of my log. There was some Film Music with quite good audio quality.
This morning's result from the back lobe of the TX. Max. 15 dB SNR and 2.23% CDA. AIR insists on using a high bitrate, which is a disaster for the reception of their signal.
Good audio but there is hum in the background.
Traces of this QRG in Japan this morning on the back lobe (?) of the transmitter. Max. 10 dB SNR and no audio at all.
Not as good as it used to be in E Devon
Tuned in too late - some sound here this morning (24th local) in this mini-micro-log.
Enough signal to hear the news (with hum) this morning here! :)
More like "normal" this morning. Almost nothing decoded.
100% audio tonight .25dB SNR with little selective fading.
Hum in the audio would be less obvious with less or no compression
witch IMHO is useless in DRM.
Good, strong RF signal but terrible hum and distortion for 244 minutes. :rolleyes:
99.6% CDA. Max. SNR: 24.00 dB.
Same again this evening: Hum and distortion to high heavens. Propagation terminated the reception around 1945.
Just like in Japan, the last 30 minutes were the best... :rolleyes:
Good radio signal. Awfull audio quality
160 minutes of perfect reception but sometimes horrible hum, sometimes hum with background audio and sometimes again some audio almost without hum. :confused:
Max 29.68 dB SNR and 99.84% correct decoded audio.
Test transmission with a trial to mask the hum with 1Khz tone
It does'nt work :-)
25 dB SNR or HNR
177 minutes of nearly perfect (98.63% CDA) decoded audio this evening. It looks like that we have to cope with the hum from AIR. A (for me at least) record high max. SNR of 33.71 dB at 1914 UTC.
Very strong this evening 30dB SNR 100% audio
Solar wind speed: 612 km/sec, SF:113, A:28, K:4 and SSN:63
100% of awfull audio.
Saturated or/with hum.
29dB max SNR
96.6% CDA in this 96 minutes long log. Perhaps I should have logged 100 minutes? :D
Miserable audio with hum to high heavens. It is a pity that they expose themselves as poor promotors of DRM.
Strong signal but still receiving problems. I'm not sure what is the matter...
PS: One problem might have been a noisy 12 VDC power supply - at least it caused some noise.
98% CDA in this 222 minutes long log. Max SNR was 28.32 dB around 2051 UTC. The sound is still pretty awful at times. :rolleyes:
About 95.5% CDA tonight.
@tpreitzel: Ooops, I loaded a new DRM Plotter and forgot to adjust the compatibility settings in Windoze 7, but thanks for noticing. Now it should be OK. :o
About 95.5% CDA tonight.
Never mind ...
Only 80% CDA tonight in this 123 min. log. SNR peaked at 28.36 dB. Some of the program contents was without hum - for a change.
Almost no hum tonight.
Perfect reception 100% audio 25dB SNR
Perfect reception first, around 2030 the signal dropped, so I stopped the log.
About 99% CDA in tonight's log.
100 % of poor audio. Telephone quality with slight hum at best.
But with 48000 sampling rate.
Rise of the hum during silences is typical of too much compression.
It"s a shame that so few broadcasters are able to use the advantages of DRM.
As far as dynamic is concerned it is better than FM but so far it seems that
only VOR and Vatican radio noticed it.
About 96% decoded audio including a 3 min. TX break around 1810 UTC. Max. SNR was 32.26 dB SNR at 2111 UTC.
No hum tonight
In fact no audio at all .
Very ugly signal
No hum tonight
In fact no audio at all .
Very ugly signal
Last night (3rd April) there was lots of audio including some music that made me push the mute button. :p
About 99.9% decoded audio including a 1 min. TX break around 1942 UTC. Max. SNR was 31.99 dB SNR at 1824 UTC.
Very good reception this evening here and the sound was quite all right.
Perfect reception and then the signal disappeared - and came back later when I was writing the comments to today's previous logs.
99.8% CDA in this 166 minutes long log. 29.36 dB max. SNR.
Good reception last night in E Devon, still has hum all over the audio,
Strong signal, perfect reception here, hum is present almost all the time.
Strong signal, very good reception here with a few minor audio drop-outs, hum is present almost all the time.
Note: I added the screen shot of the test tone that was transmitted before the start of the regular programme.
Last night's log with 99.41% decoded audio.
Good reception, miserable audio - too high audio level, too much hum, too much distortion. Unfortunately. :rolleyes:
Almost perfect reception. Radio playing in the background, low volume, variety of speech and music. I did not pay much attention to the quality as I was in another room away from the receiver.
The use of 20.96 kbps and AAC+ to transmit audio limited to 5000 Hz is absurd to say the least. And the audio today was mostly a mixture of audio and superimposed audio from another source plus an annoying 1000 Hz tone, actually all at once. Pretty good decoding anyway, the signal is rather strong here now in the Spring.
Anyway, whatever - perfect reception...
Stable reception with almost 100% CDA.
Poor audio quality.
190 minutes of excellent reception. An unattended log.
235 minutes of excellent decoding. Another unattended log.
Very good reception in this unattended log from 13th May.
282 minutes of excellent decoding. Another unattended log.
Very good reception. An unattended log. 99.75% CDA.
286 minutes of excellent decoding. Another partly unattended log. The audio still needs attention regarding hum and crosstalk.
I am not sure what caused this log to look so bad... :confused:
Much better this evening.
Perfect decoding and high SNR, then a 4 minutes TX break at 1900 UTC. After the break the SNR decreased 5 dB - was that because they changed transmitter or the antenna? The same happened a few days ago. :confused:
Some problems last night. Low SNR compared to other logs.
A much better log this evening, but some hum is still present. The hum is probably a trade mark of AIR. :rolleyes:
Agreed reception not bad last night and still have the hum!
A short log with pretty good results.
Strong signal, 15 dB avg. SNR, absolutely no decoding. Even a re-start of Dream did not change anything. After 144 minutes of silence I gave up. :eek:
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