View Full Version : Vatican Radio on 1530 kHz
Some interference from a very strong signal with a little bit too much bandwidth on the channel above (1539 kHz) until its closedown.
Roland
A bit of interference from the channel above as well as from distant thunderstorms.
Roland
Not so good due to thunderstorms around here.
For unknown reason, SBR was not used on this transmission but bitrate was nevertheless unchanged to the day before. Audio bandwidth was just 5 kHz.
Roland
A bit of fading at the beginning and still no SBR on last night's transmission.
Audio bandwidth is just 5 kHz.
Roland
Not bad.
But please switch SBR on again!
Roland
A strong signal and good reception.
SBR was again used for this transmission, very nice!
Roland
A strong and steady signal, very good reception.
Roland
A perfectly flat spectrum and a nice impulse response. Quite good. No idea what caused the dropout, most likely it came from a power line transient caused by someone switching something off or on.
Roland
Quite good again.
During the english broadcast, I heard a report about the transmitters and antennas at Santa Maria di Galeria. I was also stated that "Experiments in digital broadcasting technology are well advanced. So-called DRM promises to guarantee better audio quality at lower energy cost".
:)
Roland
FritzWue
21-08-2006, 09:31
Big difference between two antennas.
First 2x40m dipole 20m up with preselector and attenuator (no intermodulation!), then non direction optimized tuned shielded loop pointing south:
No DRM signal received after AM transmssions on 1530 kHz had ended.
Roland
Very good reception. The usual text message was not transmitted.
Roland
There seems to be a problem with the transmitter. SNR is low and the WMER vs carrier index plot looks rather strange, see screenshot.
The low SNR resulted in a lot of dropouts.
Roland
Back to normal today, well not quite, because transmission didn't stop at midnight UTC and there was also no audio after the italian programme.
Roland
FritzWue
30-08-2006, 07:06
A lot of interference:
Rather good. I had started logging earlier but then, the loop was detuned accidentally and there was local interference as well, so the result was not good, therefore I only post my report for the period during which the loop was properly tuned.
Roland
There was a bit of interference last night.
Roland
There was strong interference from my neighbour's lighting system which caused dropouts during moments of fading.
No problems even during fading, after interference had stopped.
Roland
Audio sounded dull with no SBR on this transmission.
Roland
Audio was back to normal with SBR added again.
Reception was a bit shaky with a bumpy spectrum, but signal became more stable and the spectrum turned more and more flat over the course of logging.
Roland
The signal became a bit weak a few times.
Roland
Rather good reception today.
Roland
Today, Vatican Radio's interval signal can be heard at low volume in the background, listen to the attached recording.
Update: The low volume background interval signal was a bit ahead of the real interval signal when the latter was broadcast after the end of the german programme. The background interval signal now continues during the english programme.
Roland
And here is my report.
The background interval signal is still audible on the italian programme.
Roland
A bit of fading. No interval signal in the background any more.
Roland
Quite good with a bit of fading.
Roland
Not a good result due to local interference from my neighbour's lighting system.
Roland
There were a few moments when the signal suffered from a bit of fading.
Roland
Again, a bit of fading caused a few dropouts. When I checked 1611 kHz for a few minutes after 22:00 UTC, I found that the signal was weaker than the one on 1530 kHz and that fade-outs were deeper there.
Roland
A bit shaky due to a weaker signal than usual.
Roland
There was only an AM transmission when I tuned in at around 22:15 UTC today.
Roland
Very good tonight.
Roland
Not so bad with some fading.
Roland
Signal strength was rising over the course of my logging period and at the end, the signal was stronger than usual.
Roland
A lot of fading and some distant on-channel interference at the beginning of my logging period. However, conditions gradually improved over the course of transmission and the signal became pretty stable during the second half of my logging period.
Roland
No DRM signal today when I tuned in at the time when transmission usually starts.
EDIT: When I tried again at 22:30 UTC, the DRM signal was there.
Roland
And here is my report.
Roland
Not bad but there seems to be a TX problem which limits SNR to just a little over 20 dB today.
Roland
A bit of fading. SNR is back to normal today.
Roland
Not bad but with some fading at the end of my logging period.
Roland
Transmission started about 10 minutes too late, right in the middle of the german programme.
Some fading during the second half of my log.
Roland
A very late start of the DRM transmission. When I tuned my antenna just before the start of my log, I also heard about 2 seconds (just a few words) of the german programme transmitted in AM, there should have been a DRM transmission then. Is the content server programmed wrongly?
Many dropouts that were caused by fading. Not a good result.
Roland
No problems with a late start but instead with a low SNR, not as a result of propagation but instead due to an obviously improperly tuned TX. I have already seen this strange WMER vs. carrier index plot on several instances in the past. Have a look at the screenshot.
Roland
A little bit of fading and co-channel interference last night.
Roland
Seems that no one was interested in that frequency since November ...
FritzWue
02-09-2007, 00:54
Conditions will come in wintertime.
Will wait for better conditions ...
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