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Orban 2200
- Thread starter SFM-Ptgal
- Start date
I
ISUcyclone
Guest
I recently worked at a station with this processor. Anything questions in particular?
Thank you both for answering...
The 2200 is installed at the transmitter site, and the audio comes from 2 land lines (stereo pair) (No STL allowed). No previous processing installed. I have no way to test the audio prior the proceesing.
Audio description:
Sybillants distort... I've tweaked from 50 to 75 and nothing, they remained. The perceived loudness is low, comparable to a low budget italian singleband processor. The only thing I found good on the Orban at this stage is that theresn't any kind of pumping effect between the 2 bands, so it dosen't cause any listening fatigue.
When I see a graphic from the log recorder I see an inconsistent waveform with a wide dynamic and irritating peaks wich I suspect that are overmodulating.
Assuming that the engineer had made a correct setup, from where I should start from?
Pedro
The 2200 is installed at the transmitter site, and the audio comes from 2 land lines (stereo pair) (No STL allowed). No previous processing installed. I have no way to test the audio prior the proceesing.
Audio description:
Sybillants distort... I've tweaked from 50 to 75 and nothing, they remained. The perceived loudness is low, comparable to a low budget italian singleband processor. The only thing I found good on the Orban at this stage is that theresn't any kind of pumping effect between the 2 bands, so it dosen't cause any listening fatigue.
When I see a graphic from the log recorder I see an inconsistent waveform with a wide dynamic and irritating peaks wich I suspect that are overmodulating.
Assuming that the engineer had made a correct setup, from where I should start from?
Pedro
dspxscott said:1. Check the transmitter does not have pre-emphasis engaged because this could be causing the effect you mention. Are you using the MPX input of the TX?
2. Plug a known quality CD and player into the 2200, bypassing the telco line. This would be my first step.
Best regards
Scott
At this moment I can only answer to .1: Yes, it's using the TX MPX input.
The 2200 will produce very tight and consistent peak level control with no overshoots, so if there are overshoots there's something wrong with the interfacing to the TX (possibly the active stereo generator in the TX as Scott suggests) or the unit is bad (which is very unlikely). The same goes for loudness. 2200 is fairly loud, it can even sound louder than the 5-band units with some program material. Also, you shouldn't hear any obvious sibilant distortion unless there's something wrong with the setup (or the unit).
You should re-check the settings on the TX and the connection to the TX. Like Scott says, feed the processor directly with high quality audio, to see if the problem is ahead of the processor. Check the modulation level. Check the input level into the processor. It would be wise to load a factory preset for the time being, just to rule out possible maladjustments. But most likely, the problem is not the processor, but something else...
Regards,
Goran Tomas
You should re-check the settings on the TX and the connection to the TX. Like Scott says, feed the processor directly with high quality audio, to see if the problem is ahead of the processor. Check the modulation level. Check the input level into the processor. It would be wise to load a factory preset for the time being, just to rule out possible maladjustments. But most likely, the problem is not the processor, but something else...
Regards,
Goran Tomas
That is my thought. I used to work at an AM station and we moved the transmitter site. Couldn't get a good STL shot so went to phone line.
Due to the price we got an unequalized line and did it ourselves. A few old line caps and several days with a sweep generator and voila - sounds great.
The suggestion of bypassing the phone lines would be my first try. You need to find out which end the problem is coming from. Remember, garbage in = garbage out.
Good luck
Due to the price we got an unequalized line and did it ourselves. A few old line caps and several days with a sweep generator and voila - sounds great.
The suggestion of bypassing the phone lines would be my first try. You need to find out which end the problem is coming from. Remember, garbage in = garbage out.
Good luck
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