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| AM Stereo (C-QUAM) https://forums.stereotool.com/viewtopic.php?t=5895 |
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| Author: | Ken [ Thu Jan 22, 2015 10:51 am ] |
| Post subject: | AM Stereo (C-QUAM) |
Hi, How do I best setup StereoTool (7.60) for AM Stereo, do I use the "normal" output? Te transmitter I have ia a "ASMAX1 -B" from ASPiSYS. All tips are welcome. Thanks! |
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| Author: | hvz [ Thu Jan 22, 2015 11:27 am ] |
| Post subject: | Re: AM Stereo (C-QUAM) |
Hi Ken, You can use the (in this case not properly named) FM output for this, it has tilt correction and normal output does not. |
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| Author: | Ken [ Thu Jan 22, 2015 11:33 am ] |
| Post subject: | Re: AM Stereo (C-QUAM) |
Quote: Hi Ken,
Hi, You can use the (in this case not properly named) FM output for this, it has tilt correction and normal output does not. But that's MPX out? C-QUAM is L+R and L-R (phased 90°). My transmitter has "normal" Left and Right inputs. /Ken |
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| Author: | hvz [ Thu Jan 22, 2015 11:55 am ] |
| Post subject: | Re: AM Stereo (C-QUAM) |
Not if you don't turn the FM settings on! |
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| Author: | Ken [ Thu Jan 22, 2015 11:57 am ] |
| Post subject: | Re: AM Stereo (C-QUAM) |
Quote: Not if you don't turn the FM settings on!
I just discovered the new "AM Transmitter" tab, I will give it a test. Thanks!
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| Author: | nickstr [ Thu Jan 29, 2015 2:34 am ] |
| Post subject: | Re: AM Stereo (C-QUAM) |
I am currently working on my own AM stereo preset as is. Still a work in progress but I mostly have it nailed down except for some treble overshoots if natural dynamics are used. |
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| Author: | Ken [ Thu Jan 29, 2015 10:01 am ] |
| Post subject: | Re: AM Stereo (C-QUAM) |
Quote: I am currently working on my own AM stereo preset as is. Still a work in progress but I mostly have it nailed down except for some treble overshoots if natural dynamics are used.
Hi "nickstr". I you want to share I be happy to test your preset. What transmitter do you use? /Ken |
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| Author: | nickstr [ Sat Jan 31, 2015 5:21 am ] |
| Post subject: | Re: AM Stereo (C-QUAM) |
I am using a kit built AM stereo transmitter known as the Cuff Transmitter after its designer. This one is largely no frills and is only available in limited numbers on a sporadic basis. I can share my presets if need be but they might be retooled for the new version after I update my radio station computer. |
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| Author: | kyanox [ Thu May 28, 2015 9:48 pm ] |
| Post subject: | Re: AM Stereo (C-QUAM) |
So, just to verify. I plug the soundcard output left and right from my output machine to the transmitter left and right but don't enable FM mode. Then enable AM and it should send out C-Quam over left/right? Do I need to do any conversion? My AM TX says 600 ohm, and im coming out of a standard sound card directly to the TX. |
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| Author: | nickstr [ Mon Jun 08, 2015 9:58 pm ] |
| Post subject: | Re: AM Stereo (C-QUAM) |
You actually need a special transmitter to operate with AM stereo. The reality is that AM stereo requires two different types of modulation in order to function correctly not simply a sub carrier like FM stereo. It cannot be generated by a sound card alone but Stereo Tool can provide the appropriate processing that AM stereo transmitters require. A critical thing I can say is DO NOT MODIFY YOUR TRANSMITTER! In the US this voids your authorization to operate a formerly part 15 legal transmitter. You will need a new transmitter in order to operate in stereo but I can recommend one that is in production today. |
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