Alcyone

Perhaps that’s the case. I’ll start over.

I’m trying to transmit some text to my radio and keep my stereo sound the way it is. Is there a way to do this? My transmitter has programmable RDS on the front panel.

Thanks

Hi thanks for the responses.

My transmitter only has an analog 1/8 inch input for audio and an 1/8 inch input for the mic. The mic input is unused.

My motherboard is a gagabyte GA-X58A-UD3R with an Intel chipset. I’m running windows 7 professional 64 bit.

I don’t know what specific model the Realtek HD audio is, but Speaker Properties in windows show the output as being 192000 Hz capable, which it is set at. It’s currently running at 16 bit but the output is 24 bit capable. This output goes direct to the transmitter.

The input sound card (which I’m using the stereo mix from) is only 92000 Hz capable.

I was able to get the RDS light on a car receiver to flash repeatedly before it showed all blanks as the text, but the sound was in mono and I was never able to get further than that.

Can RDS be passed through the regular analog input to the transmitter?

I used a 100 kohm resistor and got what I believe to be more accurate results. I think I’ve got the tilt set correctly now, but when I get the quick sweep wave looking like it should, it results in distorted highs and no mids or lows. Do I need an oscilloscope for this?

I was able to use the parallel port to generate a square wave and calibrate my input accordingly (it was off by 2 for the tilt).

However, when I use the probe I created (with the 1 megaohm resistor) on the output to the exciter, I get strange results. Using the quicksweep wave and getting it looking like it should results in harsh, crisp highs, no mid range and a tiny bit of bass. This is after getting the tilt set correctly.

Does anyone know why this is?

Thanks very much for the response; however I’m not sure I understand. My audio input is internal and the only thing I’m trying to calibrate is the output going to the exciter. The problem is, the defaults in breakway yeilded a total lack of midrange, only a tiny bit of bass and saturated hights (crisp and crackly). Cranking up the PEQ seemed to correct this, but I had to go by ear and I’m not sure it’s spot on just yet.

My setup consists of a machine with 2 sound cards. One sound card has the stereo mix enabled to act as the internal audio input and the other sound card is the output to the exciter and runs breakaway’s compressed audio. So there’s only one output to deal with. However, I have a completely separate computer that does nothing but run the calibration tool and isn’t part of my radio station. I’m just using it as a measurement tool to fix my audio issues.

What I did is run a straight audio cable going from the analog output of the soundcard that runs my exciter (and breakaway’s audio) to the analog input of the separate machine with the calibration tool. Are you saying the input jack on the calibration tool machine will somehow skew the results?

Using this method, I was able to adjust the tilt in breakaway while monitoring the square wave in the calibration tool running on the separate computer. I then came up with a value of 88 to get an almost perfect square wave. Is this result unreliable?

Thanks again.

If anything I’d say there’s a slight saturation of HF, but it’s tolerable. I remember when using my spectrum analyzer the PEQ settings mostly affected the areas of loss (mid range) without blowing highs and lows out of proportion.