Waiting for a reply is probably all you can do unless you just power them up and test them yourself.
I appreciate that, Mooly, I just haven't got round to it! But shall do shortly. I just wanted to ensure I was getting, from the supplier, what was needed - and they seem to be playing ball so that's positive - in a way! But no results from J.T. yet.
Off to North Norfolk on Saturday where there's no internet connection. Back in the New Year.
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Michael
More observations: If you look at OC-0809 pdf there the unit is a combination of TX and RX. The pin-outs conform to what I now find measuring the properties of the OC-0803 in the LA-ADAT in situ and comparing it to OC-0809:
0803 RX pin 1 = 5.03VDC - 0809 RX = Vcc
0803 RX pin 2 = GND - 0809 RX = GND
0803 RX pin 3 = 0.0007VDC 0809 RX = Vout
0803 TX pin 1 = 0.0098VDC 0809 TX = Vin
0803 TX pin 2 = 5.03VDC 0809 TX = Vcc
0803 TX pin 3 = GND 0809 TX = GND
Now to find a source of 5.03VDC. For this I use a spare PC Power Supply with two leads shorted to turn it on. I will Post the results of all four new OC-0803 . . . .
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Michael
0803 RX pin 1 = 5.03VDC - 0809 RX = Vcc
0803 RX pin 2 = GND - 0809 RX = GND
0803 RX pin 3 = 0.0007VDC 0809 RX = Vout
0803 TX pin 1 = 0.0098VDC 0809 TX = Vin
0803 TX pin 2 = 5.03VDC 0809 TX = Vcc
0803 TX pin 3 = GND 0809 TX = GND
Now to find a source of 5.03VDC. For this I use a spare PC Power Supply with two leads shorted to turn it on. I will Post the results of all four new OC-0803 . . . .
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Michael
Your just going to have to try it yourself and see 😛
Your showing the pin outs are different between the two here and so I would advise sticking say a 150 or 220 ohm resistor in series with your test supply initially to make sure the device being tested wasn't pulling to much current (indicating an incorrect connection).
Simples 😀
Your showing the pin outs are different between the two here and so I would advise sticking say a 150 or 220 ohm resistor in series with your test supply initially to make sure the device being tested wasn't pulling to much current (indicating an incorrect connection).
Simples 😀
With my 5.4VDC ex- PC PSU I have applied to pins 2+ & 3- Three of them light but the third one doesn't. It couls either be defective or it's s RX OCE. There's no test for a RX OEC that I know of. But I'm progressing!
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Michael
Those that light have to be trx's of course. Try powering the unlit one and measure the voltage on the output pin. Connect an optical input and see if the voltage changes.
Thanks, Mooly. One thing I have been misleading myself (and you) with - the Output of my PC PSU is 5.014VDC NOT 5.4VDC!!! Sorry! But there is a strange thing happening here. On this LS-ADAT Card there are now only one TX and one RX OEC. Applying the 5.VDC to the TX pins on the PCB it doesn't light. Applying power to pins 2 (GND) and 3 (Vout) of the RX OEC, the TX OEC flashes temporarily.
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Michael
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5 vs 5.4 volts shouldn't make a difference to anything.
I'm not really following the last part tbh 🙂 All sorts of strange things could happen if you backfeed a supply onto a PCB. I thought we were just trying to ID rx from tx on the four supplied replacements by feeding those with a supply.
I'm not really following the last part tbh 🙂 All sorts of strange things could happen if you backfeed a supply onto a PCB. I thought we were just trying to ID rx from tx on the four supplied replacements by feeding those with a supply.
Yes, you're right, Mooly. We are testing for RX and TX. This was an off-the-cuff test. The LS-ADAT is a 'satellite' attachment to the LynxTWO-A card from which it is powered. This 'test' was conducted on the workbench out of the PC and with no power therefore to the LS-ADAT card. Since there are two OEC's soldered into the ADAT card I thought it an interesting experiment to apply the 5VDC direct to the correct OEC contacts at their soldered pins. That was the result of that strange test. The result from testing the four new OEC's was that all four turned out to be TX OEC's. Since I need two TX and two RX is why I am in contact with my supplier in China. She's trying to help. I've even sent her the Link to JyeTei in the hope she can read and interpret their Chinese info. I dare say you have opened the JyeTai web link I posted and can visualise my problem. Only their OC-0809 PDF has any reference to RX. and that is because it is a two-in-one connector.
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Michael
I can not really add much more I'm afraid. You are just going to see what info you can come up with or take the plunge and one in and see if it works.
Thanks, Mooly. I have already tried putting the LS-ADAT card back in the Studio PC with just one original TX and one original RX OEC on board and soldered in. Booting that PC shows no red glow from the one remaining TX OEC. This is why I think there's a problem. That one remaining TX has not been out of the LS-ADAT card and is still firmly glued in place. Maybe I should remove that TX and replace it with one of the new TX OEC's - and go on (if possible) from there.
Happy Christmas. Off to Norfolk tomorrow when we shall use our new Dart X-ing facility for the first time.
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Michael
Have a great time.- Status
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