Also, more than likely the replacement will either have or develop the problem even, if the part is in it since the display board ground plane is not properly grounded by design.
SDS200 speaker pops at beginning and end of transmissions
- Thread starter Kaleier1
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If the hum was the main issue I'd open it and check for the part, but the popping doesn't seem to be a common issue here. Based on serial numbers it is likely it was installed at the factory. Also, since I am claiming defective due to the popping it will be free to ship back.
I will do the Static Discharge fix on the replacement if there is objectionable hum. Having done a search, I just don't see people having a problem with the internal speaker popping. I'd think with all the complaints of hum, if the popping was part of the hum issue, more people would have mentioned it.
I will certainly do that. It appears you are the only one here who has experienced the same issue so I know you are curious.
I've got a poppy internal speaker too (SDS200). It pops/clicks at the beginning of EVERY transmission. It even pops when the scanner lands on an encrypted TG and doesn't even pass audio. The pop exists on external speakers and headphones as well. I have my audio off time set to infinite. The next thing I will test is audio over ethernet. I have to assume it will not pop if I do that. It's annoying but not surprising because APX7000 radios have annoying pops every time the speaker opens. The APX8000 does not have the pop but there is a very low hiss every time the speaker is open. A way to test this is turn your volume the whole way down and you'll hear when there is traffic because you'll hear the faint hiss. My APX6000 has neither of these problems: no pop and no hiss but it doesn't have a loud amplifier like the 8000.
Edit: Further info on the pop
The pop occurs every time a key beep occurs and also every time I turn the audio from off to on (0 to 1). If a TG has back and forth conversation without going back into scan in the meantime, the pop does not occur each time a transmission occurs. The pop is clearly in the audio circuitry. It isn't something gone wrong, it's an artifact of the design of the unit.
Edit: Further info on the pop
The pop occurs every time a key beep occurs and also every time I turn the audio from off to on (0 to 1). If a TG has back and forth conversation without going back into scan in the meantime, the pop does not occur each time a transmission occurs. The pop is clearly in the audio circuitry. It isn't something gone wrong, it's an artifact of the design of the unit.
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Are you running a sds100/200 my bad I see you stated sds200! LOL!
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I too have a problem with a popping noise at the beginning and end of a transmission but only when using ear buds at night.
No popping noise from the internal speaker.
No popping noise from the internal speaker.
Can you post a video to Youtube of your unit receiving multiple transmissions (analog and P25 if possible) at a low volume (1-5) in a quiet room? I would like to confirm that the pop truly isn't there.
doctordialtone
Member
I just tried mine and it is the same, although I only get it when turn the volume from 0 to 1 or 1 to 0 while a transmission is going on. I also get it with the volume turned down to 0 when a transmission starts and stops.
If it is an artifact of the design, why aren't more people hearing it?
I am hypothesizing that every SDS200 does it out of the box. That's why I am asking for videos of people who claim their scanner is NOT doing it.
And thanks for your report. I don't have my unit out in front of me at the moment, but I believe going from 1 to 0 or 0 to 1 will make a pop on mine no matter if there is a transmission or not. Mine, too, will make the pop at the start of each transmission when the volume is set to 0. This makes me believe it is in the audio circuitry of the unit. I do not quite understand how those in line isolators will help, but if anybody has verifiable and reproducible evidence, I would like to see it.
doctordialtone
Member
According to Jon, in this case they won't help.
In my case - on a 996XT with external speaker - it eliminated the popping.
This is one of the reasons I don't promote the SDS scanners.
They haven't been completely invented yet.
Nope. Mine has no pops or any other audio artifacts.
Can you post a video to Youtube of your unit receiving multiple transmissions (analog and P25 if possible) at a low volume (1-5) in a quiet room? I would like to confirm that the pop truly isn't there.
But haven't people that have had the hum say it doesn't appear on recordings or in ProScan? Maybe the same with the popping?
Virginia STARS is P25, Shernandoah is analog. Recorded with ProScan via network streaming.
I've seen plenty of people indicate they hear the noise in headphone audio, and I've heard the noise in YouTube videos recording scanner audio straight from the scanner, so I don't think that's the case. My SDS200 doesn't have any hum, CPU RFI, or popping, so I can't test to confirm or refute that either way. What you hear in the recordings I posted is the same as what came out of the speaker, minus the room background noise.
The pop does not occur over network audio. Can you please just post a video of your scanner following the guidelines I set forth previously?
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None of the 7 SDS200 units (3 are mine, 4 setup for others) I have dealt with show any signs of popping, hissing, humming, or other extraneous audio artifacts.
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