Jeremy
Active Member
- Joined
- Nov 28, 2013
- Messages
- 107
- Reaction score
- 52
- Country
- United States
- Dash Cam
- SG9665GC & Mobius 1
(Solution)
After my wife was almost hit by an illegal U-Turner, (clip here) I reviewed the video and discovered some audio issues with my SG9665GC V1:
There is a constant buzzing sound, and a cyclical brzzzp sound that repeats once per second in sync with the ticking of the seconds indicator in the on-screen time stamp. I assumed these were due to the power supply and/or cable, while some other folks suggested it was the GPS. After some testing, it seems suspected cause is responsible for one of the audio issues.
- First, I tried using different cigarette power supplies in-vehicle, but the same power cable. No change. However, once I unplugged the GPS, the constant buzzing stopped, while the cyclical brzzzp remained.
- Next, I brought the camera inside and tested with a 5v iphone USB power supply and a new short cable. Clean audio!
- Next, I went back in-vehicle and tried the short cable with my in-vehicle power supply. Clean audio!
- Next, I tried a new LONG cable (the 2nd one from a two-pack, from which the 1st cable is the one installed in this car). The cyclical buzz returned. With the video still recording, I plugged in the GPS and the constant buzz returned also.
So now I know the causes, the power cable and the GPS. But what to do?
- Do I need to look for a "shielded" cable?
- What about the GPS...? I don't have this issue in my second vehicle, which uses the same camera. May the power cable is aggravating the GPS cable somehow?
Short Cable, Clean Audio
Long Cable, Buzzy Audio (half-way through I plug in the GPS and the constant buzz kicks in)
After my wife was almost hit by an illegal U-Turner, (clip here) I reviewed the video and discovered some audio issues with my SG9665GC V1:
There is a constant buzzing sound, and a cyclical brzzzp sound that repeats once per second in sync with the ticking of the seconds indicator in the on-screen time stamp. I assumed these were due to the power supply and/or cable, while some other folks suggested it was the GPS. After some testing, it seems suspected cause is responsible for one of the audio issues.
- First, I tried using different cigarette power supplies in-vehicle, but the same power cable. No change. However, once I unplugged the GPS, the constant buzzing stopped, while the cyclical brzzzp remained.
- Next, I brought the camera inside and tested with a 5v iphone USB power supply and a new short cable. Clean audio!
- Next, I went back in-vehicle and tried the short cable with my in-vehicle power supply. Clean audio!
- Next, I tried a new LONG cable (the 2nd one from a two-pack, from which the 1st cable is the one installed in this car). The cyclical buzz returned. With the video still recording, I plugged in the GPS and the constant buzz returned also.
So now I know the causes, the power cable and the GPS. But what to do?
- Do I need to look for a "shielded" cable?
- What about the GPS...? I don't have this issue in my second vehicle, which uses the same camera. May the power cable is aggravating the GPS cable somehow?
Short Cable, Clean Audio
Long Cable, Buzzy Audio (half-way through I plug in the GPS and the constant buzz kicks in)
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