Noise hunting

[tkerby]

I'm finding I'm getting exactly 100 triggers per second on the H field antenna and I think it's down to house wiring as turning it so that it's 45 degrees off parallel with the x and y axis of my house reduces the noise. The auto amplitude filter is effective and cancelling out +/-47 and +/- 141mV

Antenna is a coaxial möbius with a 50 turn transformer. Settings below. Any thoughts?

• ModeAutomatic, Noise Adaption, Amplitude Filter
  
• SignalsReceived: 396404, Good: 14969, Sent: 13692
  
• Signal RateLast second: 100, Last 60s: 99.6
  
• ErrorsNo GPS: 0, Overflow: 0
  
• StatusNormal
  
• Server , Region 1
  10.6MByte, 3% Compr., 13692 Packets, 812Bytes each
  

Amplifiers

Amplifier 1 - H0

• Channel A
  • Trigger-37mV/91mV, reached 20 times in last 15m, 54s
    
    
  • Gains10 * 10 * 40 = Total Gain 4000 | Relative Gain 6349 (99%)
    
    
  • Noise47mVpp
    
    
  • Lowpass Filter30.5kHz
    
    
  • Auto Ampl.Filter amplitudes around 47mV
    

Amplifier 2 - E0

• Channel A
  • Trigger-44mV/82mV, reached 95291 times in last 15m, 54s
    
    
  • Gains10 * 10 * 40 = Total Gain 4000 | Relative Gain 6349 (99%)
    
    
  • Noise35mVpp
    
    
  • Lowpass Filter30.5kHz
    
    
  • Auto Ampl.Filter amplitudes around -141, -47, 141mV
    

ADC

• Sampling per InputResolution: 12bits, Period: 666ns = 500.0kSPS, Time: 2000ns
  
• ADC1
  • Input1Amp-Channel 3 , Offset 27mV, no Trigger
    
    
  • Input2Amp-Channel 4 , Offset 19mV, Trigger -63mV/63mV
    
• ADC2
  • Input1Amp-Channel 2 , Offset 24mV, Trigger 0mV/0mV
    
    
  • Input2Amp-Channel 3 , Offset 27mV, no Trigger
    
• ADC3
  • Input1Amp-Channel 1 , Offset 27mV, Trigger -64mV/64mV
    
    
  • Input2Amp-Channel 2 , Offset -169mV, no Trigger
    
    

[BobW]

In many countries, 100hz is the power line zero cross (50hz) frequency. Maybecomputer / tv / whatever power supply

Power line itself shouldn't show up as 50/60 hz doesn't make it into the amp.

Start shutting stuff off until it goes away.

Also, please strip the server IP out of your post.

[BobW]

Oh. And mine looks bad today. Lawnmower got the cable to the antenna. Might actually look similar to yours, but at 60hz

[kevinmcc]

Try manual mode and adjust gains.

I use manual mode with Amplitude Filter.