RS-485 TEST
Posted: July 30th, 2014, 10:10 am
If you read voltage (RS485 + / - Port from back of DVR) difference from voltage meter while DVR is sending signal (focus, zoom, etc), you will read around 2.2v - 2.5v.
Normally, RS485 signal is measured by Oscilloscope which is much accurate. The voltage range is around 4 - 4.5 v from oscilloscope.
If you can't read voltage range from DVR, you need to contact tech support.
Normally, RS485 signal is measured by Oscilloscope which is much accurate. The voltage range is around 4 - 4.5 v from oscilloscope.
If you can't read voltage range from DVR, you need to contact tech support.