Aurora Multimedia VR-1FF - Manual (Page 11)

12.0
Random noise in video image
White noise
Hum on all channels
Ghosting
No Communication
‘ERROR’ is always received
Troubleshooting
TV Tuner
RS-232
- Check antenna position or cable connection. Weak signals can
cause noise. Use of an RF Signal amplifier may help. Check the TV Source setting in the menu for
proper selection between broadcast, cable, IRC, and HRC.
- Check antenna position or cable connection. Check the TV Source setting in the
menu for proper selection between broadcast, cable, IRC, and HRC.
- Poor grounding will cause this problem. The cable feed should be grounded
at entry into building or house structure. Jensen Transformers model VR-1FF CATV Ground Isolator
may also do the trick if the ground problem can not be found.
- Check antenna position. Sometimes to much gain from the cable source can cause
this type of problem. Radio Shack sells 3dB and 6dB attenuators that might help.
- Make certain PC or control device is set to 9600 8N1.
- Some terminal programs send both carriage return and line feed (0Dh,
0Ah) when the enter key is pressed. Make certain it only sends carriage return (0D hex). When writing
code try to put a 0Dh 100ms before sending a VTune command to make certain the buffer is
empty.
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