Problem | Remedy | |
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| |
Noise bars are "rolling" up | Hum bars (ground loop) are caused by a difference in the ground potential of any two or | |
or down in the output | more devices connected to your signal path. This difference is compensated by routing | |
image | that voltage difference through any available interconnection, including your video cables. | |
or: |
| WARNING! |
Low frequency Hum in the |
| |
| Do Not disconnect the ground from any piece of video | |
output signal |
| |
| equipment in your signal path! | |
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| |
| Check the following to remove hum bars: | |
| 1. | Confirm that all interconnected equipment is connected to the same phase of power, if |
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| possible. |
| 2. | Remove equipment connected to that phase that might introduce noise, such as motors, |
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| generators, etc. |
| 3. | Disconnect all cables and reconnect them one at a time until the ground loop |
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| reappears. |
| 4. | Disconnect the affected cable and replace it, or insert an isolation device (opto isolator |
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| or transformer) in the signal path. |
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13.3Audio Signal
Problem | Remedy | |
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|
|
No audio at the output | 1. | Confirm that your sources and output devices are powered on and connected properly. |
device, regardless of input |
| Audio input of your Twisted Pair Interface should be properly wired to the output of |
selected |
| your source. Audio output of your Twisted Pair Interface should be properly wired to |
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| the input of your line amplifier or output device (recorder, display, etc.) . |
| 2. | Confirm that all devices in the signal path have the proper input and/or output selected. |
Audio level is too low | 1. | Confirm that the connecting cables are of high quality and properly built. |
| 2. | Check level controls located on your source input device, output display or recorder. |
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KRAMER ELECTRONICS LTD.
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