Cable-Tronix CTADM-806 User manual

CTADM-806 Installation Manual
This Package Contains:
One CTADM-806 Rack Mount Agile Audio/Video Demodulator
One Installation Manual
Product Diagram and Description:
Hardware Connections:
1. The CTADM-806 is designed for installation in a 19” rack.
2. Connect a 75ohm coaxial cable with F-Connectors from the CTADM-806’s RF Input port
to the Off-Air antenna or other source.
3. Connect a 75ohm coaxial cable with F-Connectors from the CTADM-806’s Audio Output
port to the modulator’s Audio Input.
4. Connect a 75ohm coaxial cable with F-Connectors from the CTADM-806’s Video Input
port to the modulator’s Video Input.
5. Connect the CTADM-806 to an appropriate power source capable of powering this
device. Be certain that power source is capable of handling the load if the CTADM-806
and other equipment are being powered by it.
Channel Selection:
1. The CTADM-806 can demodulate audio and video signals from any CATV channel from 2
to 125 or any Off-Air channel from 2 to 69 in the 54 MHz to 806 MHz frequency range. If
demodulating a signal from an Off-Air channel press the ANT/CATV Button so no dot
appears in the LED Channel Display. If a CATV channel is to be demodulated then
press the ANT/CATV Button so a dot appears in the LED Channel Display.
2. Set HRC/STD/IRC Switch to STD unless your signal source is HRC or IRC.
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3. Use the Channel Up / Down Buttons to select the Off-Air channel (or channel from some
other source) to be demodulated. For example, assume Off-Air channel 8 needs to be
demodulated and reassigned to CATV channel 35. In this example use the CTADM-806’s
Channel Up / Down Buttons to select channel 8. Remember, if an Off-Air channel is to be
demodulated then a dot should not appear in the LED Channel Display.
4. Push the CTADM-806’s Channel Lock Button to lock the channel selection and prevent
any accidental channel change.
5. Go to the modulator.
6. Set the modulator to CATV mode.
7. Set the channel on the modulator if an agile modulator. If a fixed frequency modulator,
ensure the output channel is correct. In the example above, the new channel would be
channel 35. You should then see Off-Air channel 8 on CATV channel 35.
RF, Audio and Video Level Settings:
1. RF input level should be 8 dB for optimum performance.
2. Audio level setting from the CTADM-806 should be 0 dB. Adjust as necessary
3. Video level setting from the CADM-806 should be 140 IRE or 1 V Peak-to-Peak. Adjust as
necessary
4. If the CTADM-806 audio and video levels are in spec, but audio volume and video
brightness need adjustment then those adjustments should be made at the modulator, not
the CTADM-806.
Trouble Shooting and Trouble Prevention Tips:
1. Ensure you are using quality cables with radial crimp or other compression F connectors.
2. Ensure the F connector’s center conductor is making solid contact with the CTADM-806’s
RF-Input, Audio Output, and Video Output connectors.
3. Make sure the ANT/CATV Button is set appropriately when assigning Off-Air or CATV
channels for demodulation. Selection should be done as:
• Off-Air channel to be demodulated NO DOT in the LED Channel Display
• CATV channel to be demodulated DOT in the LED Channel Display
4. If the CTADM-806 is not receiving power make sure the power cord is firmly connected to
the power source/outlet. Be sure the power source is properly rated to handle the
CTADM-806 load especially if other equipment is being powered by that same source.
5. If the CTADM-806 is receiving power but no signal, check to be sure the video/audio
source cable (e.g., Off-Air antenna) is firmly connected to the CTADM-806’s RF-Input
connector.
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6. A snowy picture may indicate the need for more gain, or in the case of an Off-Air antenna
possibly a larger antenna. Make adjustments consistent with design specs using
appropriate test equipment and the modulator’s RF level control.
7. A picture with sparkle may indicate too much gain. Make adjustments consistent with
design specs using appropriate test equipment and the modulator’s RF level control.
Further troubleshooting assistance can be found on-line at www.northamericancable.com in
addition to support from Cabletronix’s sales engineers at 1-610-429-1511.
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