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1. What are the minimum requirements for DIRECTV approved cable? |
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B. RG6, 60% braid, 100% shielded, copper center conductor |
The cable must be RG6 or larger with a minimum of 60% braid, 100% shielded and have a solid copper center conductor.
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2. If you use existing Cable TV cable, which of the following may occur? |
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A. The LNB may not be able to switch |
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B. Loss of half of the DIRECTV channels |
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C. Significant signal loss |
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D. No picture |
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E. All of the above |
Cable TV may use RG59 or RG6 cable. Cable TV generally uses frequencies between 54 MHz and 750MHz. This is because external power supplies throughout the cable system power all active cable components. These lower frequencies and lack of voltage on the cable allow a cable TV company to use cable that may not perform with a satellite installation. If the wrong cable is used the voltage drop can be too severe. If there is only a 4-volt drop, the LNB will not be able to switch. That means you will not get half your channels. In addition, there could be significant signal loss.
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3. If the cable is bent too sharply, it could change the impedance and/or short the cable. |
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True |
The average bend should not be less than that of a 3-inch circle or it could change the impedance and/or short the cable.
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4. What should you consider when selecting the best location for the ODU? |
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A. Line of sight |
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B. Grounding location |
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C. Suitable mounting surface |
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D. Location of the DIRECTV receivers |
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E. Where you will route the cable |
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F. All of the above |
Line of sight, grounding source less than 20 feet away, suitable mounting surface, location of the DIRECTV receivers and where you will route the cable.
Hazards are created when the cable is routed across doorways and within walkways.
Select a location for the ODU that will allow you to keep the cable out of sight and protected.
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5. How far apart should cable clips be placed? |
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B. 18 inches |
18-inch intervals will hold the cable close to the surface and tightly to the building.
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6. You should never use metal staples or a staple gun to attach cable. |
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True |
Metal staples not only damage the cable, they will not hold up in weather like an approved cable clip.
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7. What should we do to stop moisture or water from entering the home through the hole we drilled? |
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A. Create a drip loop with the cable before entering the hole |
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B. Use bushings and silicone sealant |
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C. Route the cable below the hole |
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D. Drill the hole slightly smaller than the cable and force the cable through |
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E. A, B and C |
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Drip loops, bushings and silicone sealant prevent water from flowing down the cable and into the customer’s home. If bushings are not available, use RTV silicone sealant as a minimum.
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8. How do you know what is on the other side of a wall prior to drilling the hole? |
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B. Go outside and check, measure the exact location of the hole if necessary |
Always go outside and visually inspect the exterior of the wall. Measure the height and distance from a window, wall or fireplace on the inside and repeat the measurements on the outside to be absolutely positive that the drilling location is safe and will not cause any damage.
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9. What can cause damage to the cable? |
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A. Using metal staples |
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B. Hitting it with a hammer |
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C. Micro bends |
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D. Tightening tie wraps excessively |
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E. All of the above |
Using metal staples, tightening tie wraps excessively, hitting it with a hammer, micro bends, unapproved cable clips and more.
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10. Telephone junction boxes usually consist of two sections, what are they? |
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C. Telephone company use only and customer use |
Only connect to the side that says “Customer Use”. You should never splice the line directly. All phone lines should be run directly from the demark box.
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11. In almost all scenarios, you should drill from the interior of the home to the exterior. |
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A. True |
Always drill from the inside out and make sure you know exactly what’s on the exterior wall that you’ll be drilling through.
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12. In almost all scenarios, you should never drill through laminate or hardwood flooring. |
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A. True |
When possible, drill through an outside wall or do a wall fish.
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13. Every effort should be made to route cable so it is difficult to see and is protected from the elements. |
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A. True |
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Cable no matter how nicely it is run across a building, it is an eyesore. Do your best to conceal it when possible.
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14. Who needs to follow all federal, state and local codes when installing a DIRECTV System? |
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A. The installer |
You as the installer must adhere to all local, state and federal codes when installing a system. The NEC is superseded by any local requirements. There may also be restrictions placed by a home owner’s association.
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15. The ground wire should be run as direct as possible between the ground block and the ground source. |
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A. True |
