Zephyr 700 - Manual (Page 9)

audio. Program audio that has no popping or static noise, but which is distorted (or is
the wrong level) does not come from the above areas. Distortion problems come from
audio processing circuits. This can be in the transmission processing, or the receiver
demod and audio circuits.
BACK INDOORS
When you install your 700 in the rack, the first thing you may notice is that the meter has
a lower reading than it did outdoors. The reason for this is that the metering circuit is
indicating the loss in your cable. Readjust the meter sensitivity to a center value and
make a note of it. If the value drops in the future, look for dish movement, ice or snow in
the dish, water in cables, etc.
Sun fades occur for periods of a few days in the spring and fall and last for a few
minutes. You can verify if this is your signal loss by looking at the sun shadow in the
dish. It will be dead center when this happens.
Notes on Cable: RG-59 cable is usually OK for runs up to 125 to 150 feet. Longer
runs require a heavier cable such as RG-6, or preferably RG-11. The DC resistance of
light duty cables eats up the supply voltage to the LNB on long runs. Any cable you use
must have substantial braid. Foil-only outer conductors are OK to run TV signals
around your house, but not much else. "L" Band line amplifiers can be used for long
runs between the dish and receiver. We have gone as far as 700 feet in special cases.
If you use cables other than RG-59, it is a good idea to use short jumpers of RG-59 on
the ends of the heavy cable. The "F" connectors that go on larger cables often have
such a big center conductor that they can stretch or damage the female connectors on
your LNB or receiver.
In cases of extreme RF fields, you may want to look at triple shield cable such as
Belden 9060. You can probably get some from your nearest Cable TV company if you
don't have a cable dealer nearby.
Installation MA700NST.SAM
SECTION 32