24
FIGURE 3
MotoSAT
Bulletin 010501
A/B Switches
Explanation: The practice of utilizing a mechanical switch (A/B
switch) to disconnect the roof mount antenna and connect to a
ground mount can cause problems. The problems are extremely
difficult to diagnose since symptoms can be related to many different areas. They will
often show up as:
a. Loss of one or more channels.
b. Loss of one or more transponders.
c. Not allowing the automatic system to find the satellite.
d. Freeze framing on one or more channels.
e. Lower than normal signal strength on one, several or all of the
transponders.
Solution: If you have an A/B switch in-line with your roof mount antenna (automatic
or not) and you exhibit one or more of the above symptoms, then bypass the A/B switch
and see if the problem goes away. If it does, remove the A/B Switch and find a way
NOT TO USE IT.
Call for more details or suggestions contact your MotoSAT dealer.
Product effected: All MotoSAT products and all satellite systems in general.
Problem: a. Insertion of A/B switch into satellite signal cable going to the roof mounted
antenna can cause selective dropping of channel frequencies.
b. Loss of certain channels can result. (Usually, but not limited to, Network Feeds
on DTV
)
.