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VX-520U O
M
PERATING
ANUAL
I
C
-S
NSTALLING
HANNEL
TOPS
To simplify operation and prevent selection of unprogrammed/unused
channels or channel groups, tiny metal inserts or "stops" can be inserted
into the top panel beneath the CH selector knob. A tiny tab protruding
from beneath the skirt of the CH knob engages the stop(s) as it is turned,
preventing further rotation.
To insert a stop, rotate the CH knob to the channel "1" position and use
the Allen wrench to loosen the setscrew locate the CH knob, then pull off
the CH knob. Insert the stops firmly into the appropriate slot(s) for the
desired channels, using a pair of tweezers or fine needle-nose pliers, ac-
cording to the drawing below. For example, to limit CH selection to chan-
nels 1 - 4, insert one metal stop at the slot 15 (Low channel edge "channel
1" minus "two position"), and the other at the slot 3 (High channel edge
"channel 4" minus "one position"). When done, press the CH selector
knob back on the shaft, align the indicator of the CH knob to channel "1,"
then tighten the setscrew.
Note: The use of mechanical stops should not be used or relied upon as the
sole means to prevent selection or transmission on an invalid or unautho-
rized channel. Channels should be locked-out or TX-inhibited via pro-
gramming by your Vertex Standard dealer, and stops inserted as a operat-
ing convenience to you and your network users.
15
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