Specifications

Note for Figures 10–12: The graphs show the variance in squelch sensitivity with
turns of the Squelch control. A fully counterclockwise rotation is indicated by 0,
and a fully clockwise (two turns) rotation by 10.
20
adjustment is set between 1 and 1-3/4 turns clockwise (Fig. 12). When in the “ON”
setting mode, the background noise should be suppressed. If you turn the control
two turns clockwise, you will decrease your receive range dramatically (Fig. 12).
The divers will have to stay within a few feet of each other. If the mission requires
long-range communication, the squelch should remain off. Squelch is turned off
by a full counterclockwise rotation (where the squelch control cannot be turned
any further). CAUTION: Do not force the control past the stop point, or damage
will occur!
Remember, the more squelch you apply, the less range you can expect. When
possible, use the transceiver in the squelch “OFF” position. The following graphs
will give you a visual of the squelch settings.
If you are using a Super Mic
®
in combination with a KMDSI M-48 SuperMask
®
,
your transmissions may be sporadic (see Section 5.3, Helpful Hint #13). If you
experience this problem, adjust the squelch level to a higher sensitivity. Although
more ambient noise may be heard through the receiver, the speech signal will be
more likely to activate the receiver squelch consistently, resulting in unbroken
speech. If you absolutely need unbroken communication, disable the squelch (fully
counterclockwise rotation of the squelch control).
0 1 2 3 4 5 6 7 8 9 10
Note: Not recommended; may disable communications from divers and/or
surface.
Graph shows squelch setting at 2 turns clockwise.
Figure 12
0 1 2 3 4 5 6 7 8 9 10
Graph shows squelch setting at 1-1/2 turns clockwise.
Note: Factory setting. Should work well for most operations.
Figure 11
0 1 2 3 4 5 6 7 8 9 10
Graph shows squelch setting at 1 turn clockwise.
Figure 10