79
(N1 × 100) / (N1+N2)
where N1 is the number to the left of the displayed slash, and N2 is to the right of the slash. For
instance, if the KAM Plus displays 1400/1800, the ratio can be determined by:
(1400 × 100) / (1400 + 1800) or 140000/3200 = 44
Since the total is 100, the ratio is then 44/56 and is within the 40/60 criteria.
If the ratio of the numbers exceeds 60/40, you should reset the internal Equalization jumper(s) for
partial equalization. If, with partial equalization these numbers are still outside the 60/40 ratio, set
the Equalization jumper for NO equalization.
Jumpers are appropriately labeled on the PC board. Refer to the parts location diagram for help in
locating them. Also refer to the Assembly and Disassembly section for information on obtaining ac-
cess to the interior of the KAM Plus.
Jumper K1 – VHF Equalization – This jumper is provided to alter the equalization characteristics of
the VHF modem. The KAM Plus is shipped with the jumper placed on ONLY ONE of the posts effec-
tively "OFF" so that full equalization is in effect. With no jumper installed on the 3-pin header, full
equalization is in effect. With the jumper connecting the center post and the post marked 1, there
is no equalization, With the jumper connecting the center post and the post marked 2, partial
equalization is in effect. Testing has shown that most VHF transceivers require that the input audio
signal be fully equalized for best performance. Should you wish to operate the KAM Plus in a hard
wire packet line, no equalization should be in effect.
v7.1
Jumper K1 – VHF Equalization – This jumper is provided to alter the equalization characteristics of
the VHF modem. The KAM Plus is shipped with the jumper placed on only one of the posts, effec-
tively provided partial equalization. Placing the jumper on both posts will set the KAM Plus for no
equalization. Most radios will work properly with partial equalization, however if the receive audio
is taken directly from the discriminator of your radio, no equalization will probably work better
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