(5) Signal compatibility.
This is the compatibility of the
modulation, bandwidth, and enemy signal type.
vegetation affect the considerations that apply to jammer selection.
Control Mechanisms. These are established to ensure the success
and the direction of jamming against high-value targets (HVT).
a. Positive control mechanisms ensure that the mission may be
stopped at any time.
(1) The positive control list is a publication of authorized
frequencies that can be jammed.
(2) On-off control is a centralized method of controlling
It provides for the immediate initiation or stopping of
b. Negative control mechanisms protect specific frequencies from
being jammed, except as authorized on a jamming restriction list.
This method of control is executed through the development of
separate listings of frequencies that are under any of the three
classifications of frequencies.
(1) Taboo frequencies are never to be jammed for any reason.
However, they can be time-controlled, and the jamming restrictions
may be removed during particular time periods.
(2) Protected frequencies are those frequencies used or
designated for use by friendly forces for a planned or on-going
operation. These frequencies are published in a protected frequency
(3) Guarded frequencies are listed as enemy-used frequencies
exploited by friendly force ESM or signals intelligence (SIGINT).
Guarded frequencies can only be jammed when the potential operational
gain outweighs the value of the information they provide.
c. A combination of negative and positive controls can be used to
keep jamming missions under control.