User Manual

10
PROGRAMMING
Introduction
When you order a Derringer audio transmitter, DTC will factory program your
frequencies at no additional charge to you. You may want to place a sticker over
the rotary switch on the chassis so users in the field don’t attempt to change
frequencies. This is often the best path for state and local agencies with limited
frequencies available to them.
DTC will also provide you with free software and a free programming cable,
enabling you to change your transmit frequencies.This is ideal if you often work
with other agencies, or anticipate the equipment being used by a multi-jurisdic-
tional task force. You can program up to ten channel settings per unit. In general,
this allows you to program most variations you might encounter in the field at the
depot level. You will be able to program frequency, narrowband/wideband, AGC
enabled/disabled and scrambler ON/OFF.
As a practical matter, your Derringer transmitter’s frequencies will be dictated by
the frequency of your receiver and/or repeater. In many cases, these devices are
crystal controlled or have few channel options.
TIP: Make sure that you program your transmitter to match the frequencies
of your receiver, and test the components as a system prior to going into
the field!