DTC COMMUNICATIONS, INC.
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Introduction
DTC has built in a lot of flexibility in the programming options you have on the VBL
and VBS series transmitters. You can choose to use some, all or none of this
flexibility.
When you order a VBL or VBS transmitter, DTC will factory program your frequen-
cies 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 frequen-
cies. This is often the best path for state and local agencies with limited frequen-
cies available to them.
DTC will also provide you with free software and a free programming cable,
enabling you to change your video frequencies and their associated audio sub-
carriers. This is ideal if you often work with other agencies, or anticipate the
equipment being used by a multi-jurisdictional task force. You can program up to
ten channel settings per unit. In general, this allows you to program most varia-
tions you might encounter in the field at the depot level.
As a practical matter, your VBL or VBS transmitter’s video frequencies and audio
sub-carriers will be dictated by the frequency and sub-carriers(s) 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
and audio sub-carriers or your receiver, and test the components as a
system prior to going into the field!
PROGRAMMING
