User Manual

DTC COMMUNICATIONS, INC.

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

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 video frequencies and their associated audio sub-

carriers. This 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

variations 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.

PROGRAMMING

Introduction

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!