Telex TR-825, BTR-800 dimensions System Operation, Frequency Plan Overview, System Quick Start

Section

7

System Operation

Frequency Plan Overview

The BTR/TR-8XX has 36 factory defined frequency groups and 12 user-programmable frequency groups. A Group de- fines the two base station transmit frequencies and thus the two receive frequencies on all the beltpacks. A Channel de- fines a base station receive frequency and thus a beltpack transmit frequency. A base station receive channel that does not have a frequency set for it will have a dash to the right of it on the Group/Channel select screen. Details on setting fre- quencies may be found in the “BTR-800 Menu Structure” and “TR-8XX Menu Structure” instructions in this section.

System Quick Start

Follow the list below to quickly get a base station and beltpack(s) operating. When completed the user should have a base station and 1 to 4 beltpacks up and running with full oper- ational ability. The base station will be on Group 01A with its four receivers on channels 01, 02, 03 and 04. Each beltpack will be on Group 01A with a unique transmit channel number matching one of the base station receive channels.

1.Plug-in the base station via the supplied power cord and connect the antennas. The color dots on the base should match the color rings on the antennas.

Factory-Defined Groups

The 36 factory-defined groups were carefully chosen to avoid certain intermod products and various other possible sources of interference. The Groups are set and cannot be changed. There is a limited number of channels which can be chosen from within these groups.

The first 24 factory-defined groups (01A – 12B) are “pair” groups that can be used for single (up to 4 beltpacks) and dual (up to 8 beltpacks) BTR-800 systems. They are arranged 01A, 01B, 02A, 02B…011B, 012A, 012B. A “pair” group, like 1A and 1B, have different base station transmit frequen- cies, however, they both have the same eight base station re- ceive channels from which to choose. Each channel represents

aunique frequency. For example, one BTR-800 could be set on Group 02A and channels 01, 02, 03 and 04. The other BTR-800 could be set on Group 02B channels 05, 06, 07 and

08.As long as the channels are different, everything should be fine.

The next 12 groups (13 – 24) are single groups that primarily are used for single (up to 4 beltpacks) BTR-800 systems. The number of channels from which to choose from in these groups will vary from group to group.

User-Programmable Groups

The 12 user-programmable groups are initially empty. The transmit and receive frequencies are fully editable within these groups. In fact, factory-defined groups may be copied to user-programmable groups and then edited if desired. See the “BTR-800 Menu Structure” and “TR-8XX Menu Structure” instructions in this section for details on how to copy and edit frequencies.

2.Base station rear panel switches: Transmit power set to High and on.

3.Ensure base station rear panel IC switch matches attached wired intercom system. If used stand alone or connected to a 4-wire system then IC switch position is Not Applicable.

4.Press [MENU] as powering-up the base station. This will place it on group 01A and set the receives on channels: 01, 02, 03, and 04.

5.Place the front panel IC A and IC B “IN” and “OUT” level controls in the 12:00 o’clock position. Check that front panel IC A and B is in 2-wire for AudioCom (Telex), RTS -TW and ClearCom wired systems, and 4-wire for RTS Matrix and stand-alone operation.

6.Place batteries in the beltpacks.

7.Remove the rear switch cover on the beltpacks. Set the beltpack rear panel slide switch to push-to-talk (PT TALK).

8.Press [MENU] as powering-up each beltpack. This will place the beltpack on group 01A with the channel 01 flashing.

9.Use the [UP] and [DOWN] arrow buttons to change the channel to match a channel on the base station. Then press [SET]. If leaving on channel, just press [MENU]. Each beltpack should have a unique channel number.

10.The group/channel on the beltpack should now match the group and a receive channel on the base station. Nothing should be flashing on the beltpack screens.

11.Plug headsets into the beltpacks and set the microphone gain so the BAT/OM LED will flash at the beginning of most words at normal speech levels.

DONE.

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