Clear-Com WTR-670 - Manual (Page 26)

System Operation
Frequency Plan Overview
The WBS/WTR-670 has 36 factory-defined frequency groups
and 12 user-programmable frequency groups. A Group de-
fines the base-station transmit frequency and thus the receive
frequency on all the beltpacks. A Channel defines 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 frequencies
may be found in the “WBS-670 Menu Structure” and
“WTR-670 Menu Structure” instructions in this section.
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. A
limited number of channels 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) WBS-670 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
a unique frequency. For example, one WBS-670 could be set
on Group 02A and channels 01, 02, 03 and 04. The other
WBS-670 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) WBS-670 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
“WBS-670 Menu Structure” and “WTR-670 Menu Structure”
instructions in this section for details on how to copy and edit
frequencies.
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.
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 “IN” and “OUT” level controls in
the 12 o’clock position. Check that front panel IC is in
2-wire for AudioCom (Telex), RTS - TW and Clear-Com
wired systems, and 4-wire for Matrix and stand-alone op-
eration.
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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