Programming
A. Normal Background Noise Environment
1.
Under normal background noise levels, set the
Paging Volume
control so that the page may be heard as
required. Then set the
Talk Back Volume
control in the middle (12 o’clock) position.
2.
Test talk-back to be sure that the
HF-3W
will switch between paging and talk-back for your desired operating
distance and noise level.
3.
Adjust the
Talk Back Volume
control as necessary for your environment. The louder the background noise
level, the more you have to decrease the
Talk Back Volume
and the shorter your talk-back distance will be.
B. Loud Background Noise Environment
If the background noise is too loud for the
HF-3W
’s VOX circuit to operate properly, you will need to add a “push-
to-talk” button across screw terminals
9
and
10
, and remove shunt
JP2
. The “push-to-talk” button may be installed
at either the telco end or the speaker end. Use a normally open switch for the telco side or use a normally closed
switch for the speaker side.
3
Operation
When sitting idle, the
HF-3W
allows audio from a background music source or an existing paging system’s speaker
output to pass through to the paging horn.
Handsfree talk back paging is achieved by either accessing the two-way paging port, accessing the unused trunk
port, or coming off-hook on the single/multi-line phone. At this time, the background music is muted, a page alert tone
is given and paging with talk back is enabled.
C. Two-Way Paging Port Interface
If the
Paging Input
is to be connected to a paging port, the paging port must allow two-way talk path and provide
a contact closure during paging. Disable the Talk Battery by removing the
Talk Battery Shunt
(
JP1
) before con-
necting to the paging port.
D. Page Alert Tone
If a page alert tone is not required, set the
Alert Tone Volume
to minimum (see diagram on page 2).
