GAI-Tronics 670-001 Explosion-proof Page/Party Speaker Station - Manual (Page 5)

Pub. 42004-161D
Model 670-001 Explosion-proof Speaker Station Page: 5 of 8
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03/04
Speaker Muting Information
This station is equipped with a muting feature that is used if the station is located near other
handset/speaker stations. This feature prevents acoustic feedback between stations during paging by
muting the station’s associated speaker. This station is shipped from the factory with the mute feature
enabled.
To disable the muting feature, remove jumper W6 located on the 10489-001 Termination PCBA. The
chart below describes how the muting function operates when specific combinations of wire jumpers W3,
W4, W5, and W6 are installed on the Termination PCBA.
W3 W4 W5 W6 Description of Operation
O X X X AUX/PAGE inputs to the amplifier are muted during station page (as
shipped from GAI-Tronics—see the note).
O X X O AUX/PAGE inputs to the amplifier are not muted during a station page.
O X O X PAGE input is muted only during a station page.
X X O X PAGE input is muted during a station page or by contact closure between
the Mute A and B inputs.
X O X X PAGE/AUX inputs are muted during a station page or by contact closure
between the Mute A and B inputs.
X O O O PAGE/AUX inputs are not muted. Isolated normally open relay contact
output between the Mute A and B terminals is closed during station
pages.
X = Installed O = Not Installed.
Mutual Muting
N OTE : Jumpers W4, W5, and W6 must be installed.
Stations that are located closely together may require mutual muting of the page amplifiers. To
accomplish mutual muting between stations, connect the orange (spare) wire in the GAI-Tronics station
cable to TB2-A on each of the Div. 1 stations that require muting. All the mutually muted stations are
muted when any connected station is paging.
Mutual muting can be accomplished between the Div. 1 stations and Div. 2 enclosures using most
GAI-Tronics 600 or 700 Series enclosures by connecting the orange (spare) wire between TB2-11(A) on
the Div. 1 station and TB1-7 on the Div. 2 enclosure:
Div. 1 Stations
(TB2-A) Div. 2 Enclosures (TB1-7)
670-001 702A 733-001 703A
780-001 732-101 7335-001
7805-001 7325-101 758-001
Consult GAI-Tronics for any enclosures not listed.
N OTE : The auxiliary speaker amplifier input is a balanced 10 kilohm audio input.