GAI-Tronics 701-302ICS ICS AC-Powered Page/Party Plug-in Amplifiers - Manual (Page 15)

Pub. 42004-730L2B
ICS AC-Powered Page/Party
®
Plug-in Amplifiers Page: 13 of 20
f:\standard ioms - current release\42004 instr. manuals\42004-730l2b.doc
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ALS Minimum Level
The ALS minimum level is the lowest speaker output level that the station will maintain. To set the ALS
minimum level, remove the amplifier from the enclosure and connect the maintenance cable (sold
separately). Turn R91 on the Main PCBA fully counterclockwise. Listen for a single beep from the
speaker indicating the speaker amplifier is in the Minimum Level Adjustment mode. If the page line is in
use immediately after the beep tone, the page signal should be used to make the minimum level
adjustment. If the page line is inactive following the beep tone, a continuous tone is activated to make the
minimum level adjustment. After the tone is activated, all page line activity is ignored until completion
of the adjustment.
This test tone is used as a reference to adjust the speaker amplifier output level to the desired volume.
Adjust R91 to the desired output. The test tone automatically shuts off 5 seconds after the last
adjustment. The factory default setting for minimum level is 4.0 watts nominal into an 8-ohm load.
ALS Offset Level
The ALS offset level allows the output of the speaker amplifier to maintain a set difference or “offset”
between the ambient noise level and the speaker output level. To set the ALS offset level, remove the
amplifier from the enclosure and connect the maintenance cable (sold separately). Turn R91 on the Main
PCBA fully clockwise and listen for the two beep tones indicating that the station is in the Offset
Adjustment mode. If the page line is in use immediately after the two beep tones are heard, the page
signal should be used to make the offset level adjustment. If the page line is inactive immediately
following the beep tones, a continuous tone is activated to make the offset level adjustment. After the
tone is activated, all page line activity is ignored until completion of the adjustment. Adjust R91 to the
desired offset level.
N
OTE :
This adjustment should be made under maximum ambient noise level conditions. The ALS offset
level must always be set higher than the ALS minimum level setting.
SmartSeries VLC Level
When activated, the VLC overrides the ALS minimum level setting allowing the speaker volume to
change to a preset level during an emergency page. To adjust the VLC Level, remove the amplifier from
the enclosure and connect the maintenance cable (sold separately). Force the station into the VLC mode
by having someone execute a page from a station programmed by the MCU to activate the VLC function.
During the page, turn the R91 control on the Main PCBA fully counterclockwise, and listen for two beep
tones through the page speaker indicating the VLC Adjustment mode has been activated. After the two
beep tones, turn the R91 control to the desired speaker level using the live paging signal to adjust the
level. The station automatically exits the VLC Adjustment mode and reverts to normal operation 5
seconds after the last pot adjustment.
N
OTE : The system must be equipped with an ADVANCE head end to activate the VLC function.
FSK Signal Gain
The FSK Signal Gain, R13 on the SmartSeries PCBA, adjusts the FSK transmit signal strength. It is set
at the factory and should not be adjusted by the installer.