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Model 13352, 13362, and 13372 Addressable Amplified Speaker Assemblies
Pub.: 43004-030A
d:\radio products-draft\gtc 43004\43004-030a\43004-030a.doc
06/05
2-Tone Signaling
In this operating mode, the speaker assembly detects preprogrammed 2-Tone signaling codes. The 2-
Tone protocol is one frequency followed by a second frequency, and is programmed via the CARD Suite
software application. If the 2-Tone code is blank, the unit will not have this operating functionality.
Volume Adjustments
The speaker assembly volume can be adjusted by two methods: remote volume adjustment and optional
local volume adjustment. The default volume level is programmed through the CARD Suite software
package.
Remote Volume Adjustment
The remote volume adjustment is performed through the use of DTMF control only. The speaker
receives the audio level from the DTMF signal and delivers a 1-kHz signal to the speaker output
corresponding to the volume level defined. The PTT of the transmitting device (radio, remote controller,
etc.) must be activated during the volume adjustment process.
The protocol for initiating remote volume control is: the speaker’s individual identification access code,
followed by a “#” to activate the unit, and then an “*” to enter the test tone mode.
After the “*”, a test tone is generated for a time period that is preprogrammed via Card Suite. During the
test tone, the volume level can be changed by increasing or decreasing the setting by one step. Press “*”
to increase or “#” to decrease, without entering the assembly identification code.
If the unit receives another DTMF code that is not “*’ or “#” (or no input) during the test tone, the
assembly stores the value in memory and returns to sleep mode. This stored level is used as a reference
for incoming audio signals and the appropriate gain required in the automatic gain control (AGC) circuit
for stable output volume level.
Local Volume Adjustment
Local Volume Adjustment is available through the use of an L-pad connected to the speaker output
(Model 12506-001). No test tone is generated during this adjustment, and the user must generate audio
for this test while adjusting the L-pad.
This is a passive adjustment. The maximum output level is defined by the CARD Suite program or by
Remote Volume Adjustment. The Local Volume Adjustment can only adjust the output level lower than
the maximum programmed level.
