Ampcontrol VAA, User Manual

Page: 40 / 81

VOICECOM USER MANUAL ISSUE 4
-38-
Table 14 - VAA Programmable Settings
Display Meaning Values Description
MD VAA Mode
VCA
or
---
If connected to a VoiceCom system this setting
should be set to
VCA
. If set to
---
the VAA will not
respond to VCA digital communication polling and will
not appear online.
VOL Volume/Gain
L0
to
L3
and
H0
to
H3
The L/H sets the sensitivity level and the number, 0
to 3, sets the volume level. In areas of high
background noise set the sensitivity to L (Low). This
requires the use to speak in a louder tone, closer to
the microphone Otherwise set the sensitivity to H
(High).
THRS Threshold
0
to
7
The threshold sets the audio level on the
communication required to turn the amplifier on and
sound from the speakers. 0 is the lowest level, where
by only a very low level of audio will turn on the
amplifier. 7 is the highest level.
ICHG Charging Current
5
to
40
(in mA) The charging current setting is the amount of current
the VAA will draw from the communication line to
charge its battery. The charging current requires
careful consideration as it depends on the output of
the I.S. power supply used, the number of VAAs
connected to the communication line and distance of
the VAA from the power supply.
ADDR VAA Address
1
to
31
Only 31 VAAs can be connected to each
communication line and each VAA is given a unique
address. Setting two VAAs to the same address will
cause an address clash
VAA Battery Pack
Battery Pack Features:

6V 1.2Ah Sealed Lead Acid (SLA) battery

Integrated battery charging circuit

19Vdc to 11Vdc I.S. supply input for battery charging

6.8V to 5.9V output to VAA

Auto-shutoff (over discharge protection)

‘Sleep’ mode for storage