Axxent ISV 1090 Manuale d'uso - Pagina 2

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SETTINGS AND ADJUSTMENTS

Since the Universal Induction Loop Amplifier ISV1090 not only is appropriate as a stand-alone amplifier, but also in
combination with one or more amplifiers connected, you are able to set the output power plus the operation modes.
First, the output power:
Please keep in mind that the induction loop amplifier
ISV1090 can drive induction loops for venue surfaces
of up to 1000 square meters. In the maximum power
position the current reaches valued up to 8.8 A rms,
equivalent to approximately 12.7 A peak.
The ISV1090 provides adjustments for 4 different
power levels:
Up to 100 sqm, or 3 A rms
Up to 200 sqm, or 4.3 A (factory pre-set)
Up to 500 sqm, or 6.7 A rms
Up to 1000 sqm, 8.8 A rms
The factory setting is the second level for up to 200
sqm, 4.3 A. Other settings for power/coverage are ea-
sily made by changing the internal jumper position (see
schematic on next page)
Cable cross-section
finding the right gauge (single conduc-
tor, insulated) for an impedance between .5 and 1 ohm.
300
250
200
175
150
125
100
75
50
25
0
0.5
1
1.5
0
axxent e.K. · Technologiezentrum Herzbachtal · Zum Wartturm 15 · 63571 Gelnhausen
A little guide to select
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cable diameter,
®
ISV 1090 Universal Induction Loop Amplifier
2
2.5
3
3.5
2
Cable CSA (mm
)
Obviously, changes of factory settings can only be
made when you remove the steel cover. Important:
before you remove the cover, unplug the power cord.
All changes may be made only by qualified technicians
and not by consumers/endusers!
The following instruction explains the setting of the
two xlr microphone inputs sensivity. Factory setting
is at 1.5 mV, which is an average sensitivity of dynamic
microphones. Using a small screwdriver, the sensitivity
may be reduced down to 150 mV. This a typical auxiliary
leve, for example for MP3 players.
1 Ohm
0.5 Ohm
4
4.5
5
User Manual
Selection guide for correct wire
gauge: Wire should be single
conductor, stranded and the load
impedance between 0.5 to 1 Ohm.