2
Connection and function control
Mount the amplifier in a 19" rack, place it on a flat surface or mount it on a wall using the keyholes underneath.
Important!
The amplifier needs free airflow above and beneath the amplifier. It is important NOT to place the amplifier close to any
inflammable material sensitive to heating or any material running the risk of getting discoloured. If placed on flat surface or
wall mounted, use the rubber feet included in the box. The keyholes only admit horizontal mounting of the amplifier.
1. Inputs
Set all inputs to min. settings. Connect the input signal to corresponding input connector at the
rear panel. The combined XLR/6.35mm input is factory set for line input levels but could be set
for microphone use (see “jumper settings” section below). The SCART connectors are used for
TV and other SCART devices. The built-in Autoscart switching will ensure that the sound from
the active SCART device is connected to the loop system.
2. Mains power
Power the amplifier with the included power cord (power indicator lights up). UniVox
®
amplifiers
are equipped with a reset able built-in automatic mains fuse, type PTC. If it is triggered by any
reason remove the power cord and let the amplifier cool off. Investigate the possible fault reason
before reconnecting the power cord.
3. Adjust inputs
Slowly adjust the inputs making the LED input indicator on the front side lights up at program
peaks.
4. Connect the loop wire
Connect the loop wires to the corresponding loop output, Master or Slave. Note the wire between
loop figuration and amplifier must be twinned or very tight together to avoid interference with
other electrical systems.
5. Adjust loop current
Adjust the loop current for correct field strength on both Master and Slave loop according to
the certificate protocol (the loop LED only indicates that current flows in the loop wire). Use
the adjustable loop monitor outputs on the front panel for direct listening of the output current
(magnetic field).
Attention!
The loop LED indicates that current flows in the loop, not that system fulfils the standard,
IEC 60118-4:2006. See ”Measurement and certification” below.
Line outputs
There are two line outputs with RCA connectors giving 0 dBu with AGC-controlled level.
Measurement and certification
Attention!
Make sure that the amplifier is disconnected from the mains power before removing the cover.
Jumper settings related to XLR-input
Phantom power off: S3 open (Default). Phantom power on: S3 closed.
Microphone sensitivity: S1 and S2 open. Line sensitivity: S1 and S2 closed (Default).
Input AGC
AGC on (Default): S4 closed. AGC off: S4 open.
A complete and correct measurement, adjustment and certification of the UniVox
®
SLS system is achieved using the True
RMS Field strength meter FSM together with the certificate/measuring protocol (included). For detailed measurement
procedures please study the certificate. A complete certificate shall always be included in the documentation.
It is important that the staff responsible for the loop system has the necessary knowledge how the loop system works.
Otherwise there is a risk that the system doesn’t work as planned.
The loop receiver/testing device UniVox
®
Listener is a useful device for listening tests and basic level checks.
Jumper settings for sensitivity, phantom voltage and AGC-function
