ATI Technologies MMA400-800 Manual de funcionamiento y mantenimiento - Página 5
Navegue en línea o descargue pdf Manual de funcionamiento y mantenimiento para Amplificador ATI Technologies MMA400-800. ATI Technologies MMA400-800 10 páginas. Line and microphone amplifiers
Imprimir páginathe rear panel jumpers. They also make convenient gain blocks and telephone
line interfaces.
INSTALLATION
MOUNTING
Your Multiple Amplifier Array is designed for rack mounting on standard
E.I.A. 1-3/4 inch centers. Each unit dissipates approximately 20 watts and is
ventilated through slots in the rear panel. We have absolutely no idea how many
MMAs you can stack up in a rack before the solder melts, but we will be happy to
sell you enough to find out.
WIRING
Our insurance company insists on three wire grounded plugs. The power
line ground could cause a loop with your studio ground. If you are sure your
studio ground will provide adequate protection to your personnel in case of an
AC line short to chassis, a 3-to-2 AC adapter can be used to isolate the power
line ground. We recommend that the adapter be removed and the power line
ground reconnected prior to any service work requiring removal of the studio
ground from the chassis.
To allow maximum flexibility of ground in high RF environments, the circuit
board amplifier grounds are isolated from case ground. For normal operation,
you must add a ground jumper from a barrier strip ground terminal to the chassis
ground screw. Failure to ground the circuitry will result in excessive crosstalk,
possible oscillation and increased susceptibility to RF pickup.
The four inch, silver bearing, low inductance copper strap which you are,
of course, using for your studio ground is not going to fit around the #6 chassis
ground screw on the amplifier rear panel. Run the strap to within a few inches of
the chassis and jump to the chassis ground screw with shield braid.
We have taken heroic measures to keep RF pickup out of your amplifier.
This heroism includes split and bypassed input and output resistor networks,
Faraday shielded output transformers, beaded, bypassed and isolated power
inputs, non-concentric wound power transformers, double ground plane PC
boards and a nice enclosure which will keep rain and snow off the circuit boards.
However, in a difficult broadcast environment, any RF shielding and suppression
system is going to be no better than the ground system into which it is trying to
dump the unwanted RF. If you have a decent ground system and still have RF
problems, give us a call and we will hold a telephone prayer meeting. If you don't
have a ground system, you will still be O.K. as long as you don't turn on your
transmitter.
Audio Technologies Inc.
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856-719-9900
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www.
audio.com