ATI Technologies MMA400-800 Betriebs- und Wartungshandbuch - Seite 6
Blättern Sie online oder laden Sie pdf Betriebs- und Wartungshandbuch für Verstärken ATI Technologies MMA400-800 herunter. ATI Technologies MMA400-800 10 Seiten. Line and microphone amplifiers
Seite druckenAudio inputs and outputs should be connected using the rear panel labels
as a guide. HI outputs are all in phase with each other and are in phase with the
HI inputs. Fanning strips are provided with your unit so that our ears won't start
burning in the middle of the night when you try to wrap wires around those tiny
barrier block screws. The fanning strips can be cut up into individual groups of
terminals, if desired. The fanning strips are Kulka part number 649A22 and
extras are available at exorbitant prices from our Parts and Accessories
Department. Kulka sells them cheaper, but they have a six-month lead-time,
which isn't going to do you any good when you have to be operating by Thursday
and somebody threw out the original strips with the packing material.
CAUTION: Your Multiple Amplifier Array has active drivers for the balanced
outputs if the model number on the rear panel serial number label has a -2 suffix,
e-g, MMA400-2, MLA800-2. (Models with -1 suffixes have transformer-balanced
outputs). Units with active balanced outputs have active drivers for both the HI
and the LO output terminals. DO NOT GROUND EITHER THE HI OR LO
OUTPUT TERMINALS OF ACTIVE BALANCED OUTPUT MODELS. If you are
driving a single ended, unbalanced, one side grounded, IHF, phono jack type
input either high impedance or 600 ohms, it should be connected from either HI
to GND or LO to GND but NOT from HI to LO. Only if you are driving a balanced
load, connect it between HI and LO output terminals. It is not necessary to
terminate an active output driver although placing a 600-ohm terminating resistor
across a hi-Z input at the receiving end will sometimes reduce RF pickup.
Transformer output units may be connected to either grounded or
balanced loads with impunity (wire works better). Transformer outputs prefer to
be terminated in their rated impedance (600 ohms) for flattest response,
however, you can leave these unterminated with only minimal effect since we
provide internal high frequency loading networks.
To further confuse the issue, all MMAs have active balanced INPUTS,
these are NOT the same as active balanced outputs and nothing in the previous
two paragraphs has anything to do with them. Active balanced inputs can be
driven from active or transformer balanced outputs, unbalanced outputs, IHF
phono jacks or practically any other signal source below +22dBm maximum level.
Connect the signal HI to input HI and the source LO (if balanced) or Shield or
Ground (if unbalanced) to the LO input terminal. Unless the source has a
transformer balanced output there should be a ground connection carried
between the source and the MAA ground. DO NOT FLOAT THE LO INPUT;
either connect it to the source or jumper it to ground, otherwise the input stage
gain and frequency response will be affected.
Audio Technologies Inc.
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856-719-9900
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www.
audio.com