ATI Technologies SUM100 Podręcznik konserwacji - Strona 3

Przeglądaj online lub pobierz pdf Podręcznik konserwacji dla Wzmacniacz ATI Technologies SUM100. ATI Technologies SUM100 7 stron. Amplifier technologies inc. line/sum/line amplifier operating and maintenance manual sum100

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GAIN STAGE

A low noise NE5532 section (A1A) provides 26dB maximum gain. A linear control

is used in a unique circuit configuration to provide a wide range logarithmic

MASTER gain control characteristic in a variable gain stage with optimum noise

performance. Output noise at unity gain is low enough to allow performance to

exceed 16-bit digital dynamic range even at -10dBu nominal output. Unity overall

gain is achieved at approximately 12 o'clock pot position.

LINE OUTPUT

The balanced output stage of the SUM100 utilizes a unique active balanced

output driver IC, the Analog Devices SSM2142, that senses whether the

connected load is balanced and floating or is unbalanced due to either side being

grounded. A balanced output load will be driven with equal and antiphase levels

on the HI and LO output lines.

An unbalanced (one side grounded) load will cause the driver IC to shut off the

signal output to the grounded side of the load and double the output level applied

to the other side, thus maintaining equal output to either type of load. The output

stage provides 6dB gain and will drive loads of 600 ohms and higher. Nominal

output is +4dBm with clipping at +22dBm (10Vrms) into 600 ohm balanced loads

for 18dB nominal headroom. Maximum output is reduced to +20dBu (7.8Vrms)

when driving an unbalanced load since the full output swing of only one driver is

available. This still provides a very comfortable 30dB of headroom above the

typical -10dBu nominal unbalanced signal.

POWER SUPPLY

The SUM100 requires 22 to 30VDC and are designed to share a common

external 24VDC "Wall Wart" type power supply. A pair of loop-thru DC

connectors on the rear of each module permits several units to be daisy-chained

with P/N20602-1 DC power cables to a single power supply. The WA100-1 and

WA100-2 (230VAC) are 400Ma supplies. The SUM100 draws 70mA. Any

combination of amplifiers, which add up to less than the supply rating, can be

INSTALLATION

UNPACKING

Inspect the equipment. If there is any visible damage to the unit or to the box it

came in, contact the factory but do not return anything to ATI without prior

authorization and shipping instructions. It may be necessary to have the shipping

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