ATI Technologies L200 Betriebs- und Wartungshandbuch - Seite 2

Blättern Sie online oder laden Sie pdf Betriebs- und Wartungshandbuch für Verstärken ATI Technologies L200 herunter. ATI Technologies L200 8 Seiten. Line/sum/mike amplifier

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DESCRIPTION

Your L200 Dual Line/Buffer Amplifier is an inexpensive, high performance

amplifier, which is ideal as a gain block, attenuator, impedance converter,

summing amplifier and signal splitter.

The inputs provide balanced 40Kohm bridging impedance for line levels up to

+24dBm. The high input impedance allows the L200 input to also bridge -10dBu

(hi-fi, RCA plug) lines without loading.

Front panel, screwdriver adjust, full range gain controls provide 26dB gain at full

clockwise rotation, unity gain at twelve o'clock and a smooth audio taper to full

off.

The output drivers are servo controlled, ground-sensing circuits, which will supply

over +22dBm to 600 ohm balanced loads and +20dBu to high impedance,

unbalanced loads. The L200 uses rugged XLR type input and output connectors.

Loop-through DC connectors allow several NANOAMPS to share a single

external 24VDC power supply. Battery packs and DC-DC converters for portable

use are also available.

Up to three NANOAMPS will mount side-by-side in only one rack unit using the

available rack mounting kits. Your L200 may also be neatly stacked or mounted

side by- side on your desk with the available angled desk mounting kits.

CIRCUIT DESCRIPTION

INPUT STAGES

The balanced input stages of the L200 Line Amplifier utilize a FET input LF347

quad opamp in a clean, quiet inverting instrumentation amplifier configuration.

Input levels up to +24dBm will be handled without clipping, excess levels cause

only clean clipping without hang-up or phase reversal. Equal -6dB gains from

both HI and LO inputs allow unbalanced sources to be easily accommodated.

Bridging impedance is a high 40Kohms with good CMR.

GAIN STAGES

A low noise NE5532 provides 26dB maximum gain. Inexpensive linear controls

are used in a unique circuit configuration to provide a logarithmic 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.

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