Ashly XR-4001 Manual de usuario descargar pdf (Pagina 8)

Signal Processors

The VCM-88 provides eight fully-independent VCA channels

in a single rack unit capable of limiting, remote level control,

and mixing. It is designed for installations such as houses of

worship, boardrooms, nightclubs, or any place remote control

of individual levels is required. By itself, the VCM-88 functions

as a precise eight-channel limiter with recessed threshold

adjustments on each channel.

Control is accomplished by Ashly’s RD-8 or RW-8 remote con-

trollers, RS-232 control using Ashly’s Protea System Software,

Crestron or AMX touchscreen controllers, MIDI, or DC control

using external potentiometers.

When connected to the Ashly RD-8 Remote Controller or DC

control, the VCM-88 adjusts individual channel and master

levels with a range of -75dB to +20dB. Each VCA channel

has separate input and output jacks for patching into line-

level signal paths, and can be reconfigured to use single

jack TRS insertion for patching into mixing consoles. In ad-

dition to setting and controlling the VCM-88 from the front

panel, a dedicated RS-232 computer interface and full MIDI

implementation is also provided.

Internal switching allows you to patch channels for signal

routing and matrixing and select channel pass-through for

cascading multiple units in parallel. The VCM-88 also has a

master output jack providing a summed output of all chan-

nels, allowing the unit to function as a fully-contained eight-

channel remote controlled line-level mixer.

FEATURES:

• Eight Channels of Remote Level Control

• RS-232 Interface Connector

• MIDI In and Thru

• PC Control Using Protea System Software

• Digital Control over a Single XLR Mic or Snake Line

• AMX Compatible NetLinx Control

• Internal Channel Patching for Flexible Signal

Routing and Matrixing

• Internal Selection of Crestron, AMX, MIDI,

or RS-232 Protocol

• Internal Channel Passthrough for Cascading

• Multiple Units in Parallel

• Signal Present LEDs on each channel

• RD-8, RW-8 Compatible

• Works With Any Mixer with Channel Insert Points

• Master Sum Output Jack

• +20dB to –75dB Level Control

• Individual Limiter Threshold Adjustment

for Each Channel

RD-8, RW-8 REMOTE CONTROL

VCM SPECIFICATIONS:

Input impedance: 20k Ohm balanced, 10k Ohm unbalanced

Max. Input level: +23dB

Output impedance: 200 ohm pseudo-balanced, 100 ohm unbalanced

Max. output level: +22dBu

Nominal gain:0dB ± 0.5dB

Gain range: +20dB to –75dB

Frequency response: ± 0.2dB, 20Hz–20kHz

THD: <0.01% @ 0dBu, 1kHz; <0.15% @

+20dBu, 20Hz–20kHz

Output hum and noise: <–94dBu, 20Hz–20kHz unweighted

Crosstalk: <–80dB @ 20Hz–20kHz

Connectors: 1/4” TRS

Limiter threshold range: –23dBu to +22dBu

Limiter compression ratio: 10:1

Data input type: 9-pin female D-Sub connector

Data format: RS-232 using Protea System Software

Data format XLR: 2Vp raised cosine, RS-232 or RS-422

1-start, 9-data, 1 stop bits @ 4800 baud

DC control input type: 15-pin female D-Sub connector

DC control voltage: –4V to +15V provided for external 10k

Ohm potentiometers

Power requirements: 95–125VAC, 50–60Hz, 18W (240V available)

Shipping weight: 9 lbs

Dimensions: 19” L x 1.75” H x 6” D

RD-8 SPECIFICATIONS:

Fader range: +10dB to –75dB (master fader @ 0dB)

Data/power connector: Male XLR jack

Max. data cable length: 1500 ft (24 ga, twisted pair)

Data format: 4800 baud, 2 Vp raised cosine

Data crosstalk to audio: <–120dB along 1000 ft of 150 Ω shielded cable

Size: 7.5” L x 3.5” H x 1.75” D

VCM-88 VCA MATRIXNG LEVEL CONTROLLER

RD-8 RACKMOUNT

Protea System Software (pictured above) can be used to

control the VCM 88.

Both the RW-8 and the RD-8 remote control units can be

used to control the VCM-88. Additionally, two RD-8s can

be mounted in a single rack-space unit. With their dual

(top and back) XLR jacks, they can be used just as easily

in a rack as they can when freestanding.

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Ashly XR-4001 Manual de usuario Pagina 8

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