ClearOne comm Pro 840T User Manual

PROFESSIONAL CONFERENCING

DATA SHEET <

LEADING AUDIO
CONFERENCING
SOLUTION FOR
PROFESSIONAL
INSTALLATIONS

CONVERGE

Professional Conferencing System

The successor to the industry-leading XAP 400. Leveraging the rich
functionality, audio performance, and flexibility offered by the flagship
Converge™ Pro 880, the new 840T includes a built-in telephone
interface and power amplifier for standalone conferencing capabilities.
It also provides expansion capability with other Converge Pro mixers
for complex installations.

APPLICATIONS

Convention Centers and Hotels

Auditoriums

Stadiums

Conference Rooms

Houses of Worship

Theaters

TM

PRO | 840T

ADVANTAGES

Advanced Conferencing Feature Set

+ Next-generation Acoustical Echo Cancellation
> Improved duplex performance
> Push-to-talk microphone compatibility
+ Next-generation Noise Cancellation
> Adaptive modeling to room ambient noise condition
+ Increased resolution on Microphone Preamp stage
> 0-56 dB in 7 dB increments
+ Pre-AEC routing for Sound Reinforcement Applications
> Maximum of 4 millisecond processing delay
+ Management Improvements
> Integrated Ethernet and USB connections
> SNMP and HTML remote management agents
> Event scheduler
> Diagnostic console
+ Simplified Configuration Software
> Drag & drop A/V and channel objects
> Selectable views—unit, matrix, channel
+ Expanded Serial Command List

Superior Audio Performance

+ Next-generation Distributed Echo Cancellation® on every mic input
+ First-mic priority delivers clear audio to the far end
+ 20 Hz-22 kHz bandwidth for full-range audio response
+ ALC & AGC keep participants’ audio balanced and consistent

Configuration Flexibility

+ Scalable – link multiple Converge Pro units for extensive microphone coverage and up to

16 phone lines

+ Enhanced expansion bus, featuring 18 mix-minus audio buses for routing between
units
+ Ten mic gating groups (four internal & six global) allow separation of mics into
individual mixer gating groups for greater configuration flexibility
+ 32 presets can be executed on-the-fly without disturbing other ongoing preset
operations

+ 255 Macros for customized audio control/configuration with single command execution

Conferencing Capability

+ Built-in telephone interface and power amplifier
+ Link with multiple Converge Pro TH20s for up to 16-line capability
+ Also link to Converge Pro 880 or 8i for additional inputs and outputs

> CONVERGE PRO 840T BACK PANEL

> SPECIFICATIONS

CONVERGE PRO 840T DATA SHEET <

Audio Performance

Conditions: Unless otherwise specified, all
measurements are performed with a 20 Hz to 22
kHz BW limit (no weighting)
Frequency Response: 20 Hz to 22 kHz ±1dB
Noise (EIN): -126 dBu, 20 kHz BW, max gain,

Rs=150 Ω

THD+N: <0.02%
Dynamic Range: 100 dB (non A-weighted)
Crosstalk <-91 dB re 20 dBu @ 20 kHz channel
to channel

Auto Mixer Parameters

Number of Open Microphones (NOM)
PA Adaptive Mode
First Mic Priority Mode
Last Mic Mode
Maximum # of Mics Mode
Ambient Level
Gate Threshold Adjust
Off Attenuation Adjust
Hold Time
Decay Rate

Matrix Mixing Parameters

29x30 matrix
8 analog in/out
1 speaker out (amplified)
12 expansion bus in/out
4 assignable processing blocks in/out
4 assignable fader blocks in/out
1 telco in/out

Assignable Processing Blocks

Filters:
All pass
Low pass
High pass
Low shelving
High shelving
Parametric EQ
Notch
CD Horn
Crossovers:
Bessel
Butterworth
Linkwitz-Riley

Compressor
Delay; adjustable up to 250 ms

> CLEARONE LOCATIONS

Assignable Fader Blocks

Gain/Mute

Microphone Input Configuration

Input Gain Adjust
Mic or Line Level
Phantom Power on/off
Echo Cancellation on/off
Noise Cancellation on/off
Filters:
All Pass
Low Pass
High Pass
Notch
PEQ
Mute on/off
Chairman Override on/off
AGC on/off
Automatic Level Control on/off
Auto Gate/Manual gate
Adaptive Ambient on/off
Pre AEC channel

Mic/Line Inputs 1-4

Push-on mini-terminal block, balanced, bridging

Impedance: < 5 KΩ

Nominal Level: adjustable -56 dBu to 0 dBu
(7 dB step coarse gain adjustment)
Maximum Level: -65 dBu to +20 dBu
Echo Cancellation: 130 ms tail time (works with
12 dB of room gain)
Noise Cancellation: 6–15 dB attenuation
Phantom Power: 24 V, selectable

Line Inputs 5-8

Push-on mini-terminal block, balanced, bridging

Impedance: > 5 KΩ

Nominal Level: 0 dBu
Maximum Level: 20 dBu

Outputs 1-8

Push-on mini-terminal block, balanced

Impedance: < 50 Ω

Nominal Level: 0 dBu
Maximum Level: 20 dBu

Amplifier Output

Binding post connection

10 Watts @ 4 Ω Impedance

THD + Noise: <0.5%

Telco Line

RJ-11
POTS (plain old telephone service) or
analog extension from a PBX
A-lead supervision provided

Telco Set

RJ-11
POTS (plain old telephone service) or
analog extension from a PBX
A-lead supervision provided

Telephone Audio Performance

Conditions: Unless otherwise specified,
all measurements are performed with
Transmit Limiter and Receive ALC disabled
Frequency Response: 250 Hz to 3.3 kHz ±1 dB
THD+N: <0.3%, re-max level 250 Hz to 3.3 kHz
SNR: >62 dB re max level

Telephone Echo Cancellation

Tail Time: 31 ms
Null: 55 dB nominal

Telephone Noise Cancellation

Noise Cancellation: 6–15 dB attenuation

Expansion Bus In/Out

Proprietary Network
RJ-45 (2), 1.9 Mbps
Category 5 twisted-pair cable, 200’ maximum
cable length between any two Converge Pro
devices

Ethernet

Autoswitching with Quality of Connection (QoC)
10/100 Ethernet Network Port
10/100 Ethernet PC Port
RJ-45 Connectors

RS-232

Serial Command Protocol Only (Console
software not supported on RS-232 port)
DB-9 female
9,600/19,200/38,400/57,600/115,200 baud rate;
8 bits, 1 stop, no parity
Hardware flow control on (default)/off

USB

Version 2.0 Compatible
Type: B-connector

Control/Status

DB-25 female A/B (2)
Inputs A/B: active low (pull to ground)
Outputs A/B: open collector, 40 VDC max,
40 mA each
+3.3 VDC pins (2) (300 mA over-current
protected)

Configuration & Administration Software

Convergetm Console

Power Input Range

Auto-adjusting
100–240 VAC; 50/60 Hz

Power Consumption

30W Typical

Dimensions (L x D x H)

17.25” x 10.25” x 1.75”

43.8 x 26 x 4.5 cm

Weight

7.5 lbs/3.3375 kg unit weight
12 lbs/5.4kg shipping weight

Operating Temperature

14° F/-10° C to 122° F/50° C ambient room
temperature

Approvals & Compliance

AES48-2005: AES standard on interconnections
— Grounding and EMC practices — Shields
of connectors in audio equipment containing
active circuitry (self certified)
U.S.A. & Canada
CSA safety listed
EU Countries
RoHS compliant
WEEE compliant
See product manual for additional details

Optional Accessories

Converge Pro 880
Converge Pro 880T
Converge Pro 8i
Converge SR 1212
Converge SR 1212A
Converge Pro 840T
Converge Pro TH20
Tabletop Controller

Part Number

910-151-840 Converge Pro 840T – 4-channel
AEC Microphone Mixer with built-in telephone
hybrid amplifier

Headquarters:
Salt Lake City, UT USA

5225 Wiley Post Way
Suite 500
Salt Lake City, UT 84116
Tel: [phone]
Toll Free: 800-945-7730
Fax: [phone]
[e-mail]

© 2009 ClearOne Communications, Inc. All rights reserved. Information in this document is subject to change without notice. Other product names may be registered trademarks of their respective owners who do not necessarily endorse ClearOne
or ClearOne’s products in the United States and/or other countries.
ClearOne Document: 802-151-840 Revision 1.5 April 2009.

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