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Sonifex mottagare CM-BHA

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Headphone Amplifier with Limiter
& Loudspeaker
For the latest Sonifex handbook information please visit the Sonifex website at www.sonifex.co.uk
This handbook is for use with the following product:
CM-BHA Beltpack Headphone Amplifier with Limiter & Loudspeaker
Stock Code: 30-277
Artwork: AW010625
©Sonifex Ltd, 2019
All Rights Reserved
Revision 1.02, November 2019
Sonifex Ltd, 61, Station Road, Irthlingborough,
Northants, NN9 5QE, England.
Tel: +44 (0)1933 650 700
Fax: +44 (0)1933 650 726
Email: sales@sonifex.co.uk
Website: https://www.sonifex.co.uk
Information in this document is subject to change without notice and does not represent a commitment
on the part of the vendor. Sonifex Ltd shall not be liable for any loss or damage whatsoever arising from
the use of information or any error contained in this manual.
No part of this manual may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying, recording, information storage and retrieval systems, for any purpose
other than the purchaser’s personal use, without the express written permission of Sonifex Ltd. Unless
otherwise noted, all names of companies, products and persons contained herein are part of a completely
fictitious adaptation and are designed solely to document the use of Sonifex product.
Made in the UK by
Product:
Serial No:
As standard, Sonifex products are supplied with a 1 year back to base warranty.
In order to register the date of purchase and so that we can keep you informed
of any product design improvements or modifications, it is important to
complete the warranty registration online. Additionally, if you register the
product on the Sonifex website, you can increase your product warranty to 2
years. Go to the Sonifex website at: www.sonifex.co.uk/register to apply for
your 2 year warranty.
‘the Company’ means Sonifex Ltd and where relevant includes companies within
the same group of companies as Sonifex Limited.
‘the Goods’ means the goods or any part thereof supplied by the Company and
where relevant includes: work carried out by the Company on items supplied by
the Purchaser; services supplied by the Company; and software supplied by the
Company.
‘the Purchaser’ means the person or organisation who buys or has agreed to
buy the Goods.
‘the Price’ means the Price of the Goods and any other charges incurred by the
Company in the supply of the Goods.
‘the Warranty Term’ is the length of the product warranty which is usually
12 months from the date of despatch; except when the product has been
registered at the Sonifex website when the Warranty Term is 24 months from
the date of despatch.
‘the Contract’ means the quotation, these Conditions of Sale and any other
document incorporated in a contract between the Company and the Purchaser.
This is the entire Contract between the parties relating to the subject
matter hereof and may not be changed or terminated except in writing in
accordance with the provisions of this Contract. A reference to the consent,
acknowledgement, authority or agreement of the Company means in writing
and only by a director of the Company.
a. The Company agrees to repair or (at its discretion) replace Goods which
are found to be defective (fair wear and tear excepted) and which are
returned to the Company within the Warranty Term provided that each of
the following are satisfied:
i. notification of any defect is given to the Company immediately
upon its becoming apparent to the Purchaser;
ii. the Goods have only been operated under normal operating
conditions and have only been subject to normal use (and in
particular the Goods must have been correctly connected and
must not have been subject to high voltage or to ionising radiation
and must not have been used contrary to the Company’s technical
recommendations);
iii. the Goods are returned to the Company’s premises at the
Purchaser’s expense;
iv. any Goods or parts of Goods replaced shall become the property of
the Company;
v. no work whatsoever (other than normal and proper maintenance)
has been carried out to the Goods or any part of the Goods without
the Company’s prior written consent;
vi. the defect has not arisen from a design made, furnished or specified
by the Purchaser;
vii. the Goods have been assembled or incorporated into other goods
only in accordance with any instructions issued by the Company;
viii. the defect has not arisen from a design modified by the Purchaser;
ix. the defect has not arisen from an item manufactured by a person
other than the Company. In respect of any item manufactured
by a person other than the Company, the Purchaser shall only be
entitled to the benefit of any warranty or guarantee provided by
such manufacturer to the Company.
b. In respect of computer software supplied by the Company the Company
does not warrant that the use of the software will be uninterrupted or
error free.
c. The Company accepts liability:
(i) for death or personal injury to the extent that it results from the
negligence of the Company, its employees (whilst in the course of
their employment) or its agents (in the course of the agency);
(ii) for any breach by the Company of any statutory undertaking as
to title, quiet possession and freedom from encumbrance.
d. Subject to conditions (a) and (c) from the time of despatch of the Goods
from the Company’s premises the Purchaser shall be responsible for any
defect in the Goods or loss, damage, nuisance or interference whatsoever
consequential economic or otherwise or wastage of material resulting
from or caused by or to the Goods. In particular the Company shall not
be liable for any loss of profits or other economic losses. The Company
accordingly excludes all liability for the same.
e. At the request and expense of the Purchaser the Company will test the
Goods to ascertain performance levels and provide a report of the results
of that test. The report will be accurate at the time of the test, to the best
of the belief and knowledge of the Company, and the Company accepts
no liability in respect of its accuracy beyond that set out in Condition (a).
f. Subject to Condition (e) no representation, condition, warranty or
other term, express or implied (by statute or otherwise) is given by
the Company that the Goods are of any particular quality or standard
or will enable the Purchaser to attain any particular performance or
result, or will be suitable for any particular purpose or use under specific
conditions or will provide any particular capacity, notwithstanding that
the requirement for such performance, result or capacity or that such
particular purpose or conditions may have been known (or ought to have
been known) to the Company, its employees or agents.
g. (i) To the extent that the Company is held legally liable to the
Purchaser for any single breach of contract, tort, representation
or other act or default, the Company’s liability for the same shall
not exceed the price of the Goods.
(ii) The restriction of liability in Condition (g)(i) shall not apply to any
liability accepted by the Seller in Condition (c).
h. Where the Goods are sold under a consumer transaction (as defined by
the Consumer Transactions (Restrictions on Statements) Order 1976) the
statutory rights of the Purchaser are not affected by these Conditions of
Sale.
Each product is shipped in protective packaging and should be inspected for
damage before use. If there is any transit damage take pictures of the product
packaging and notify the carrier immediately with all the relevant details of the
shipment. Packing materials should be kept for inspection and also for if the
product needs to be returned.
The product is shipped with the following equipment so please check to ensure
that you have all of the items below. If anything is missing, please contact the
supplier of your equipment immediately.
Item Quantity
Product unit 1
A3 Folded Handbook 1
Please contact Sonifex or your supplier if you have any problems with your
Sonifex product. Email technical.support@sonifex.co.uk for the repair/upgrade/
returns procedure, or for support & questions regarding the product operation.
The products in this manual comply with the essential requirements of the
relevant European health, safety and environmental protection legislation.
The technical justification file for this product is available at Sonifex Ltd.
The declaration of conformity can be found at:
https://www.sonifex.co.uk/declarations
The Waste Electrical and Electronic Equipment (WEEE) Directive
was agreed on 13 February 2003, along with the related Directive
2002/95/EC on Restrictions of the use of certain Hazardous
Substances in electrical and electronic equipment
(RoHS). The Waste Electrical and Electronic Equipment Directive (WEEE)
aims to minimise the impacts of electrical and electronic equipment on the
environment during their life times and when they become waste. All products
manufactured by Sonifex Ltd have the WEEE directive label placed on the case.
Sonifex Ltd will be happy to give you information about local organisations that
can reprocess the product when it reaches its “end of use”, or alternatively all
products that have reached “end of use” can be returned to Sonifex and will be
reprocessed correctly free of charge.
This apparatus should be installed in an area that is not subject to excessive
temperature variation (<0°C, >50°C), moisture, dust or vibration.
This apparatus shall not be exposed to dripping or splashing, and no objects
filled with water, such as vases shall be placed on the apparatus.
5 6 7 8
The CM-BHA is a portable, battery powered headphone amplifier for use in live
applications such as in-the-field news reports, providing audio feed monitoring
by headphones, earpiece, or built-in speaker.
Up to +30dB of gain can be applied to the incoming signal. The volume control
simultaneously modifies the output volume and the input gain, allowing input
signals of up to +18dBu to be reproduced without distortion.
An adjustable limiter protects the listener from excessive levels. The limiter is
only enabled when an earpiece or headphones are used, and when it is enabled
by the toggle switch. It is disabled when no jack is inserted, allowing a higher
volume to be passed to the speaker for “squawk mode” use.
Fig 1-1: CM-BHA Belt Pack Headphone Amplifier
A low battery warning LED flashes when the 9V PP3 battery has depleted to 6V,
notifying the user to swap the battery. The low power circuitry of the CM-BHA
gives up to 200 hours use from a single alkaline 9V PP3 battery.
Fig 1-2: CM-BHA Block Diagram
Fig 2-1: Top Panel View of CM-BHA
The headphone/earpiece connector is a ¼” jack socket that provides a
differential signal to a mono earpiece, or to stereo headphones. When using
stereo headphones, the right ear will be anti-phase, however speech will be
perfectly discernible.
The gain/volume control simultaneously modifies input gain and output
volume, allowing the user to connect high level signals (up-to +18dBu) without
distorting.
Should the battery voltage fall below 6V, the 3mm red low battery indicator will
flash, warning the user that the battery should be changed as soon as possible
to prevent failure.
The output level limiter (when enabled) prevents large signals from damaging
the user’s ears. The limit level is adjusted between -6dBu and +6dBu using
the recessed potentiometer, and limiter activity is indicated by a blue LED.
Persistent illumination informs the user that the volume should be reduced.
Fig 3-1: Side Panel View of CM-BHA
The output level limiter is enabled/disabled using the toggle switch on the side
panel. The limiter is disabled when the built-in speaker is active.
Fig 4-1: Bottom Panel View of CM-BHA
The audio connections are found on the bottom panel, and both have the
following connections:
Pin 1: Ground
Pin 2: Phase
Pin 3: Non-phase
The line input is an electronically balanced audio input with 200kΩ input
impedance, allowing multiple units to be daisy-chained together, without
causing noticeable loss of signal level. The line input can accept input levels of
upto +18dBu.
The loop through is a non-driven, parallel connection of the line input, allowing
multiple units to be daisy-chained together without specialist audio cables.
Low
battery
Limit
Off/On
Headphones
or earpiece
Speaker
Threshold
Limiter
activity
Volume
Gain
Off
On
Limiter
Loop through
Line
input <6V
Line Input Impedance: 200kΩ Electronically Balanced
Input Liiter Threshold: Adjustable -6dBu to +6dBu
Maximum Input Level: +18dBu
Input Gain/Volume: Adjustable -60dB to +30dB
Frequency Response: ±0.5dB (ref 0dBu 1kHz)
Distortion: <0.015% (ref +8dBu input, 0dB gain, 10kΩ load)
Maximum HP Output Level: +16dBu (ref 9V battery voltage, <1% THD,
2kΩ load)
+12dBu (ref 6V battery voltage, <1% THD,
2kΩ load)
Minimum HP impedance: 32Ω
Maximum Speaker Level: +12dBu (ref 9V battery voltage, <1% THD)
+6dBu (ref 6V battery voltage, <1% THD)
Dimensions (Raw): 12.5cm (W) x 6.7cm (D) x 4.8cm (H)
4.9” (W) x 2.6” (D) x 1.9” (H)
Dimensions (Boxed): 23cm (W) x 13cm (D) x 8cm (H)
9.1” (W) x 5.1” (D) x 3.1” (H)
Weight: Nett: 0.3kg Gross: 0.4kg
Nett: 0.7lbs Gross: 0.9lbs

Produktspecifikationer

Varumärke: Sonifex
Kategori: mottagare
Modell: CM-BHA

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