TECOM A335W User Manual

A335W

USER MANUAL

東訊股份有限公司

Tecom Co; Ltd

新竹市科學園區研發二路

23

號

23, R&D Road 2, Science-Based Industrial Park

Hsin-Chu Taiwan R.O.C.

1 Marketing Definition and Requirements

This section shall contain consolidation of the process in product marketing. It is
acceptable that spec can be a bit loose in this chapter but subsequent chapters leave no
room for loose specs.

1.1 General Description

The product is a Bluetooth-enabled USB audio device intended to be used as an accessory
for standard industry PCs. It is designed to work with BT headsets as long as they adhere to
the Bluetooth 2.0+EDR specification supporting the headset Bluetooth profile than

bi-directional audio streaming.

The product targets primarily the ingenuous consumer or first-time headset user who
appreciates a hassle free truly PnP solution which operates instantly without requiring
neither configuration nor any installation of software, driver etc.

1.1.1 Market Problem

Due to an increasing interest in convenient VoIP services on standard industry PCs, where
headsets are a prerequisite, there is a growing demand for inexpensive, easy to install and
easy to use cordless headsets solutions.

1.1.2 Product Problem

Originally BT headset intended to be used with Mobile phones supporting voice services
only. Existing BT implementations on PCs consist of built-in BT components or external
accessories, like USB dongles, with BT functions and additional BT SW. This PC BT
implementation compared to built-in BT in telephone handsets is much more complex
(normally supporting many more profiles), and more focused on data use instead of voice
services, even if those solutions are capable supporting, e.g. headset or head-free profile.

1.1.3 Technology Problem

For BT support in a PC environment a BT Host protocol stack/SW needs to be operated on
the PC. This software needs to be installed, managed and launched by the user on the PC
before the headset can be paired and used for e.g. VoIP services. This kind of use is much
more complex and challenging for the user compared to the BT telephone
implementation/use case.

1.2 Key Features, Benefits and USPs

This section is informative. This is a list of new, essential and unique features which
differentiates the product.

Feature Benefit, explanation, comment
Mono and Stereo capabilities on
same hardware platform

Core unit performs as a mono / voice solution
(=Leopard). Firmware is user upgradeable to
additional stereo operation. In this state the
product converts into a mono/voice plus stereo
streaming device depending on BT HS
capabilities (=Swan).

Ease of use Leopard (and Swan) is a truly PnP solution not

requiring any specific driver or installation of
dedicated software for basic operation. Even
though Leopard is state of the art in terms of
MS Windows operating system (XP or higher)
support with MS standard USB and audio
drivers.

VoIP client / softphone support

Implementing the newly developed GN USB
standard the device will be compliant to the
Microsoft Unified Communications (UC)
standard. A variety of VoIP clients and/or
softphones using the current GN USB HID
commands (8120, 9300 series) will also
provide basic headset supported without
additional customization. The product is fully
compliant with GN’s PC software
developments and SDKs (Hector).

Other key functionality:

Auto pairing

• Device enters into auto pairing mode on 1

st

time use / connection

Table 1 - Key features

1.3 Features & Characteristics requirements

This section is based on the marketing product definition sheet. Details of how functions
shall operate must be presented in chapter 3. .

For details please refer to chapter 3 (functional requirements) and 4 (operational
requirements).

Functional

Physical
Characteristics

Connector USB
Size App. 70mm (L) x 18mm (W) x 8mm (H)
Weight <10 g

Mechanical
features

Button key Pairing button
Surface treatment No paint applied
Materials – general

characteristics

Mid-range quality feel

MMI features

Controls -
buttons, etc.

Pairing button Large, centered, tactile feeling, supporting

only pairing

Indicators - LEDs,
display, etc.

On, pairing,

connected

a.) 1xBlue LED (=Leopard)
b.) 1xBlue LED (=Swan)

Connectors

USB connector

Software features

Bluetooth specific
features

Applicable

standard

BT 2.0+EDR

Profiles HS, HF

Number of trusted

devices in the
trusted device list

Normally 1 set

USB software
features

USB device classes

• USB Audio device

• USB composite device

• USB Telephony device

Other software
features

Power-up

behaviour

First power up: goes into the pairing mode
Next power up: try to reconnect to the last

connected device for 1 min.

Downloadable

software

Software firmware updates and upgrades
possible via the USB port

Performance
characteristics

Electrical, RF

RF Bluetoth class 1 device
Power

Management

HS link management optimized maximum
headset standby / talk time

Table 2 - Characteristics

Operational

Environmental
targets

Operating

temperature

-10 - +60

Storage

temperature

-30 - +80

Table 3 - Operational characteristics

2.1 Model name

Product

Bluetooth PnP Audio USB Class1 Dongle – Leopard

Product ID

261-251531R

2.2 Firm ware

Leopard FW release 0.08

2.3 Hardware

2.3.1 Block Diagram

2.3.2

PCB Version

PN: 613-022651R Ver: A

3.1 Physical Dimension and Component Placement

With USB connector: 51 mm x 14.05 mm
W/O USB connector: 35 mm x 14.05 mm

3.2 RF Design Specifications

Transmitter

Min Typ Max

Bluetooth

Spec

Unit

Maximum RF transmit power 13 15 16 +4 ~ +20 dBm
RF Power control range - >20 - ≧16 dB
20dB bandwidth for modulated
carrier

- 715 - ≤1000 kHz

Adjacent channel transmit
power F= F0 ±2MHz

- -28 - ≤ -20 dBm

Adjacent channel transmit
power F= F0 ±3MHz

- -35 - ≤ -40 dBm

Adjacent channel transmit
power F ＞ F0 ±3MHz

- -43 - ≤ -40 dBm

Δf1avg Maximum Modulation - 165 -

140<Δ

f1avg<175

kHz

Δf2avg Minimum Modulation - 148 - ≥ 115 kHz
Δf2avg / Δf1avg - 0.9 - ≥ 0.80 -
Initial carrier frequency
tolerance

- ≤ 15 - ±75 kHz

Drift Rate - ≤ 15 - ≤ 20

kHz/50

μs
Drift (single slot packet) - ≤ 15 - ≤ 25 kHz
Drift (five slot packet) - ≤ 15 - ≤ 40 kHz
2nd Harmonic content - ≤ -33 - ≤ -30 dBm
3rd Harmonic content - ≤ -33 - ≤ -30 dBm

Receiver

Frequency Min Typ Max

Bluetooth

Spec

Unit

2.402
GHz

<-85 -88 >-90

2.441
GHz

<-85 -88 >-90

Sensitivity at 0.1% BER for all

packet type

2.480
GHz

<-85 -88 >-90

≤ -70 dBm

Maximum recived signal at 0.1% BER - ≥ -20 - ≥ -20 dBm

Warning statements

THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION

IS SUBJECT TO THE FOLLOWING TWO CONDITIONS:

(1) THIS DEVICE MAYNOT CAUSE HARMFUL INTERFERENCE, AND

(2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING INTERFERENCE

THATMAY CAUSE UNDESIRED OPERATION.

NOTE: THE MANUFACTURER IS NOT RESPONSIBLE FOR ANY RADIO OR TV INTERFERENCE CAUSED

BY UNAUTHORIZED MODIFICATIONS TO THIS EQUIPMENT. SUCH MODIFICATIONS COULD

VOID THE USER’S AUTHORITY TO OPERATE THE EQUIPMENT.