KEF GPE Sub TX User’s Manual
Engineering Department
Customer : KEF
Product Description : GPE Subwoofer Transmitter Module
Issue Date : 29 Aug, 2013
UXD13002
Model Number: GPE Sub TX
Version: A
Date: 29 August, 2013
Product Code: Page 1 of 7 Version: A
KEF GPE Sub TX User’s Manual
Engineering Department
1. TABLE OF CONTENTS
Page number
1. Table of Content…………………………………………….……………………. 2
2. Revision History…………………………………………………….……………. 3
3. Federal Communication Commission Interference Statement……………... 4
4. Electrical Characteristics………………………………………………....…….. 5
5. Final Product Installation……………………………………………………….. 7
Product Code: Page 2 of 7 Version: A
KEF GPE Sub TX User’s Manual
Engineering Department
2. Revision History
Version Date Sections Pages Revisions
A 29th August 2013 1 - 5 12 New Issue
Product Code: Page 3 of 7 Version: A
KEF GPE Sub TX User’s Manual
Engineering Department
3.
Federal Communication Commission Interference Statement
FCC NOTE (for U.S.A):
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not installed and used
in accordance with the instructions, may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the interference by one of the following
measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Radiation Exposure Statement
This device complies with FCC radiation exposure limits set forth for an uncontrolled environment.
This device should be installed and operated with minimum distance 20cm between the radiator & your
body and must not be co-located in conjunction with any other antenna or transmitter.
The host device itself and with integrated RF module needs to comply with the FCC regulations.
The OEM integrator is still responsible for the FCC compliance requirement of the end product, which
integrates this module. Appropriate measurements (e.g. 15 B compliance) and if applicable additional
equipment authorizations (e.g. Verification , Doc) of the host device to be addressed by the integrator /
manufacturer."
Labelling Information
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
Caution: Any changes or modifications not expressly approved by the party responsible for compliance
could void the user’s authority to operate this equipment.
Product Code: Page 4 of 7 Version: A
KEF GPE Sub TX User’s Manual
Engineering Department
4. Electrical Characteristics
Caution!
ESD sensitive device. Precaution should be used when handling the device in order to prevent
permanent damage.
4.1 DC Supply
DC Voltage Supply: 5 VDC
Current Consumption:
≤
150mA
4.2 Audio Specifications
Input: 0.7 Vrms
Sample Depth: 16-bit
Sampling Rate: 32 / 44.1 / 48 kHz
Firmware: Factory installed (not request the user update)
4.3 Pairing Mechanism
Pairing mechanism is proximity coupling. Dedicated receiver will send the pairing signal
request to GPE Sub TX module for wireless link establishment once a person press the pairing
button on the receiver. All pairing setup will be done in the manufacturer.
4.4 RF Specifications
Table II lists the detailed RF specifications of the GPE Sub TX module.
Specification Details Value Unit
1 Spread Spectrum Communication AFHSS
2 Operating Frequency Range 2404 ~ 2476 MHz
3 Non-Overlap Channel 18
4 Channel Spacing 4 MHz
5 Modulation
shaped-8FSK modulation at a 2 MHz
symbol rate using a rate-5/6 4D trellis
coded modulation scheme
6 Maximum RF Data Rate 5 Mbps
7 EIRP
≤ 20
dBm
8 Conducted RF Power 14 – 16 dBm
9 Sensitivity PER @ Attenuation -40dB
2
≤ 1% %
10 RF Bandwidth @20dB below Peak Power
1
3.7 – 4.5 MHz
Product Code: Page 5 of 7 Version: A
KEF GPE Sub TX User’s Manual
Engineering Department
Span = 5MHz and RBW / VBW = 300kHz / 1MHz
11
Maximum Carrier Tolerance @ 25°C
a) 2,406 MHz
b) 2,474 MHz
±
37
±
38
kHz
12 Conducted Spurious Measurement of Transmitting Mode
from 30MHz to 12,750MHz
≤ -42
dBm
13 PIFA Antenna Gain with PCB (1726-125A+000A) 1.3 dBi
14 Crystal Frequency 48 MHz
15 Radio Transmission (Typical living room environment
Line-of-Sight without blockage)
≥ 10
m
16 TX Latency 11 ~ 20 ms
Table II RF specifications of the GPE Sub TX module.
4.4 LED Indication
LED status:
Amber blinking (1Hz) = Pairing or Disconnect;
OFF = Bonded; Power On
4.5 PCB Layout
Product Code: Page 6 of 7 Version: A
KEF GPE Sub TX User’s Manual
Engineering Department
5. Final Product Installation
The module requests the dedicated connector of the KEF video powered speaker products.
Final product is installed for fixed location operation, and means that the device is physically
secured at one location and is not able to be easily moved to another location.
Normal range of GPE Sub TX with receiver is around 3m to 5m. Distance between audience
and wireless pair is typically 4m to 7m.
5.1 GPE Sub TX Application
The GPE Sub TX module is a wireless audio transmitter. User has to p lug the TX module into
the dedicated KEF speaker product which provides 5VDC and feed the subwoofer signal to TX
module for wireless transmission.
5.2 No Software Request
The software of GPE Sub TX module will be installed in the manufacturer. User doesn't
request any software installation.
GPE Sub TX module will automatically search the dedicated receiver once turn on the host.
Product Code: Page 7 of 7 Version: A
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