Synetek Technology SKWHP28G 2.4G Digital Wireless Stereo Headphone w/ Tx User Manual
Synetek Technology, Ltd 2.4G Digital Wireless Stereo Headphone w/ Tx Users Manual
Users Manual
Synetek Technology, Ltd.
2.4GHz Digital Wireless Stereo Headphones
with
Transmitter Cradle
SK-WHP28G
User Manual
Version 4.1
Synetek Technology, Ltd.
14F.,No.9, Lane 110, Alley 30,
AN SIANG Rd., Hsintien City,
Taiwan, R.O.C.
www.synetek.net
sale@synetek.net
FCC Warning statement:
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 or more 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.
This Transmitter must not be co-located or operating in conjunction with any other antenna or
transmitter.
Any changes or modifications (including the antennas) made to this device that are not
expressly approved by the manufacturer may void the user’s authority to operate the
equipment.
**Warning: Wireless Limitation and Power Consumption
This headphone operates at 2.4G radio wave frequencies, and the unit is intended for use
within the same room as the signal source. Obstacles such as walls reduce the effectiveness
of the radio frequency wireless transmission. Refer to trouble shooting section to minimize
interference. Even with advanced engineering and technology employed for minimal
interference, the following sources are known to interfere with wireless transmission:
2.4G coreless phones when operating within 20 feet
Microwaves when operating within 15 feet
2.4G WiFi network when operating within 10 feet
Please keep adequate distance from interference sources to insure normal operation.
Headphone automatically mutes when strong interference is detected.
Power consumption level varies depending on transmission distance, background interference
level, audio program played, and battery quality.
SYNETEK Technology, Ltd.
Copyright © 2004 by SYNETEK Technology, Ltd. All Rights Reserved. 1
Table of Content
Introduction ......................................................................................................2
Package List ....................................................................................................3
Feature ............................................................................................................3
Headphones receiver / Digital RF transmitter drawing.......................4
Installation Guide .............................................................................................5
Technical Specification.....................................................................................6
FAQ and Trouble Shooting...............................................................................8
SYNETEK Technology, Ltd.
Copyright © 2004 by SYNETEK Technology, Ltd. All Rights Reserved. 2
Introduction
SYNETEK is committed to achieve new performance standards in digital
audio and video connectivity for consumers worldwide. We are able to
respond fast to develop, launch and support innovative products featuring the
most advanced digital audio and video technologies which enables the
company to maintain strong brand royalty among current product users and
to expand into new markets, gaining new customers.
Furthermore, we are aware of evolving trends within the mainstream
consumer and business user markets allowed for the introduction of many
products that have earned countless awards from leading industry
publications and gained early customer acceptance.
SK-WHP28G utilizes the global 2.4G wireless standard for enabling wireless
connections. It is a simple and instant radio solution that allows different
devices to talk to one another. SK-WHP28G eliminates the need for any
cable between devices such as audio source and the headphone.
SK-WHP28G facilitates fast and secured audio transmission between
devices even if they are not in line-of-sight. SK-WHP28G operates at low
power and has a range of 30 to100 feet (Line of Sight).
Applications suitable for SK-WHP28G:
• Audiophile Deck
• Television
• DVD Player
• Home Theater System
• Game Console
• MP3 Player
• Common audio source supplied in analog signal
SYNETEK Technology, Ltd.
Copyright © 2004 by SYNETEK Technology, Ltd. All Rights Reserved. 3
Package List
Thank you for choosing SK-WHP28G 2.4G Wireless Stereo Headphones kit.
It is unique and different from most wireless headsets in the market for its
good integration of audio stream.
The following checked items should be in the package.
Items Quantity
Headphones with built-in receiver 1
Digital RF transmitter with 3.5mm stereo
connector
1
AC Power adapter 1
3.5mm stereo line to RCA adaptor cable 1
Rechargeable Batteries 2
User manual 1
Features
Pure digital 2.4G wireless transmission for high fidelity quality
Quality headphone for comfort wear and dynamic sound quality
Zero data compression for lossless sound quality and minimal delay
Compatible with regular RCA audio jack, or 3.5mm stereo jack source
Wireless transmission 30 to 100 feet (line of sight)
Stylish transmitter cradle for holding headphone
16 wireless channels with auto scan to minimize interference
Digital forward error correction for clear sound
Co-exist with WiFi Wireless LAN, Bluetooth device, and cordless phone
Embedded antenna for best reception
Low power consumption design to ensure 4 to 8 hours of operation **
Headphones Receiver / Digital RF Transmitter drawing
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Copyright © 2004 by SYNETEK Technology, Ltd. All Rights Reserved. 4
Installation guide
Plug the SK-WHP28G Digital RF Transmitter into the audio line-in source
found on Television, Laptop/PC headphone connector, DVD player, Game
Console, or any audio line-out source. Use the 3.5 mm stereo plug for
3.5mm stereo jack. For RCA stereo jack, connect the RCA stereo
adaptor line to the RCA stereo jack.
Turn on the power switch on the Digital RF Transmitter.
Open the battery cover on the left hand side of the headphones, and
insert two AAA batteries with proper direction and close the battery cover.
Turn on power switch on the headphones.
LED light indicator on the transmitter and headphone indicates proper
operation.
Turn on audio player to hear the high quality sound from headphones.
Always start headphones from lowest volume, and then adjust volume to
adequate level to protect from over-stressing ears. Prolonged listening
of any earphone may cause over-stress in ears.
Note:
Frequency switch button on transmitter – The button is used for the user to
change working frequency manually to avoid the noise in case there has
interference.
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Technical Specification
Sampling Rate (fs): 32KHz/44.1KHz/48KHz
Input Clock: 12MHz/12.288MHz/16.9344MHz/18.432MHz (384xfs)
Un-compressed digital audio signal for highest sound quality
Operating Frequency of ISM band 2.4-2.4835 GHz
On 16 selectable Channels with auto scan for available clear channel
Transmit Rang 30-100 Feet (Line of Sight)
Audio Frequency Response: 20Hz~20KHz (+/-1 dB)
With no data compression for the best audio quality and low latency
Dynamic Range : 85 dB
Transmit Power : +17dBm
Receive sensitivity : -83dBm
Audio Input Level : 4Vpp (max)
Audio Output Level : 3Vpp (max)
Avoids reception errors by employing forward error correction and
error control
Coexist with Wireless LANs, Blue Tooth and other ISM band devices
Embedded Antenna
Digital Volume Control
Forward Error Correction
Transfer rate of Control Information: 3.8Kbps – 7.9 Kbps
Auto-mute upon detection of strong interference
Auto-power-down
Auto Channel Searching
Operating Conditions……Supply Voltage (VDD01, VDD02, VDD03,
VCCPLL) …… +3.0V to + 3.6V
Operating Ambient Temperature (Ta)……………………... 0℃ to +80
℃
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Electrical Characteristics
Parameter Test
Condition Min. Typ. Max. Unit
Power Supply
Supply Voltage 3.0 3.3 3.6 V
Operating Current @ 3.3V 25 mA
Data Voltages
High Level Input Voltage 2.4 V
Low Level Input Voltage 0.7 V
Channel Frequency
SK-WHP28G supports a total of 14 Channels. In the table below, the
frequency of Channel 4 is equal to the frequency of Channel 14. And the
frequency of Channel 6 is equal to the frequency of Channel 16.
Channel
Number Transmitter Receiver
1 2467.0 MHz 2456.3MHz
2 2414.5 MHz 2403.8 MHz
3 2441.1 MHz 2430.4 MHz
4 2463.2MHz 2452.5 MHz
5 2425.9 MHz 2415.2 MH
6 2455.6 MHz 2444.9 MHz
7 2433.5 MHz 2422.8 MHz
8 2459.4 MHz 2448.7 MHz
9 2418.3 MHz 2407.6 MHz
10 2448.0 MHz 2437.3 MHz
11 2422.1 MHz 2411.4 MHz
12 2451.8 MHz 2441.1 MHz
13 2429.7 MHz 2419.0 MHz
14 2463.2 MHz 2452.5 MHz
15 2437.3 MHz 2426.6 MHz
16 2455.6 MHz 2444.9 MHz
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Copyright © 2004 by SYNETEK Technology, Ltd. All Rights Reserved. 7
FAQ and Trouble Shooting
1. Earphone is not working?
The battery may be running low. Switch with new battery to solve this
problem. Also see poor reception and out-of-sync help.
2. Earphone is having poor reception?
The battery may be running low. Switch with new battery to solve this
problem. There may be strong interference source too close too the unit.
Follow interference minimizing guidelines on the inside of cover page.
Also use the manual channel switch to switch for clear channel.
3. Earphone may be out of sync with the transmitter?
Turn-off both Digital Transmitter and Headphone unit. First turn on the
Digital Transmitter. Wait for 5 seconds, and then turn on the Headphone
unit. The transmitter and headphone pair will automatically recognize
each other and become in-sync.
4. What is ISM Band?
The Industrial, Scientific and Medical (ISM) radio bands are the industrial
equivalent of the "Citizens Band". No license is required. Every country
has different regulation. 2.400-2.483.5 GHz is common worldwide.
5. What is Digital RF Audio?
Pure digital method to transfer audio maintains the best quality post
transmission. The obsolete method with analog FM transmission has poor
audio quality on receiver.
6. RF interference
Due to ISM 2.4Ghz is unlimited radio band, there are many equipments
are using in the same band. The user has to careful to use the device to
keep the best performance. In 2.4Ghz ISM, there are WLAN, Bluetooth,
and Cordless phones. Microwave oven emits radio wave in the same
band. In order to avoid RF interference, use the “Channel Select” switch
in transmitter for user to change working frequency if it needed.
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7. How to avoid WLAN interference
WLAN is using SST technology for transmission and occupies 20Mhz per
channel. In order to avoid the interference with WLAN, the WLAN user
could turn on WLAN utility to check the working channel for WLAN and
switch to the right channel for 2.4G wireless headphones to avoid the
interference from WLAN.
8. Number of working frequency: 16
9. Frequency selection for SYNETEK 2.4G wireless headphones:
Manual select on transmitter, Auto scan on receiver. User could select
working frequency by push the channel select switch on transmitter and
receiver will change accordingly.
SYNETEK Technology, Ltd.
Copyright © 2004 by SYNETEK Technology, Ltd. All Rights Reserved. 9
WARRANTY AND R.M.A POLICY
General Warranty
* SYNETEK Ltd. provides one (1) year warranty for parts and sixtty (60) days for labor for all
products from the date of invoice by repairing or replacement. This warranty shall not extend
to any damage, defect, or malfunction caused by abuse, misuse, or unauthorized
modification by the customer. "SYNETEK" reserves the right to refuse service due to any
physical damage.
* There will be a 15% restocking charge if merchandise that meets manufacturer's
specifications is returned for reasons of "general dissatisfaction with performance" or
incompatibility with hardware or software within fifteen (15) days from the date of invoice and
must be returned in the original condition as sold. Absolutely no return for credit after 15 days
from the date of invoice, and no cash refund.
RMA Policy
* Products proved defective during the warranty period will be replaced or repaired by
"SYNETEK"
* Defective products will only be tested for the problem reported. If no specific problem was
reported, only "SYNETEK"'s general testing procedures will be applied.
* Any products do not found to be defective will be returned to the customer as is.
* "SYNETEK" will not be responsible for the physical damage, due to improper packing, or
incurred during the transportation from the "Customer's Site" to " SYNETEK ". Any damage
claims against the shipping company are the responsibility of the Customer.
* If the in house credit will be issued, it is based on the product's current market price . Not
the original Invoice selling price.
Technical Support
If you have further questions, please contact our Technical Support Department.
Thank you!
Synetek Technology, Ltd.
14F.,No.9, Lane 110, Alley 30,
AN SIANG Rd., Hsintien City,
Taiwan, R.O.C.
www.synetek.net
sale@synetek.net