Voxx Electronics DEI547 2 Way LED User Manual G567V 05 04
DEI Headquarters, Inc. 2 Way LED G567V 05 04
Contents
- 1. instruction
- 2. user
user
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Wednesday, May 12, 2004
TUV Product Services
10040 Mesa Rim Road
San Diego, CA 92121
RE: FCC ID EZSDEI487
Dear Sir or Madam,
This letter is to address the following for the 547T Transceiver:
1. System transmission frequency range
2. Data transmission duty cycle description
3. Manuals
1. This transmitter is a single frequency device. It has a crystal controlled PLL oscillator which
generates the RF carrier. The crystal based oscillator can maintain a center frequency of
433.92MHz within a +/-35KHz tolerance. The receiver operated by this transmitter is a single
band receiver tuned to 433.92MHz and only capable of receiving this frequency.
2. The 547T is a data transmission device. Its protocol consists of the following worst case condition
for duty cycle credit calculation:
a) 17 preamble bits: 9 x 300us HI bits and 8 x 300us LO bits = 2.7ms ON time out of 5.1ms total time.
b) There’s a 3ms gap between the preamble bits and the data bits.
c) 57 data bits of 300us or 600us each, they are random. Worst case of 600us HI bits and 300us LO
will be used. So, 29 x 600us and 28 x 300us LO = 17.4ms HI out of 25.8ms total time.
c) There’s a 60ms gap between the end of the data bits and the beginning of the next frame.
d) Total worst case word = 2.7ms + 17.4ms = 20.1ms ON time out of 93.9ms
(5.1ms+3ms+25.8ms+60ms)
So for a worst case 100ms frame we have:
20.1ms ON out of 93.9ms + 3.3ms ON out of 6.1ms = 23.4ms out of 100ms = 23.4% ON time
OR a -12.62dB FCC duty cycle credit.
3. There are no dedicated manuals for this device. The 547T transceiver is part of several car alarm
and remote start systems. Included are the installation and owner’s guides for the system with
the most features which is representative of other, less feature rich systems. The installation
guide of all systems have a section covering the wiring of the transceiver. There are no user
features associated with this device. Once installed in the vehicle by certified car alarm installers
(Just connection) no interfacing to the device is necessary. No user or installer settings are
available, the device is purely to do RF communication. Please refer to the wiring diagram on
page 53 in the installation guide.
Sincerely,
Minas Minassian
RF Engineer
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© 2004 directed electronics, inc.
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Directed Electronics, Inc. ("Directed") promises to the original purchaser to repair or
replace with a comparable reconditioned model any Directed unit (hereafter the "unit"),
excluding without limitation the siren, the remote transmitters, the associated sensors and
accessories, which proves to be defective in workmanship or material under reasonable use
during the lifetime of the vehicle provided the following conditions are met: the unit was
professionally installed and serviced by an authorized Directed dealer; the unit will be pro-
fessionally reinstalled in the vehicle in which it was originally installed by an authorized
Directed dealer; and the unit is returned to Directed, shipping prepaid with a legible copy
of the bill of sale or other dated proof of purchase bearing the following information: con-
sumer's name, telephone number and address; the authorized dealers name, telephone
number and address; complete product description, including accessories; the year, make
and model of the vehicle; vehicle license number and vehicle identification number. All
components other than the unit, including without limitation the siren, the remote trans-
mitters and the associated sensors and accessories, carry a one-year warranty from the date
of purchase of the same. This warranty is non-transferable and is automatically void if: the
original purchaser has not completed the warranty card and mailed it within ten (10) days
of the date of purchase to the address listed on the card; the unit's date code or serial num-
ber is defaced, missing or altered; the unit has been modified or used in a manner con-
trary to its intended purpose; the unit has been damaged by accident, unreasonable use,
neglect, improper service, installation or other causes not arising out of defects in materi-
als or construction. The warranty does not cover damage to the unit caused by installa-
tion or removal of the unit. Directed, in its sole discretion, will determine what consti-
tutes excessive damage and may refuse the return of any unit with excessive damage. TO
THE MAXIMUM EXTENT ALLOWED BY LAW, ALL WARRANTIES, INCLUD-
ING BUT NOT LIMITED TO EXPRESS WARRANTY, IMPLIED WARRANTY,
WARRANTY OF MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE
AND WARRANTY OF NON-INFRINGEMENT OF INTELLECTUAL PROPERTY,
ARE EXPRESSLY EXCLUDED; AND DIRECTED NEITHER ASSUMES NOR
AUTHORIZES ANY PERSON OR ENTITY TO ASSUME FOR IT ANY DUTY,
OBLIGATION OR LIABILITY IN CONNECTION WITH ITS PRODUCTS.
DIRECTED DISCLAIMS AND HAS ABSOLUTELY NO LIABILITY FOR ANY
AND ALL ACTS OF THIRD PARTIES INCLUDING ITS AUTHORIZED DEAL-
ERS OR INSTALLERS. DIRECTED SECURITY SYSTEMS, INCLUDING THIS
UNIT, ARE DETERRENTS AGAINST POSSIBLE THEFT. DIRECTED IS NOT
OFFERING A GUARANTEE OR INSURANCE AGAINST VANDALISM, DAM-
AGE OR THEFT OF THE AUTOMOBILE, ITS PARTS OR CONTENTS; AND
HEREBY EXPRESSLY DISCLAIMS ANY LIABILITY WHATSOEVER, INCLUD-
ING WITHOUT LIMITATION, LIABILITY FOR THEFT, DAMAGE AND/OR
VANDALISM. THIS WARRANTY DOES NOT COVER LABOR COSTS FOR
MAINTENANCE, REMOVAL OR REINSTALLATION OF THE UNIT OR ANY
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ii © 2004 directed electronics, inc.
CONSEQUENTIAL DAMAGES OF ANY KIND. IN THE EVENT OF A CLAIM
OR A DISPUTE INVOLVING DIRECTED OR ITS SUBSIDIARY, THE PROPER
VENUE SHALL BE SAN DIEGO COUNTY IN THE STATE OF CALIFORNIA.
CALIFORNIA STATE LAWS AND APPLICABLE FEDERAL LAWS SHALL APPLY
AND GOVERN THE DISPUTE. THE MAXIMUM RECOVERY UNDER ANY
CLAIM AGAINST DIRECTED SHALL BE STRICTLY LIMITED TO THE
AUTHORIZED DIRECTED DEALER'S PURCHASE PRICE OF THE UNIT.
DIRECTED SHALL NOT BE RESPONSIBLE FOR ANY DAMAGES WHATSOEV-
ER, INCLUDING BUT NOT LIMITED TO, ANY CONSEQUENTIAL DAMAGES,
INCIDENTAL DAMAGES, DAMAGES FOR THE LOSS OF TIME, LOSS OF
EARNINGS, COMMERCIAL LOSS, LOSS OF ECONOMIC OPPORTUNITY
AND THE LIKE. NOTWITHSTANDING THE ABOVE, THE MANUFACTURER
DOES OFFER A LIMITED WARRANTY TO REPLACE OR REPAIR THE CON-
TROL MODULE AS DESCRIBED ABOVE. Some states do not allow limitations on
how long an implied warranty will last or the exclusion or limitation of incidental or con-
sequential damages. This warranty gives you specific legal rights and you may also have
other rights that vary from State to State.
This product may be covered by a Guaranteed Protection Plan ("GPP"). See your autho-
rized Directed dealer for details of the plan or call Directed Customer Service at 1-800-
876-0800. Directed security systems, including this unit, are deterrents against possible
theft. Directed is not offering a guarantee or insurance against vandalism, damage or theft
of the automobile, its parts or contents; and hereby expressly disclaims any liability what-
soever, including without limitation, liability for theft, damage and/or vandalism.
Directed does not and has not authorized any person or entity to create for it any other
obligation, promise, duty or obligation in connection with this security system.
Make sure you have all of the following information from your dealer:
A clear copy of the sales receipt, showing the following:
➤Date of purchase
➤Your full name and address
➤Authorized dealer's company name and address
➤Type of alarm installed
➤Year, make, model and color of the automobile
➤Automobile license number
➤Vehicle identification number
➤All security options installed on automobile
➤Installation receipts
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© 2004 directed electronics, inc.
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