Knogo North America UHFWRAP Security Tag Detector User Manual Installation Instructions

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Document ID	94967
Application ID	W9/aXgezcwbSHgnOxcHs5w==
Document Description	Installation Instructions
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Microsoft Word - pdf
Filesize	2.09kB (26113 bits)
Date Submitted	2000-04-07 00:00:00
Date Available	2000-04-18 00:00:00
Creation Date	2000-04-07 07:50:41
Producing Software	Acrobat Distiller 4.0 for Windows
Document Lastmod	2000-04-07 07:50:43
Document Title	Installation Instructions

Knogo North America
UHF Wrap Desk
Installation Procedure
Prepared By:
Date:
D. Lundquist
4/2/2000
Revision:
This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: 1)
This device must not cause harmful interference; and (2) This device must accept any interference received,
including interference that may cause undesired operation. This device complies with RSS-210 of Industry
and Science Canada. Operation is subject to the following two conditions: (1) This device may not cause
harmful interference, and (2) This device must accept any interference, including interference that may
cause undesired operation of the device.
USER NOTICE
The KNOGO system operating on your premises is registered with the FCC in compliance with Part 15
rules. The FCC identifier for this equipment can be found on a label which is affixed to the system itself.
The FCC requires that the following statement be supplied to all users of registered equipment.
CAUTION
CHANGES OR MODIFICATIONS NOT EXPRESSLY APPROVED BY THE PARTY RESPONSIBLE
OR COMPLIANCE TO THE FCC RULES COULD VOID THE USER'S AUTHORITY TO OPERATE
THIS EQUIPMENT.
1.0 System Description.
The Ranger III Wrap Desk is an accessory normally used the Ranger III UHF EAS detection system. The
Ranger III system itself provides the ability to detect small, diode-based tags in a zone extending up to 12 ft
(3m) from the system. The system is normally installed concealed in a ceiling above the desired detection
zone providing coverage down to the floor and up to 20 ft wide for a single system. The Wrap Desk is
normally installed at the point of sale register and detects the same tags on merchandise at a much smaller
range. Sales personnel can then be made aware of concealed tags on merchandise that is being rung-up at
the register. This prevents embarrasing alarms on paying customers if they were to exit the store with
tagged merchandise.
The transmit signal from the system is a 916MHz carrier which is switched at 4KHz rate between two ¼
wave antennas built into the unit. This modulation provides both spacial diversity to eliminate nulls, and a
unique signature the receiver can use to eliminate false alarms. Transmit power is approximately 0dBm
(0.001W).
The tags are optimized to produce large amounts of second harmonic re-radiated field when exposed to the
916MHz carrier from the transmitter. Tags are made up of zero-bias Schottkey diodes attached to stamped
brass antennas which are mounted inside molded plastic housings.
Receive 1830MHz second harmonic from the tags is picked up via an single1830MHz quarter wave
antenna encorporated onto the main PCB. After being filtered and amplified, the receive signal is fed to a
diode detector to extract the 4KHz modulation. The detector output is further amplified and filtered at
baseband before being fed to a 12bit analog to digital converter. The digitized baseband signal is then
processed by a DSP (digital signal processor) to provide additional filtering and false alarm rejection. The
output of this DSP is a signal which finally drives an integral piezo audio alarm.
2.0 System Installation.
2.1 Unpacking and Inspection.
The unit is shipped in a single box containing the following items:
Main Chassis
12VAC wall transformer
Installation Manual
2.2 Power Connection.
The supplied 12VAC transformer is shipped prewired to the system. Simply plug the transformer into a
nearby 120V outlet. For best performance route the power cable directly away from the unit. Do not coil
or bundle the power cable near the unit. If excess cable length available it may be coiled or tied near the
power transformer.
2.3 System Placement
Proper placement of the system is important due to the effect that nearby tags and metallic objects may
have on performance. Two important points govern installation: 1: Try to eliminate metallic objects under
and in the immediate area surrounting the unit. 2: Tag detection below the system is equal to that above.
As a general rule try to maintain at least 10” of clearance below the unit to metallic objects and
approximately 5” horizontally. Small objects such as nails, screws and fittings that might be found in nonmetallic counter surfaces do not present a problem and need not be considered. Sheet metallic items more
than 5” on any side or in length will begin to have an effect on system operation.
Proximity of tags to the system is critical. While normal detection range is 12” to 18” vertically, under
some conditions the system may see tags as much as 36” or slightly more from the unit. The bin used to
hold removed tags should be as far as practical from the system. A metallic container will provide a good
degree of sheilding. A foil lining on a non-metallic container is also very useful.
If any difficulty is encountered move the unit to a location well free of tags and metallic objects and retest.
Be sure to hold the tag by the ends with the tips of your fingers, well away from the palm.
2.4 Adjustments
There are no system adjusments
3.0 Specifications.
Agency Approvals: FCC ID#: J3Q-UHFWRAP
Industry Canada:
ETL:
CETL:
Power Requirements: 115VAC 60Hz 0.5A max
Physical Size: Main Chassis: 10" W, 1"H, 10"D
Power Supply:
Weight: Complete System: 3lbs,
Operating Temperature Range: 0 to 50 degrees C
Tx signal: 916MHz with 4KHz Spacial Diversity Modulation
Tx Power = +0dBm (0.001W)
Tx Antennas: 2 each ¼ wave PC trace at 916MHz
Tag type: Zero bias Schottkey
Rx Antenna: single ¼ wave PC trace at 1832MHz
Indicators: Audible Piezo beeper on Tag detect, Power LED

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