PHILIPS HTOT840 Hitagtm antenna tuning device Datasheet

HT OT840
HITAG
TM
Antenna Tuning Device
Product Specification
Revision 1.1
November 1996
HTOT840
Rev. 1.1
1996-11-22
Contents
Contents .................................................................................................................... 2
1. General Remarks .................................................................................................. 3
2. Specifications ....................................................................................................... 3
3. Ordering Information ............................................................................................ 4
4. Using the HITAG Antenna Tuning Device........................................................... 5
4.1. Tuning HITAG Long Range Antennas ...................................................................... 6
4.2. Tuning HITAG Proximity Antennas .......................................................................... 6
Author: Renate Rossoll
Htot840.doc/HS
Page 2 of 9
HTOT840
1.
Rev. 1.1
1996-11-22
General Remarks
For optimal performance HITAG antennas have to be tuned during production, respectively by
start-up or, for service purposes, during operation. The HITAG Antenna Tuning Device is a
very easy to handle and cost effective solution for the tuning of 125 kHz HITAG antennas.
The device is - besides the HITAG antenna training - the optimal complement for antenna
design. The HT OT840 therefore is an unrenouncable tool for everybody who designs,
produces or even uses HITAG antennas.
The HITAG Antenna Tuning Device can be used for tuning HITAG long range as well as
HITAG proximity antennas.
2.
Specifications
• temperature range:
• protection class:
• precision at room temperature:
0 .. 50°C
IP40
measuring current: class 5
measuring phase:
class 10
± 50 parts of scale are ± 50° (for rough tuning of an
antenna with L ≈ 1 mH and Q ≈ 40.)
three-pole DIN - connectors
• phase sensitivity:
• connection:
100
200
0
300
mA
40
30
0
20 10
10 20
30
+
cap
Htot840.doc/HS
40
50
50
deg
ind
Page 3 of 9
HTOT840
3.
Rev. 1.1
1996-11-22
Ordering Information
Type Name
Description
Ordering Number
HT OT840
HITAG Antenna Tuning Device
9352 341 60122
Htot840.doc/HS
Page 4 of 9
HTOT840
4.
Rev. 1.1
1996-11-22
Using the HITAG Antenna Tuning Device
The HITAG Antenna Tuning Device is a combined current- and phase measurement device. It
can be used for tuning HITAG long range as well as HITAG proximity antennas. Selection
between long range and proximity is done with the help of a switch.
The tuning device is connected between antenna and read/write device as described in the
following:
The cable with plug (DIN 41524) has to be connected to the read/write device, the antenna
cable is to be connected to the jack (DIN 41524) of the tuning device.
Adapters - if they are necessary - e.g. for connection of a proximity system, can be built up
very easily.
Pin assignment of the DIN connectors:
Pin 1: Ground
Pin 2: Rx (not used for long range antennas)
Pin 3: Tx
Moreover, the cable with one of the two DIN connectors (plugs) can be used to build up an
adapter.
After connection of the Antenna Tuning Device the operation mode (proximity or long range)
has to be chosen with the help of the switch.
Afterwards power supply and read/write device can be switched on.
Htot840.doc/HS
Page 5 of 9
HTOT840
Rev. 1.1
1996-11-22
4.1. Tuning HITAG Long Range Antennas
The device has to be switched to long range mode.
The current should be about 200 mA, a tolerance of ± 10 mA is acceptable.
A current below the tolerance limit implies, that the antenna is badly detuned.
If the current is over the upper tolerance limit you should check the output current of the
read/write device. It should be 200 mA ± 10 mA. Otherwise the function of the read/write
device should be checked.
For tuning of the antenna refer to the measured phase. The phase should be 0° ± 15° (at a
current of 200 mA).
• If the phase is too high (direction: inductive) the tuning capacity has to be
decreased.
• If the phase is too low (direction: capacitive) the tuning capacity has to be
increased.
After tuning of the antenna the tuning device should be removed.
4.2. Tuning HITAG Proximity Antennas
The device has to be switched to proximity mode (changing the sensitivity).
For tuning of the antenna refer to the measured phase. The phase should be 0° ± 10°.
• If the phase is too high (direction: inductive) the tuning capacity has to be
decreased.
• If the phase is too low (direction: capacitive) the tuning capacity has to be
increased.
For HITAG proximity systems the current reaches its maximum when the
antenna is tuned exactly. An approximate value for the current is:
60 to 70 mA ± 10 mA.
Htot840.doc/HS
Page 6 of 9
HTOT840
Rev. 1.1
1996-11-22
Definitions
Data sheet status
Objective specification This data sheet contains target or goal specifications for product
development.
Preliminary
specification
This data sheet contains preliminary data; supplementary data may be
published later.
Product specification
This data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134).
Stress above one or more of the limiting values may cause permanent damage to the device.
These are stress ratings only and operation of the device at these or at any other conditions
above those given in the Characteristics section of the specification is not implied. Exposure to
limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the
specification.
Life support applications
These products are not designed for use in life support appliances, devices, or systems where
malfunction of these products can reasonably be expected to result in personal injury. Philips
Semiconductors customers using or selling these products for use in such applications do so on
their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting
from such improper use or sale.
Htot840.doc/HS
Page 7 of 9
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SCB52
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