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參數(shù)資料
| 型號： | HTRM800 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | HITAG long range reader module hardware |
| 中文描述： | 此外，HITAG遠距離讀寫模塊的硬件 |
| 文件頁數(shù)： | 14/20頁 |
| 文件大小： | 93K |
| 代理商： | HTRM800 |
2001 Oct 04
14
Philips Semiconductors
Product specification
HITAG long range reader module
hardware
HTRM800 family
10.5.2
R
ECOMMENDED ANTENNA CABLE AND LENGTH
The length of the antenna cable should be limited with five
meters. In case of longer cables a type with low
capacitance and resistance must be used. For standard
applications a 50
coaxial cable is recommended and a
75 or 95
coaxial cable for special applications.
10.5.3
T
UNING OF THE ANTENNA CURRENT
Potentiometer R72 (see Fig.2) is used to tune the current
driven through the antenna. The default setting is 200 mA.
It is not customary to change this value. However, if you
want to change the current for a special application, it
should be noted that V
o(peak)
< 10 V.
10.5.4
T
UNING OF THE ANTENNA PHASE
The signal from a transponder is delayed by the decay
time of the antenna. To achieve optimal performance this
signal and the digital signal processing unit of the reader
modulemustbesynchronous.Thusitisnecessarytostore
a phase information called Bit Clock Delay (BCD), which is
a function of the quality factor and the inductance
(reactance) of the antenna.
The default setting is 7 which is suitable in most of the
cases. Apart from that, the user is able to change the BCD
value. The reader module includes a non volatile memory
(EEPROM) to store the bit clock delay. To load the BCD
value to the reader module the command SetBCD is used.
10.5.5
HITAG
ANTENNA TUNING DEVICE
Especially for the HITAG product line the HITAG antenna
tuning device HTOT840 was designed. This tuning device
can be used for tuning long range and proximity antennas.
10.5.6
A
NTENNA MALFUNCTION INDICATION
If the antenna is broken or badly detuned, the antenna
overload bit is set. This bit can be read by the host system
via the serial interface by using the command
ReadLRStatus.
10.5.7
A
DDITIONAL REMARKS
The following list is a summary about HITAG long range
antennas:
Philips lays high emphasis on the research of antenna
development
The choice of various antenna shapes (the electrical
parameters) is characteristic to 125 kHz systems
The knowledge is transferred to Philips customers, in
ordertoenablethemtodesignandbuildantennaswhich
fit best for the particular applications (antenna training)
Solutions can be found for almost every environmental
scene (metal, periodic disturbers, special antenna
shapes, etc.).
10.6
Antenna arrangements
Various arrangements are suitable for different
applications (see Fig.6):
The single loop antenna is used for standard
arrangements
The gate antenna is used for typical access control
applications such as access control during passing
through the gate
The double gate antenna is similar to the gate using two
rows
The antenna multiplex system is a cost efficient
application, because one reader module drives many
antennas and the number of multiplexed antennas is
only limited by timing restrictions.
By changing the arrangement of the antenna, the total
system performance and reliability can be significantly
improved. As an example: building gate antennas with
opposite magnetic orientation leads to a very reliable
system.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HTRM800/AED | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:HITAG long range reader module hardware |
| HTRM800/AED,122 | 功能描述:RFID HITAG READER MODULE RS232 RoHS:否 類別:RF/IF 和 RFID >> RFID 讀取模塊 系列:HITAG® 遠程 產(chǎn)品目錄繪圖:DLP-RFID-UHF1B 標準包裝:1 系列:- RF 型:讀/寫 頻率:900MHz 特點:ISO 18000-6 a/b/c 封裝/外殼:模塊 供應(yīng)商設(shè)備封裝:模塊 包裝:散裝 產(chǎn)品目錄頁面:635 (CN2011-ZH PDF) 其它名稱:813-1029 |
| HTRM800/CED | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:HITAG long range reader module hardware |
| HTRM800/CED,122 | 制造商:NXP Semiconductors 功能描述: |
| HTRM800/EED | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:HITAG long range reader module hardware |
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