|
|
PDF HX1-144.800-3 Data sheet ( Hoja de datos )
| Número de pieza | HX1-144.800-3 | |
| Descripción | VHF Narrow Band FM 300mW Transmitter | |
| Fabricantes | Radiometrix | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de HX1-144.800-3 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
|
No Preview Available !
NEW Radiometrix
28 August 2007
Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England
Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233
HX1 (300mW)
VHF Narrow Band FM 300mW Transmitter
The special HX1 transmitter modules
offer a 300mW RF output VHF data
link in Radiometrix SIL standard pin-
out and footprint. This makes the HX1
ideally suited to those low power
applications where existing narrow
band and wideband transmitters
provide insufficient range. Together
with the matching NRX1 or BiM1R
receiver a one-way radio data link can
be achieved over a distance up to
10km+ with suitable choice of data
rate and antennas.
Figure 1: HX1-169.4125-3-5V
Features
• Standard frequency: 169MHz band
• Other frequencies from 120MHz to 180MHz
• Data rates up to 3kbps
• Usable range over 10km
• Fully screened
• Low power requirements
The HX1 is a narrow band radio transmitter module for use in long range data transfer applications at
ranges up to 10kilometres. HX1 transmitter circuit is the BiM1T transmitter circuit in the TX1 pin-out
with slightly enlarged dimension to accommodate extra Power Amplifier circuit to produce 300mW RF
output and available for operation on 169MHz European licence exempt frequency band.
Applications
• Tracing and asset tracking systems
• Meter reading systems
• Industrial telemetry and telecommand
• Data loggers
• In-building environmental monitoring and control
• Social alarms
• High-end security and fire alarms
• Automatic Position Reporting System (APRS)
• DGPS systems
• Vehicle data up/download
Technical Summary
• Transmit power: 300mW (24.7dBm)
• Operating frequency: 169.4125MHz, 169.5625MHz
• Supply: 5V (regulated)
• Current consumption: 140mA nominal transmit
• Data bit rate: 3kbps max.
• Size: 43 x 15 x 5mm
Radiometrix Ltd.,
HX1 high power transmitter data sheet
Page 1
1 page  
Applications information
Expected range
Predicting the range obtainable in any given situation is notoriously difficult since there are many
factors involved. The main ones to consider are as follows:
• Type and location of antennas in use
• Type of terrain and degree of obstruction of the link path
• Sources of interference affecting the receiver
• “Dead” spots caused by signal reflections from nearby conductive objects
• Data rate and degree of filtering employed
The following are typical examples – but range tests should always be performed before assuming that
a particular range can be achieved in a given situation:
Data rate
1.2kbps
10kbps
10kbps
10kbps
Tx antenna
half-wave
half-wave
helical
helical
Rx antenna
half-wave
half-wave
half-wave
helical
Environment
rural/open
rural/open
urban/obstructed
in-building
Range
10-15km
3-4km
500m-1km
100-200m
Note: The figure for 1.2kbps assumes that the receiver bandwidth has been suitably reduced by
utilising an outboard sallen-key active audio filter and data slicer or similar arrangement.
Antennas
The choice and positioning of transmitter and receiver antennas is of the utmost importance and is the
single most significant factor in determining system range. The following notes are intended to assist
the user in choosing the most effective antenna type for any given application.
Integral antennas
These are relatively inefficient compared to the larger externally-mounted types and hence tend to be
effective only over limited ranges. They do however result in physically compact equipment and for this
reason are often preferred for portable applications. Particular care is required with this type of
antenna to achieve optimum results and the following should be taken into account:
1. Nearby conducting objects such as a PCB or battery can cause detuning or screening of the antenna
which severely reduces efficiency. Ideally the antenna should stick out from the top of the product
and be entirely in the clear, however this is often not desirable for practical/ergonomic reasons and
a compromise may need to be reached. If an internal antenna must be used try to keep it away from
other metal components and pay particular attention to the “hot” end (i.e. the far end) as this is
generally the most susceptible to detuning. The space around the antenna is as important as the
antenna itself.
2. Microprocessors and microcontrollers tend to radiate significant amounts of radio frequency hash
which can cause desensitisation of the receiver if its antenna is in close proximity. The problem
becomes worse as logic speeds increase, because fast logic edges generate harmonics across the VHF
range which are then radiated effectively by the PCB tracking. In extreme cases system range may
be reduced by a factor of 5 or more. To minimise any adverse effects situate antenna and module as
far as possible from any such circuitry and keep PCB track lengths to the minimum possible. A
ground plane can be highly effective in cutting radiated interference and its use is strongly
recommended.
Radiometrix Ltd.,
HX1 high power transmitter data sheet
Page 5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet HX1-144.800-3.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| HX1-144.800-3 | VHF Narrow Band FM 300mW Transmitter | Radiometrix |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |