The
NRX1 is a VHF radio data receiver and it offers
a low power, reliable data link in a Radiometrix
SIL standard pin out and foot print. It
is an enhanced, low cost version of the Radiometrix
RX1, but in a slightly larger dimension.
NRX1 is compatible with
the TX1 series of transmitters, and the BiM1
transceiver.
Figure 1: NRX1-173.250-10
Features
Designed to comply with harmonised radio
standard EN 300 220-3 and EMC standard
EN 301 489-3
Frequencies
available as standard: 151.3000MHz, 169.4125MHz,
173.2250MHz and 173.2500MHz
Other
custom frequencies from 120MHz to 180MHz
available to order
Data
rates up to 10 kbps with 25kHz channel
spacing
Usable
range to 10km+ with matching transmitter
Fully
screened
NRX1 is a VHF equivalent
of Radiometrix UHF NRX2 receiver and it
is available for licence-exempt operation
in the UK 173MHz bands and European 169MHz
band. It is also available in the Australian
frequency of 151.300MHz. NRX1 modules combine
effective screening with internal filtering
to minimise spurious radiation and susceptibility
thereby ensuring EMC compliance. They are
particularly suitable for one-to-one and
multi-node wireless links where longer ranges
are required at low to moderate data rates.
Applications include building security,
EPOS and inventory tracking, remote industrial
process monitoring and data networks. Because
of their small size and low power consumption,
these modules are ideal for use in battery-powered
portable applications such as handheld terminals.
RF Ground is internally
connected to the module screen and pin 4 (0V). These
pins should be directly connected to the RF return
path - e.g. coax braid, main PCB ground plane etc
3
RSSI
Received Signal Strength
Indicator with >60dB range. DC level between 0.5V
and 2V
4
0V
Ground
5
Vcc
2.9 - 15V DC power
supply
6
AF
500mVpk-pk audio.
DC coupled, approx 0.8V bias
7
RXD
Received Data output
from the internal data slicer. The data is squared
version of the Audio signal on pin 6 and is true data,
i.e. as fed to the transmitter. Output is "open-collector"
format with internal 10kWpull-up
to Vcc (pin 5). Suitable for bi-phase codess
NOTE:
1. Pinout and footprint as RX1
(but larger dimension and lacks Enable pin) and
UHF NRX2.
Condensed
specifications
Frequency
151.3000MHz
169.4125MHz
173.2250MHz
173.2500MHz (other VHF 120-180MHz by special
order)
Frequency
stability
+/- 2.5kHz
Channel
spacing
25kHz
Number
of channels
1
Supply voltage
2.9V - 15V
Current
10mA
Operating temperature
-10 to +60 °C
(Storage -30 to +70 °C)
Size
47 x 17 x 8
mm
Spurious radiations
Compliant with
ETSI EN 300 220-3 and EN 301 489-3
Interface user
5pin 0.1"
pitch SIL
RF
2pin 0.1"
pitch SIL
Sensitivity
-120dBm for
12 dB SINAD
image / spurious
-60dB (or better)
blocking
-86dB (or better)
adjacent Channel
-70dB
LO re-radition
<-65dBm
outputs
Audio, Data,
RSSI
Power on to
valid audio
2ms
Power on to
stable data out (50:50 mark / space)
10ms
Limitation of liability
The information furnished by
Radiometrix Ltd is believed to be accurate and
reliable. Radiometrix Ltd reserves the right to
make changes or improvements in the design, specification
or manufacture of its subassembly products without
notice. Radiometrix Ltd does not assume any liability
arising from the application or use of any product
or circuit described herein, nor for any infringements
of patents or other rights of third parties which
may result from the use of its products. This
data sheet neither states nor implies warranty
of any kind, including fitness for any particular
application. These radio devices may be subject
to radio interference and may not function as
intended if interference is present. We do NOT
recommend their use for life critical applications.
The Intrastat commodity code for all our modules
is: 8542 6000.
R&TTE Directive
After 7 April 2001 the manufacturer
can only place finished product on the market
under the provisions of the R&TTE Directive.
Equipment within the scope of the R&TTE Directive
may demonstrate compliance to the essential requirements
specified in Article 3 of the Directive, as appropriate
to the particular equipment. Further details are available on The Office
of Communications (Ofcom) web site: Licensing
policy manual
