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VX2M-458-5

型号：

VX2M-458-5

品牌：

RADIOMETRIX[ RADIOMETRIX LTD ]

页数：

9 页

PDF大小：

769 K

下载PDF手册
Hartcran House, 231 Kenton Lane, Harrow, Middlesex, HA3 8RP, England  
Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233, www.radiometrix.com  
Issue 1, 05 February 2019  
VX2M  
NBFM Vibration resistant Category 1 Multi-channel Transceiver  
VX2M is a 400MHz band transceiver conforming to the  
Radiometrix TR2M pinout. It uses a sophisticated  
combination of techniques to produce a very robust  
device with excellent resistance to vibration.  
It meets the ETSI Category 1 high performance receiver  
specification to be used where the operation of a SRD  
may have inherent safety of human life implications.  
It retains all the pin-functions of the parent TR2M  
(including noise operated squelch/carrier detect and  
separate digital/analogue inputs and outputs). It also  
supports the same internal i1200 modem as the TR2M.  
Figure 1: VX2M-458-5  
Features  
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Conforms to EN 300 220-3 and EN 301 489-3  
ETSI EN 300 220-1 Category 1 High performance level receiver  
Any 3MHz band module from 400MHz to 475MHz available as factory tuned custom variant  
High performance double superhet, 128 channel PLL Synthesizer with TCXO  
Data rates up to 5 kbps for standard module  
Usable range over 1km (with 100mW variant)  
Fully screened  
Feature-rich interface (RSSI, automatic noise squelch, analogue and digital baseband)  
Incorporates a 1200baud dumb modem  
User configurable via RS232 interface  
Applications  
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Handheld terminals  
Heavy vehicle/machine remote controls  
EPOS equipment, barcode scanners  
Data loggers  
Industrial telemetry and telecommand  
In-building environmental monitoring and control  
High-end security and fire alarms  
Vehicle data up/download  
Technical Summary  
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Operating frequency: 458.5-459.1MHz or 433.05-434.79MHz  
Custom variants from 400MHz to 475MHz on any 3MHz band  
23 channels in 458MHz band, 69 channels in 433MHz band (128 channels max.)  
Transmit power: +20dBm (100mW) nominal  
Supply range: 4.5V - 16V  
Current consumption: 130mA transmit, 50mA receive  
Data bit rate: 5kbps max. (standard module)  
Receiver sensitivity: -118dBm (for 12 dB SINAD)  
Size: 59 x 38 x 10mm  
Evaluation platforms: NBEK + xx2M Series carrier  
Radiometrix Ltd  
VX2M Data Sheet  
page 1  
Radiometrix Ltd  
VX2M Data Sheet  
page 2  
A: 1 Vcc  
A: 2 Gnd  
B: 1 RFGnd  
B: 2 RFin  
59mm  
3.1mm  
A
1
B: 3 RFGnd  
C: 1 TXE(MOD TX_ON)  
C: 2 TXD (MOD NC)  
C: 3 AFin (MOD NC)  
C: 4 RSSI  
C: 5 SQF(MOD NC)  
C: 6 AFout  
C: 7 RXD (MOD NC)  
C: 8 + 4.4V out  
C: 9 0V  
8.9 mm  
Squelch adj.  
Input gain.  
C: 10 PGM  
1
C: 11 P1 (MOD TXD)  
C: 12 P2 (MOD RXD)  
C: 13 P3 (MOD NC)  
C
Unit height  
10mm  
B
53.3mm  
Figure 3: VX2M Footprint (Top) view  
Pin Description - VX2M  
Pins  
A1  
A2  
Name  
Vcc  
GND  
Function  
4.5V-16V  
Ground  
B1  
B2  
B3  
RF GND  
RF  
RF GND  
RF ground  
To the antenna  
RF ground  
C1  
TXE (MOD TX_ON)  
Transmitter Enable. Low = ON, Open = RX mode. Internal 10kpull-up to  
4V  
C2  
C3  
TXD (MOD NC)  
AF in (MOD NC)  
DC coupled digital data input for 3-12V CMOS logic. Leave open if unused  
AC coupled Analogue Input Limit to 1Vpk-pk 10% to keep distortion <1.5%  
and peak deviation >2.5kHz  
C4  
C5  
C6  
C7  
C8  
C9  
RSSI  
SQF (MOD NC)  
AF out  
RXD (MOD NC)  
+4.4V out  
0V  
DC level between 0.5V and 2.5V. 60dB dynamic range  
Noise operated carrier detect. Open collector. ON/low = no signal  
600mVpk-pk audio. DC coupled, approx 1V bias. Muted by squelch  
Open collector output of data slicer suitable for Biphase codes  
Regulated DC supply. 75mA max. drain. Present if unit is powered  
Ground  
C10  
C11  
C12  
C13  
PGM  
Serial programming/configuration input at RS232 level  
P1 (MOD TXD)  
P2 (MOD RXD)  
P3 (MOD NC)  
Parallel frequency select inputs. Inverted logic, internal 10kpullups to 4V  
Notes:  
1. Carrier detect on VX2M mutes the AF Out and RXD outputs. It can be factory disabled.  
2. All the open collector outputs must be connected to Vcc/+4.4V out via a pull-up resistor.  
3. The software incorporates a 1200baud dumb modem, compatible with that implemented in TX2M,  
RX2M radios (I1200 tones and format)  
4. With 1200baud modem mode enabled, parallel selection of channel is unavailable as the P1-P3 lines  
are used for modem input/output operations.  
5. PGM and MOD TXD (pin 10 and 11) tolerate true ±RS232 levels. No buffering is required.  
Radiometrix Ltd  
VX2M Data Sheet  
page 3  
VX2M can be directly interfaced to a host microcontroller which can generally be powered by the regulated  
+4.4V output on pin 8 of VX2M. Three I/O pins on the microcontroller port can be assigned to select the first  
8 channels on frequency table of the appropriate band for which the module is configured by pulling the P1-  
P3 pins low. Channel select pins of VX2M have internal pull-up to 4V supply rail, hence channel selection  
operate on inverted logic.  
Channel  
P3:P2:P1  
111  
110  
101  
100  
011  
010  
001  
000  
433MHz band  
433.050  
433.075  
433.100  
433.125  
433.150  
433.175  
433.200  
433.225  
458MHz band  
458.525  
458.550  
458.575  
458.600  
458.625  
458.650  
458.675  
458.700  
0
1
2
3
4
5
6
7
Digital Received Data Output (RXD) pin is an open collector output, which should be pulled-up to required  
voltage swing level (e.g. +4.4V or Vcc).  
VX2M has an automatic noise squelching function which is activated when there is not any RF signal at  
detectable level on the channel or if the non-coherent noise like interference level is high enough to block  
any weak RF signal from being received. SQF is provided as an open-collector output for monitoring which  
should be pulled-up to required voltage swing level. SQF output will jump to pull-up voltage level if received  
RF signal level at the RF In/Out pin of the module is about 3dB below the level required to produce 12dB  
SINAD level on demodulated AF Output signal. SQF pin can be connected to an LED to act as a Carrier  
Detect indicator. Pull-up resistor value should be reduced (e.g. 1k) according to the current requirement to  
produce satisfactory brightness on the LED used.  
VX2M can be configured using any PC/Laptop/PDA having a serial port and modem/terminal program. TXD  
(pin 3) of DB9M connector can be directly wired to PGM (pin C10) of the VX2M and SGN (pin 5) of DB9M  
connector should be either connected to common ground or pin C9 of the VX2M.  
The whole frequency/channel table is user reconfigurable to 128 channels within 5MHz band of supplied  
frequency subject to regulatory band limits. Serial Channel Selection via PGM pin gives access to the whole  
of regulatory band allocation for 433.05MHz - 434.790MHz (69 channels) or 458.525MHz - 458.925MHz (23  
channels).  
Radiometrix Ltd  
VX2M Data Sheet  
page 4  
Received Signal Strength  
2.5  
2.3  
2.1  
1.9  
1.7  
1.5  
1.3  
1.1  
0.9  
0.7  
0.5  
-130 -120 -110 -100  
-90  
-80  
-70  
-60  
-50  
-40  
RF Level (dBm)  
Figure 4: RSSI voltage variation with respect to RF level at VX2M  
If the microcontroller has a built-in Analogue to Digital Converter (ADC), the Received Signal Strength  
Indicator (RSSI) output voltage level can be read by the microcontroller to estimate its distance from  
transmitting VX2M unit or identify areas of weak signal reception.  
RSSI can also be used to make a decision to switch to the second antenna in fixed installations within  
building where the probability of null-spots are higher.  
Regulatory Restrictions  
There is a generic 10% duty cycle restriction on the 433MHz ISM band through out European countries with  
few exceptions. Annex 1 Band E, Band E2 of European Radio Communications Committee (ERC)  
Recommendation 70-03 dated February 2004 specifies the following:  
433.050MHz (Ch0)  
434.050MHz (Ch40)  
10mW ERP, 10% duty cycle  
433.775MHz (Ch69)  
for Channelised Narrow Band and Wide Band usage  
10mW ERP, 100% duty cycle  
for <25kHz Channelised Narrow Band usage  
433.05MHz  
434.040MHz  
434.79MHz  
433.050 - 434.790 MHz, Non Specific Short Range Device, band is primarily intended for Telemetry,  
Telecommand, Alarms, Data in general and other similar applications. Audio and Voice signals should be  
avoided in the band.  
Radiometrix Ltd  
VX2M Data Sheet  
page 5  
VX2M serial configuration commands  
2400 baud RS232. 8 bit data, no parity, 1 start bit, 1 or 2 stop bits, No flow control  
SINGLE  
nnnnn  
Set value of N for single channel operation  
Serial select of channel xx (0 to 127)  
Set highest permitted (serial selected) channel xx (others default to ch0)  
Set value of N for channel aa (channels 0 to 15)  
Set value of N for channel 16 (channels 17 to 127 then in sequence)  
Enter value for R register  
Channel selected by 3 bit parallel input (0 to 7). Disable modem  
Channel selected by most recent 'gochan' operation  
Enable internal modem. Frequency selected by most recent 'gochan' or 'single'  
250Hz test tone transmission  
GOCHAN xx  
LOADMX xx  
LOAD aa nnnnn  
LOADTB nnnnn  
RVALUE rrrr  
SETPAR  
SETSER  
SETMOD  
GOTEST  
OFFSET ooo  
<cr>  
Set receive frequency offset (for 25KHz this is 1800)  
Process entry  
/
Clear all buffers  
xx = channel number from 00 to 127  
aa = two digit channel number from 00 to 15  
nnnnn = synthesizer N register value, (up to 65535)  
rrrr = synthesizer R register value, (up to 16383)  
000 = frequency offset  
fRF  
433.050MHz  
25kHz  
fTCXO  
13MHz  
NTX  
=
=
= 17322  
R =  
=
, So R=520  
fChannelspacing  
fchannelspacing 25kHz  
IF  
45MHz  
RX OFFSET =  
=
= 1800  
fchannelspacing 25kHz  
Channel  
433MHz band  
N value for TX  
458MHz band  
N value for TX  
Number  
0
1
2
3
4
5
6
7
8
433.050  
433.075  
433.100  
433.125  
433.150  
433.175  
433.200  
433.225  
433.250  
433.275  
433.300  
433.325  
433.350  
433.375  
433.400  
433.425  
433.450  
434.775  
/LOAD00 17322  
/LOAD01 17323  
/LOAD02 17324  
/LOAD03 17325  
/LOAD04 17326  
/LOAD05 17327  
/LOAD06 17328  
/LOAD07 17329  
/LOAD08 17330  
/LOAD09 17331  
/LOAD10 17332  
/LOAD11 17333  
/LOAD12 17334  
/LOAD13 17335  
/LOAD14 17336  
/LOAD15 17337  
/LOADTB 17338  
/LOADMX 69  
458.525  
458.550  
458.575  
458.600  
458.625  
458.650  
458.675  
458.700  
458.725  
458.750  
458.775  
458.800  
458.825  
458.850  
458.875  
458.900  
458.925  
459.100  
/LOAD00 18341  
/LOAD01 18342  
/LOAD02 18343  
/LOAD03 18344  
/LOAD04 18345  
/LOAD05 18346  
/LOAD06 18347  
/LOAD07 18348  
/LOAD08 18349  
/LOAD09 18350  
/LOAD10 18351  
/LOAD11 18352  
/LOAD12 18353  
/LOAD13 18354  
/LOAD14 18355  
/LOAD15 18356  
/LOADTB 18357  
/LOADMX 23  
9
10  
11  
12  
13  
14  
15  
16  
F max  
25kHz  
433.05  
434.79  
433MHz Band  
458MHz  
Band  
459.1  
461.675  
Figure 5: Maximum regulatory and user accessible sequential channels  
Radiometrix Ltd  
VX2M Data Sheet  
page 6  
Notes:  
1. A pause of at least 50ms must be allowed between command strings (EEPROM programming time)  
SINGLE mode does not store the N value in EEPROM. Therefore the unit is inoperative after a  
power down until either another valid SINGLE command is received, or mode is changed by a  
GOCHAN, SETPAR or SETSER command. SINGLE mode is intended for frequency agile  
applications.  
2. /SETPAR command should be issued at the end of channel programming to put the module back  
into parallel frequency select mode  
3. In 458MHz band, channel 12 (458.825MHz) and channel 15 (458.900MHz) are allocated specifically  
for fixed alarm and radio keys/vehicle paging applications respectively and should not be used for  
general purpose applications.  
4. User can modify the frequency table of 128 channels to any desired frequency by changing N, R  
values of synthesizer within 1.5MHz of factory set Channel 0 frequency subject to the Radio  
Regulatory Band Allocation in the country of intended use.  
5. All other frequency, power, analogue input gain and automatic noise squelching adjustment will be  
treated as custom variants of the module to be set by factory.  
Pin description of VX2M with Modem mode selected  
The 'modem' mentioned is a 1200 baud RS232 semi-intelligent unit (Transmit keyed when valid serial data is  
present, so no separate TX control needed. Coding in the datastream also permits the receiver to ignore  
noise and only output valid serial data). This is a half duplex unit, so collisions between transmitted and  
received packets must be dealt with by the user.  
Pin  
1
Name  
Function  
MOD TX_ON Open = normal modem operation. Low = constant TX (for test). 10k pullup to 4V  
2
3
4
5
MOD NC  
MOD NC  
RSSI  
MOD NC  
AF out  
Leave open  
Leave open  
DC level between 0.5V and 2.5V. 60dB dynamic range  
Leave open  
Modem tones or noise present  
6
7
NC  
Leave open  
8
9
+4.4V out  
0V  
Regulated DC supply. 75mA max. drain. Present if unit is powered  
Ground  
10  
11  
12  
13  
PGM  
Serial programming/configuration input at RS232 level  
RS232 data input (true). 10k pullup to 4V  
Inverted RS232 data out (to inverting buffer like MAX232)  
Leave open  
MOD TXD  
MOD RXD  
MOD NC  
VX2Ms on both ends should be configured to required operating frequency using GOCHAN command before  
starting to use the internal 1200 baud modem, because the P1-P3 pins will be used as Modem Data pins  
and the modem will operate on the last serially selected channel after SETMOD command is used to enable  
the Modem.  
Note:  
Baud rate used for Modem is half that of used for serial configuration. Attached RS232 devices should be set  
with the following:  
1200bps, 8 Data bits, No Parity, 1/2 stop bits, no flow control  
TXD (Pin 3) of a Serial Port can be switched from PGM (Pin C10) to MOD TXD (Pin C11) with no RS232  
driver in between. However, MOD RXD (Pin C12) requires an RS232 line driver before it can be connected  
to RXD (pin 2) of a serial port. Some of the RS232 line drivers can be powered from the regulated +4.4V out  
(Pin C8).  
Radiometrix Ltd  
VX2M Data Sheet  
page 7  
Condensed specifications  
Frequency  
458.5-459.1MHz or 433-434MHz (any 3MHz band from 400-475MHz)  
+/- 1.5kHz  
25kHz (12.5kHz by special order)  
Frequency stability  
Channel spacing  
Number of channels  
128 channels controlled via RS232 interface (8 parallel selected)  
Supply  
voltage  
Current  
4.5 - 16V  
130mA nominal transmit  
50mA receive  
Operating temperature  
Size  
-20 to +70 οC (Storage -30 to +70 οC)  
59 x 38 x 10 mm  
Spurious radiations  
Interface  
Compliant with ETSI EN 300 220-3 and EN 301 489-3  
user  
Power  
RF  
13pin 0.1" pitch molex  
2pin 0.1" pitch molex  
3pin 0.1" pitch molex  
1.2mm (min.)  
Recommended PCB hole size  
Intended approval  
ETSI Radio standard EN 300 220-3 and EMC standard EN 301 489-3  
Transmitter  
Output power  
+20dBm (100mW) ±1dB (factory adjustable 1-100mW)  
< 15 ms  
FM, FSK (F1D, F3D)  
DC – 3kHz  
<-37dBm (<200nW)  
TX on switching time  
Modulation type  
TX modulation bandwidth  
Adjacent channel TX power  
TX spurii  
better than -40dBm  
Inputs  
analogue, data (CMOS/TTL compatible)  
Receiver  
Sensitivity  
-118dBm for 12 dB SINAD (-115dBm for 12 dB SINAD for 12k5 variant)  
adjacent channel  
-910kHz spurios  
½ IF  
65dB  
69dB  
>80dB  
image / spurious  
blocking  
>80dB  
86dB or better  
Outputs  
Power on to valid audio  
Power on to valid audio  
Power on to stable data out  
(50:50 mark / space)  
RSSI, carrier detect, audio, data  
28ms (no noise mute)  
45ms (with noise mute)  
50ms (with or without mute)  
Switching time (TX→ RX and  
RX→ TX)  
Under 15ms (no noise mute)  
Notes: 1. The data slicer cannot be depended upon for data waveform frequencies below 250Hz  
2. When RX is on and a transmitter keys up, again a 50ms period is required to stabilise data output  
mark/space. i.e. allow at least 50ms of preamble  
Ordering information  
Part No.  
VX2M-433-5  
VX2I -433-5  
Description  
VX2M transceiver (non inverted RXD output) 433.05MHz - 434.790MHz  
VX2I transceiver (inverted RXD output) 433.05MHz - 434.790MHz  
Frequency band  
Data rate (max)  
5kbps  
5kbps  
VX2M-458-5  
VX2I-458-5  
VX2M transceiver (non inverted RXD output) 458.525MHz - 459.100MHz  
VX2I transceiver (inverted RXD output)  
5kbps  
5kbps  
VX2M-458-10  
VX2I-458-10  
VX2M transceiver (non inverted RXD output) 458.525MHz - 459.100MHz  
10kbps  
10kbps  
VX2I transceiver (inverted RXD output)  
458.525MHz - 459.100MHz  
Radiometrix Ltd  
VX2M Data Sheet  
page 8  
Radiometrix Ltd  
Hartcran House  
231 Kenton Lane  
Harrow, Middlesex  
HA3 8RP  
ENGLAND  
Tel: +44 (0) 20 8909 9595  
Fax: +44 (0) 20 8909 2233  
sales@radiometrix.com  
www.radiometrix.com  
Copyright notice  
This product data sheet is the original work and copyrighted property of Radiometrix Ltd. Reproduction in  
whole or in part must give clear acknowledgement to the copyright owner.  
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:  
http://www.ofcom.org.uk/radiocomms/ifi/  
Information Requests  
Ofcom  
European Radiocommunications Office (ERO)  
Peblingehus  
Riverside House  
Nansensgade 19  
2a Southwark Bridge Road  
London SE1 9HA  
Tel: +44 (0)845 456 3000 or 020 7981 3040  
Fax: +44 (0)20 7783 4033  
information.requests@ofcom.org.uk  
DK 1366 Copenhagen  
Tel. +45 33896300  
Fax +45 33896330  
ero@ero.dk  
www.ero.dk  
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