TX1M-XXX-5 [RADIOMETRIX]
VHF Narrow Band FM multi channel radio Transmitter & Receiver; VHF窄带FM多通道无线发射器和接收器
| 型号： | TX1M-XXX-5 |
| 厂家： | 
RADIOMETRIX LTD |
| 描述： | VHF Narrow Band FM multi channel radio Transmitter & Receiver |
| 文件： | 总11页 (文件大小：392K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Radiometrix
Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England
Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233
Issue 3, 19 October2007
TX1M/RX1M
VHF Narrow Band FM multi channel radio Transmitter & Receiver
UK Version: RX1M-173-5/TX1M-173-5 (10mW)
The TX1M transmitter and RX1M receiver
modules offer a low power, reliable data link in
an industry-standard pin out and footprint.
This makes the TX1M/RX1M pair ideally suited
to those low power applications where existing
wideband modules have insufficient range, or
where multi-channel operation is needed in
VHF frequency.
TX1M-151-5
RX1M-151-5
Features
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Conforms to EN 300 220-3 and EN 301 489-3
Any custom band in 60 - 65MHz with 1MHz or 135 - 175MHz with 3MHz (AR0)
frequency range
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Data rates up to 5 kbps for standard module
Usable range over 1km (@100mW)
Fully screened. Low profile
Feature-rich interface (RSSI, automatic noise squelch, analogue and digital baseband)
Incorporate a 1200baud dumb modem
Re-programmable via RS232 interface
Low power requirements
Applications
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Handheld terminals
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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Size: 59 x 38 x 7mm
Operating frequency: 60-65MHz or 135 – 175MHz
128 serial select or 8 parallel select channels
Transmit power: +20dBm (100mW) nominal
Supply range: 4.5V - 15V
Current consumption: 110mA transmit, 13mA receive
Data bit rate: 5kbps max. (standard module)
Receiver sensitivity: -118dBm
Receiver blocking -85dB
(for 12 dB SINAD)
Radiometrix Ltd
TX1M/RX1M Data Sheet
page 1
Radiometrix Ltd
TX1M/RX1M Data Sheet
page 2
Radiometrix Ltd
TX1M/RX1M Data Sheet
page 3
Pin Description – TX1M
Pin: A
1
2
Name
Vcc
Gnd
Function
4.5 – 15V
Ground
Pin: B
Name
Function
1
2
3
Gnd
RF out
Gnd
RF ground
To the antenna
RF ground
Figure 3: TX1M Footprint (Top) view
Pin: C
Name
0V
TXE
TXD
AF in
Function
Ground
1
2
3
4
Transmitter enable. Low = ON, open = off. 4k7 internal pullup to Vcc
DC coupled 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 FM deviation >2.5kHz (>2kHz for 60-65MHz)
DC supply. 75mA maximum drain. Only present when TXE is low
Serial programming/configuration input at RS232 level
Ground
5
6
7
+4.4Vout
PGM
0V
8
9
10
P1 (MOD TXD)
P2 (MOD NC)
P3 (MOD TXH)
Parallel frequency select inputs. Inverted logic, 10k pullups to 4V
Pin Description – RX1M
Pin A
1
2
Name
Vcc
Gnd
Function
4.5-15V
Ground
Pin B
Name
Function
1
2
3
Gnd
RF out
Gnd
RF ground
To the antenna
RF ground
Figure 4: RX1M Footprint (Top) view
Pin C
Name
Function
1
2
3
4
5
6
RSSI
SQF
AF out
RXD
+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
200mVpk-pk audio. DC coupled, approx 1V bias. Muted by squelch
Open collector output of data slicer. Need external pull-up
DC supply. 75mA maximum drain. Present if unit is powered.
Ground
7
PGM
Serial programming/configuration input at RS232 level
8
9
10
P1 (MOD NC)
P2 (MOD RXD)
P3 (MOD CDE)
Parallel frequency select inputs. Inverted logic, 10K pullups to 4V
NOTES:
1. Internal AF Input gain is factory set for 1Vpk-pk to produce 3kHz peak deviation and minimum
distortion. Analogue gain may be set for an input level of 50mV – 2V pk-pk. This cannot be done
without appropriate test equipment. Contact factory for details
2. Carrier detect on RX1M mutes the AF and RXD outputs when RF input signal is <-123dBm.
This can be factory disabled if required.
3. There are no pullups on the open collector outputs. External pull-up resistor should be used.
4. With 1200baud modem mode enabled, parallel selection of channel is unavailable as the P1-P3 lines
are used for input/output operations.
Radiometrix Ltd
TX1M/RX1M Data Sheet
page 4
TX1M and RX1M serial interface commands
2400 baud at RS232 level. 8 bit data, no parity, 1 start bit, 1 or 2 stop bits, No flow control.
Transmit (pin 3 on DB9) and Signal Ground (pin 5 on DB9) should be connected to PGM and 0V pin.
Command
Format
Description
SINGLE nnnnn
GOCHAN xx
LOADMX xx
LOADaa nnnnn
LOADTB nnnnn
RVALUE rrrr
SETPAR
SETSER
SETMOD
<CR>
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
Process entry (Carriage Return = 0D hex )
/
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)
fRF
173.250MHz
25kHz
fTCXO
13MHz
NTX
=
=
=
= 6930
R =
=
, So R=520
fChannelspacing
fchannelspacing 25kHz
fRF − 21.4MHz
171.250MHz − 21.4
25kHz
NRX
=
= 6140
fChannelspacing
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.
Radiometrix Ltd
TX1M/RX1M Data Sheet
page 5
Pin description of TX1M/RX1M with Modem mode selected
The 'modem' mentioned is a 1200 baud RS232 semi-intelligent unit (Transmitter is enabled when valid
serial data is present, so no separate Transmit Enable control is needed. Coding in the data stream also
permits the receiver to ignore noise and only output valid serial data.
Pin Description – TX1M
Pin
1
Name
0V
Function
Ground
2
3
TXE
N/C
Must be tied to 0V
4
N/C
5
6
7
+4.4Vout
PGM
0V
DC supply. 75mA maximum drain. Only present when TXE is low
Serial programming/configuration input at RS232 level
Ground
8
9
MOD TXD (P1) Serial data input at RS232 level
MOD N/C (P2)
10
MOD TXH (P3) Active Low Transmit Hold for continuous transmission (useful for test)
Pin Description – RX1M
Pin
Name
Function
1
RSSI
DC level between 0.5V and 2.5V. 60dB dynamic range
(only valid during databursts)
2
N/C
3
N/C
(modem tones or noise present)
4
N/C
(modem tones or noise present)
5
6
+4.4V out
0V
DC supply. 75mA maximum drain. Present if unit is powered
Ground
7
PGM
Serial programming/configuration input at RS232 level
8
MOD N/C (P1)
9
MOD RXD (P2) Modem Received Data at TTL level (requires RS232 driver)
10
MOD CDE (P3) Pull low to enable Carrier Detect on modem operation (not recommended)
Both the TX1M and the RX1M 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.
Antenna
Antenna
0V (C1)
NC (C2)
TXE (C2)
TX1M
PC serial port
PC serial port
+4.4V out (C5)
GND (C6)
4.4V 0ut (C5)
PGM (C6)
1
2
2400bps
1200bps
1
6
2
6
SW1
RX1M
GND(C7)
RXD
PGM (C7)
2400bps
7
8
9
3
7
8
9
3
TXD
100kΩ
TXD
SGD
MOD TXD
MOD RXD (C9)
uC
UART
1200bps
4
100k
Ω
(C8)
4
5
VDD
µC
MAX232
SGD
5
NPN
UART
4.5 - 15V
4.5 - 15V
Figure 5: TX1M and RX1M interfaced to PC serial port in modem mode
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
For TX1M, TXD (Pin 3) of a Serial Port can be switched from PGM (Pin C6) to MOD TXD (Pin C8) with
no RS232 driver in between. However, in RX1M, MOD RXD (Pin C9) 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 C5).
Radiometrix Ltd
TX1M/RX1M Data Sheet
page 6
Condensed specifications
Frequency
TX1M/RX1M: any 1MHz from 60 - 65MHz
TX1M: any 3MHz band from 135-175MHz
RX1M: any 2MHz band from 130-180MHz
Frequency stability
+/- 1.5kHz
Channel spacing
Number of channels
25kHz (12.5kHz by special order)
128 channels controlled via RS232 interface (8 parallel selected)
Operating temperature
Size
-10 to +60 ºC (Storage -30 to +70 ºC)
59 x 38 x 7 mm
Spurious radiations
Compliant with ETSI EN 300 220-3 and EN 301 489-3
Interface
User
8pin 0.1" pitch molex
2pin 0.1" pitch molex
3pin 0.1" pitch molex
Power
RF
Transmitter
Output power
+20dBm(100mW) ± 1dB (factory adjustable 10 - 200mW)
TX on switching time
Modulation type
TX modulation bandwidth
FM deviation
Adjacent channel TX power
Spurii
50 ms
FM, FSK (F1D, F3D)
DC – 3kHz
> ±2.5kHz (>±2kHz for 60 - 65MHz)
-37dBm
<-40dBm
Inputs
analogue, data (CMOS/TTL compatible)
Supply
Voltage
Current
4.5 - 15V
@ 10mW :
50mA
@ 100mW: 110mA
@ 200mW: 150mA
Receiver
Sensitivity
-118dBm for 12 dB SINAD (for 135-175MHz)
-117dBm for 12 dB SINAD (for 60-65MHz)
image / spurious
Blocking
-70dB
-85dB
adjacent channel
Spurious radiations
Outputs
<-65dB (Tested per. ETSI EN 301 489-3, squelch disabled)
<-60dBm
RSSI, carrier detect, audio, data
4.5 - 16V
13mA
Supply
Voltage
Current
Power on to valid audio
28ms (no noise mute)
45ms (with noise mute)
Power on to stable data out
50ms (with or without mute) for 50:50 mark / space
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
3
For UK version the following channel assignment is supplied:
Channel
Frequency (MHz)
0
1
2
173.250
173.275
173.300
173.325
3
4 -7
8 - 127
173.225 (only used for alarm applications)
173.325
Radiometrix Ltd
TX1M/RX1M Data Sheet
page 7
4
For Australian version the following channel assignment is supplied:
Channel
Frequency (MHz)
150.825
150.850
150.875
150.900
150.925
150.950
150.975
151.000
151.025
151.050
151.075
151.100
151.125
151.150
151.175
151.200
151.225
N vlaue
0
1
2
3
4
5
6
7
8
/LOAD 00 6033
/LOAD 01 6034
/LOAD 02 6035
/LOAD 036036
/LOAD 04 6037
/LOAD 05 6038
/LOAD 06 6039
/LOAD 07 6040
/LOAD 08 6041
/LOAD 09 6042
/LOAD 10 6043
/LOAD 11 6044
/LOAD 12 6045
/LOAD 13 6046
/LOAD 14 6047
/LOAD 15 6048
/LOADTB 6049
9
10
11
12
13
14
15
16
17 - 65
in sequence starting at CH 17 (151.250)
Operating principle of internal modem
This device is a simplex link handling a 1200 baud asynchronous datastream (1 start, 8data, 1stop).
Buffering in the transmit end handles TX startup timing requirements, while the presence of sync
codes in the transmitted bursts prevents the receiver from outputting garbage in the presence of noise.
No error correction or retransmission of lost packets is supported. To operate with proper +/-12V RS232
levels an external buffer (such as a MAX232) will be needed
Physically the modem code resides in the PIC microcontroller which controls the radio functions. The
modem uses the internal hardware serial port of the processor.
Operation: Serial interface
Both transmit and receive modems implement a 32 byte software FIFO. At the transmit end this is
used to allow for the TX1M transmitter start up time (about 32mS), while on receive it buffers arriving
packets to the constant output data rate. All timing and data formatting tasks are handled by the
software. The user need not worry about keying the transmitter before sending data: the link is entirely
transparent.
For transmission across the link data is formatted into packets, each comprising 3 bytes of data and a
sync code. If less than 3 bytes are in the transmit end FIFO then a packet is still sent, but idle state
replaces the unused bytes. When the transmit end FIFO is completely emptied, then the transmitter is
keyed off .
Operation: Radio interface
Raw data is not fed to the radios. A coding operation in the transmit software, and decoding in the
receiver, isolate the AC coupled, potentially noisy baseband radio environment from the datastream.
The radio link is fed a continuous tone by the modem. As in biphase codes, information is coded by
varying the duration consecutive half-cycles of this tone. In our case half cycles of 500µs (a long, or L)
and 250µs (a short, or S) are used. In idle (or 'preamble') state, a sequence of Ls is sent (resembling a
1kHz tone).
A packet comprises the Synchronising (or address) part : LSSSSSSSSSSSSL followed by the Data part,
made up of twelve Groups (of four half cycles duration). Each Group encodes 2 data bits, so one byte is
encoded by 4 Groups. Although there are 16 possible states for a four half cycle group (from SSSS to
LLLL), only four of the possible states are used for valid data:
All other possible group combinations (except LLLL) are void, and result in the entire packet being
rejected by the receiver software as a noise artifact. Idle state tone (LLLL ....) is decoded as null data,
but does not void the packet, as a packet containing less than 3 bytes still needs to be decoded.
Radiometrix Ltd
TX1M/RX1M Data Sheet
page 8
Application circuits
Ante nna
Ante nna
ADC or
µ
A me te r
RSSI (C1)
SQF (C2)
0V (C1)
Tra nsm it Ena b le
TXE (C2)
CD
AF out (C3)
RXD (C4)
+ 4.4V out (C5)
GND (C6)
PGM (C7)
P1 (C8)
TXD (C3)
AF in (C4)
+ 4.4V out (C5)
PGM (C6)
GND(C7)
P1 (C8)
Da ta out
TX
1kΩ
1
1
6
+ 4.4V
100nF
6
7
8
9
2
3
2
7
Pa ra lle l
Cha nne l
Se le c t
3
Pa ra llel
Cha nne l
Se le ct
TXD
TXD
4.5 - 15V
4.5 - 15V
P2 (C9)
P2 (C9)
8
9
4
5
4
5
P3 (C10)
P3 (C10)
SGD
SGD
Figure 6: Test circuit of TX1M and RX1M
TX1M/RX1M 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 C7) of the TX1M/RX1M and
SGN (pin 5) of DB9M connector should be connected to common ground pins.
The whole frequency/channel table is user reconfigurable to 128 channels within 2MHz band of
supplied frequency subject to regulatory band limits.
Ante nna
Ante nna
0V (C1)
SQF (C2)
ADC
0V (C1)
Tra nsmit Ena ble
Da ta Out
TXE (C2)
TXD (C3)
AF in (C4)
+ 4.4V out (C5)
PGM (C6)
GND(C7)
P1 (C8)
AF out (C3)
RXD (C4)
+ 4.4V out (C5)
GND (C6)
PGM (C7)
P1 (C8)
CD
TX
Da ta In
VDD
1kΩ
1
1
6
7
8
9
6
7
8
9
2
2
3
100nF
3
TXD
TXD
Pa ra llel
Cha nnel
Sele ct
Pa ra llel
Cha nnel
Selec t
4.5 - 15V
4.5 - 16V
4
5
P2 (C9)
4
5
P2 (C9)
P3 (C10)
P3 (C10)
SGD
SGD
PC se ria l p ort
PC se ria l p ort
Figure 7: TX1M and RX1M interfaced to host microcontroller and serial port for configuration
TX1M and RX1M can be directly interfaced to a host microcontroller which can generally be powered by
the regulated +4.4V output on pin 5. 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 TX1M and RX1M have internal pull-up to 4V supply
rail, hence channel selection operate on inverted logic.
Digital Received Data Output (RXD) pin on the RX1M is an open collector output, which should be
pulled-up to required voltage swing level (e.g. +4.4V or Vcc).
RX1M 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. 1kΩ)
according to the current requirement to produce satisfactory brightness on the LED used.
Radiometrix Ltd
TX1M/RX1M Data Sheet
page 9
Transmitter variant
RX1M in 135-175MHz is designed to be pin and polarity compatible with existing industry standard
modules. AF and Data Output are inverted relative to original transmitted signal. However, RX1M in
60-65MHz band does not invert the baseband sense.
The transmitter in 135-175MHz is available in two variants – TX1I and TX1M
The non-inverting transmitter called TX1M frequency modulates the carrier frequency in the normal
sense whereby higher modulating voltage increases the carrier frequency and lower modulating voltage
decreases the carrier frequency which results in an inverted AF and Data output on the receiver. This
will be the standard module and exact plug-in replacement for existing industry standard modules.
No
modulation
Vcc
AF
Data slicer
RXD
0V
3V
TX1M
RX1M
Figure 8: Data polarity change from TX1M (non-inverting) transmitter to RX1M receiver
The inverting transmitter called TX1I reverses the Frequency Modulating order whereby the higher
modulating voltage decreases the carrier frequency and lower modulating voltage increases carrier
frequency which results in non-inverting AF and Data output on the receiver. This variant can be used
for applications where data inversion will be problematic.
No
modulation
Vcc
AF
Data slicer
RXD
3V 0V
TX1I
RX1M
Figure 9: Data polarity change from TX1I (inverting) transmitter to RX1M receiver
Ordering information
Part Number
TX1M-xxx-5
RX1M-xxx-5
Description
TX1M transmitter
RX1M receiver
Frequency band
Where xxx is any 1MHz
band from 60-65MHz
Maximum data rate
5kbps
5kbps
TX1M-xxx-5
TX1I-xxx-5
RX1M-xxx-5
TX1M-xxx-10
TX1I-xxx-10
RX1M-xxx-10
TX1M (non-inverting) transmitter
TX1I (inverting) transmitter
RX1M receiver
TX1M (non-inverting) transmitter
TX1I (inverting) transmitter
RX1M receiver
5kbps
5kbps
5kbps
10kbps
10kbps
10kbps
Where xxx is any 3MHz
band from 135-175MHz
for TX1M and any
2MHz band from 130-
180MHz for RX1M
Radiometrix Ltd
TX1M/RX1M Data Sheet
page 10
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 wholeor
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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PANASONIC
TX2-1.5V-Z
Power/Signal Relay, 2 Form C, DPDT, Momentary, 0.094A (Coil), 1.5VDC (Coil), 140mW (Coil), 2A (Contact), 220VDC (Contact), DC Input, Random, DC Output, Through Hole-Straight Mount,
PANASONIC
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