Data Sheet(pdf)

W
E
N
Radiometrix
Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England
Issue A, 20 November 2007
UHX1-xxx-5
Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233
PRELIMINARY DATA SHEET
NBFM Multichannel 500mW VHF Transceiver
UHX1 is small dual frequency multichannel VHF transceiver with up to
500mW RF power output.
The dual frequency capability allows
UHX1’s transmitter section to be
operated on one frequency while
receiver frequency on another.
Features
Figure 1: UHX1-144-5
Conforms to ETSI EN 300 220-3 and EN 301 489-3
High performance double superhet, 128 channel PLL synthesizer
500mW RF power output: adjustable via serial command
Data rates up to 5 kbps for standard module
Usable range over 1km
Fully screened. Low profile
Feature-rich interface (RSSI, analogue and digital baseband)
Digital RSSI output
Incorporate a 1200baud modem
Re-programmable via RS232 interface
Low power requirements
Applications
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
Operating frequency: Any 2MHz segment in 140- 175MHz
128 channels selected by serial interface
16 channels selected by parallel interface
Transmit power: 500mW (+27dBm) nominal. Adjustable 1 – 500mW
Supply range: 5V regulated transmit, 3.1 - 15V receive,
Current consumption: 330mA (at 500mW output) transmit, 25mA receive
Data bit rate: 5kbps max. (standard module)
Receiver sensitivity: -118dBm (for 12 dB SINAD)
Size: 67 x 30 x 12mm
Radiometrix Ltd
UHX1 Data Sheet (preliminary)
page 1
Figure 2: UHX1 block diagram
Radiometrix Ltd
UHX1 Data Sheet (preliminary)
page 2
Figure 3: Provisional UHX1 footprint
Pin Description
Pins
Normal mode
Serial mode
RF
1A
2A
3A
4A
5A
6A
User
1
2
RF Gnd
RF in/out
RF Gnd
GND
GND
Vcc (TX)
RF ground
To the antenna
RF ground
0V
0V
5V regulated supply for TX
TXD
TXE
3
4
5
6
7
8
9
GND
Vcc
P3
P2
P1
P0
RSSI
DC coupled input for TTL/ CMOS logic
Transmit enable.
Low = TX mode
0V
DC supply input (3.1 –15V) for receiver
Parallel channel select MSB
Parallel channel select
Parallel channel select
Parallel channel select LSB
DC level between 0.5V and 2.5V. 60dB dynamic
range
Open collector output of data slicer
500mV p-p audio. DC coupled, approx 0.8V bias
Modem
mode
NC
NC
Serial read back
TBA
TBA
PGM in
BUSY
MOD TXD
MOD RXD
PGM in
10
RXD
NC
11
AF out
NC
NOTES:
1. No inversion occurs between TXD and RXD. However, AF out is inverted relative to mod in.
2. P0 - P3 (parallel channel selects) and TXE are active LOW and have internal 47K pullups to 3v.
3. Open collector output RXD has a 47K pullup to 3v.
4. The software incorporates a 1200baud dumb modem, compatible with that implemented in
other Radiometrix narrowband units ( i1200 tones and format ). Modem operation is selected by
a serial command.
5. Main serial port (P0-P3) operates at 9600 baud. (Command set is not the same as TR2M, SMX
families). The unit is capable of operating in 'basic' parallel channel select only mode, or in
serial controlled 'expanded' mode.
6. Transmit power can be set by serial command.
7. RSSI, and other status information, can be read back as a digital value. (on P3).
7a. The RSSI is a high impedence output. If a low impedence voltage source (an op-amp output) is
connected to the RSSI out pin then this voltage (0-2.5v) will override the RSSI value during
RSSI 'digital read' operations.
8. If analogue transmit modulation is needed, then connect a series 1uF cap + 500K trimmer (a
multiturn is advised) in the 'baseband TXD' circuit. Adjust trimmer for 90% of peak deviation
(+/- 2.7KHz) at mean input level.
9. The high current (250mA max.) transmitter supply (5v regulated) is fed to a separate connector
10. A version without a RX/TX switch is available. This unit has a 4 pin RF connector (RX, GND,
TX, GND) and is intended for use with external power amplifiers
Radiometrix Ltd
UHX1 Data Sheet (preliminary)
page 3
Serial interface commands
The UHX1 user interface is accessed through the four parallel pins (P0/serial through P3).
It has four operating modes:
1. Parallel.
Frequency of operation is selected as one of 16 (chans 0-15), by means of a 4 bit inverted value applied
to P0-P3. The P0 pin will also respond to a LOCKSERIALMODE datastream (inverted rs232, 9600
baud), which will cause the radio to enter serial mode. In parallel mode, the IDENT command string is
still decoded, but the unit remains in parallel mode.
2. Serial
Frequency of operation, radio set up, power output and various other parameters are controlled by
command strings sent to P0. Pin P3 functions as a 'readback' port while P1,2 are not used in this mode.
In this mode, decimal values are used (to simplify direct manual programming via a terminal)
Commands include:
Commands
Function
Notes
empty
command
buffer
:
? or /
<backspace>
<cr>
read back buffer contents
delete last character
process buffer
PARALLEL
DUMP
MODEM
NOMODEM
return to the basic, parallel mode (and turn
modem off)
read back contents of EEPROM (output on P3)
activate 1200 baud modem
de-activate 1200 baud modem
#
#
DEFCH ccc
DEFPOW pp
set default channel (non-volatile)
set default tx power (non-voltatile)
#
#
CHAN ccc
POWER pp
RSSI
jump to channel (volatile)
select tx power (volatile)
single read of RSSI (output on P3)
SHORT
enter short command mode
#
(The following commands are used to set up the radio operating characteristics, and should be viewed
with caution. Especially the CALPOWER command, which initiates a multiple write operation to the
power calibration table )
Commands
NDIV nnnnn
RDIV rrrrr
RLOAD rrrrr
OFFSET ooooo
LOAD aa nnnnn
START nnnnn
STEP i
LIMIT ccc
SETPOW eee
CALPOWER (etc)
TEST
IDENT
Radiometrix Ltd
Function
force N divider value (volatile)
force R divider value (volatile)
Set R divider value
Set RX offset
Set N values for first 16 channels
Set N value for ch 16
Set increment for table
Set highest permitted channel number
Set maximum power output (500mW)
(see factory procedures for more details)
Generate a 250Hz test modulation (only fuctions in
TX mode, cancelled by sending a <cr> byte)
Readback a single byte, depending on current
mode:
UHX1 Data Sheet (preliminary)
Notes
#
#
#
#
#
#
page 4
Commands
Function
Parallel:
Serial:
Short:
Modem:
Notes
P
S
I
M
(Channels 0-15 are individually programmed by the LOAD operation. Channels 16-127 are a
consecutive table, using the START value as a start point (=channel 16) and increasing the N value by
STEP with each increase in channel number)
ccc
= a channel number from 00 to 127
aa
= a two digit channel number from 00 to 15
nnnnn = synthesizer N register value, (up to 65535)
rrrrr = synthesizer R register value, (up to 16383)
pp
= power setting value (3-30: a value of 30 corresponds to a power output of +27dBm)
i
= table step (increments of N) (0-7)
ooooo = receive mode frequency offset
eee
= power calibration figure
N = channel frequency / (10MHz / R)
10MHz / R = 25KHz , so R = 400 (usually)
receive offset = 21.4MHz / (10MHz / R) , so = 856 (usually)
A pause of at least 50mS must be allowed after operations which result in eeprom programming
operations (all except NDIV, RDIV, GOTO, PSET and RSSI). This allows the programming cycle to
complete.
Instructions marked ' # ' output a three byte ' OK<cr> ' sequence after sucessfully completing their
eeprom programming cycles
When first powered up, the unit will operate on channel and output level specified by the last CHAN
and POWER instructions, irrespective of previous NDIV, RDIV, CHAN or PSET operations)
3. Short
A limited range of radio functions are controlled by sending a single byte to PO
0 - 127
select channel
(volatile)
128 - 159
select power
( = byte -128) (volatile)
200
single read of RSSI
(output on P3)
201
single byte read, as for IDENT command
222
reception of 16 consecutive 222 bytes returns radio to serial mode.
This mode of operation is intended to provide a simple, fast, serial command mode.
4. Modem
Commands are interpreted as in SERIAL mode (and 'short' mode may be selected.) In this mode the
unit operates as a simple 1200 baud packet modem, with TXD (in) on P2 and RXD (out) on P1.
The TXE pin does not control tx switching in this mode, but rather the presence of valid data in the tx
buffer initiates a transmit burst. No handshaking is provided, and the unit has a sufficient over-link
data rate to transparently 'stream' continuous data. Error correction, re-transmission of corrupt packets
and addressing are not provided.
This mode is compatible with other Radiometrix 'i 1200' mode equipment, including the narrow band
eval kit.
Notes:
1. Unlike in the RLC and TLC units, the LOCKSERIALMODE (and FAST) commands are nonvolatile. Once a serial mode is selected, the unit will power up in this mode until a PARALLEL
command is received.
Radiometrix Ltd
UHX1 Data Sheet (preliminary)
page 5
2. The command interpreter IS case sensitive. Use upper case.
3. Spaces are optional (they are not decoded), provided the command line does not exceed 16
characters.
4. When manually programming this unit we recommend setting your terminal to local echo. The
'backspace' key functions normally.
5. All serial communications use 9600baud 'inverted RS232' 8 bit data, no parity, 1 start bit, 1 or
2 stop bits
6. A simple 'driver' program will be made available to simplify programming of these units, if
desired.
7. RSSI read operations only function correctly if the unit is in RX mode (TXE pin is high or
floating)
Condensed specifications (All details are provisional)
Frequency
Frequency stability
Channel spacing
Number of channels
Supply
Receive
Transmit:
Operating temperature
Spurious radiations
Any 2MHz segment in 140 - 175MHz
(TX and RX frequencies need not be the same)
+/-5ppm (better than ±1.5kHz)
20kHz or 25kHz (12.5kHz by special order)
128 channels by serial RS232 interface or 16 by parallel select
3.1 -15V at 24mA
5.0V regulated
55mA (at 10mW output)
270mA (at 500mW output)
(plus 20mA at 3.6-15v from pin4: Vcc)
-20 to +70 C (Storage -30 to +70 C)
Compliant with ETSI EN 300 220-3 and EN 301 489-3
Interface
User
RF and TX supply
Reprogram
Recommended PCB hole size
Size
11 pin 0.1" pitch molex
6 pin 0.1" pitch molex
5 pin 0.1" pitch socket in top of case
1.2mm (min.)
67 x 30 x 12mm
Transmitter
Output power
TX on switching time
Modulation type
TX modulation bandwidth
Deviation
Adjacent channel TX power
TX spurii
Inputs
500mW (+27dBm); Adjustable via serial command 1 - 500mW in 1dB steps)
<50 ms
FM, FSK (F1D, F3D)
DC – 3kHz
±3kHz (±1.5kHz for 12.5kHz channel variant)
-37dBm
<-40dBm
Data (CMOS/TTL compatible)
Receiver
Sensitivity
image / spurious
blocking
adjacent channel
Outputs
-118dBm for 12dB SINAD
-65dB
-86dB
-65dB (tested per ETSI EN300 086)
RSSI, Audio, Data
Dynamic timing
RX data recovery settling time
Power on to stable (50:50
mark / space) RXD
Maximum time between data
transitions
Radiometrix Ltd
20ms
50ms (TXE low/active to stable RX data out)
250ms
UHX1 Data Sheet (preliminary)
page 6
Radiometrix Ltd
Hartcran House
231 Kenton Lane
Harrow, Middlesex
HA3 8RP
ENGLAND
Tel: +44 (0) 20 8909 9595
Fax: +44 (0) 20 8909 2233
[email protected]
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
Riverside House
2a Southwark Bridge Road
London SE1 9HA
Tel: +44 (0)845 456 3000 or 020 7981 3040
Fax: +44 (0)20 7783 4033
[email protected]
European Radiocommunications Office (ERO)
Peblingehus
Nansensgade 19
DK 1366 Copenhagen
Tel. +45 33896300
Fax +45 33896330
[email protected]
www.ero.dk
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