USX2-433-5

EW N Issue B, 03 April 2008 Radiometrix Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233 USX2 PRELIMINARY DATA SHEET NBFM MultiNBFM Multi-channel UHF Transceiver USX2 is small multi-channel half duplex UHF transceiver available for operation on 315MHz, 433MHz and 458MHz bands with the user programmable RF power output of up to 100mW. USX2 offers up to 128 frequency channels in 25kHz channel spacing. USX2 also features dual VCO which allows transmitter section to be operated on one frequency while receiver on another. Figure 1: USX2-433-5 Features ! ! ! ! ! ! ! ! ! ! ! Conforms to ETSI EN 300 220-3 and EN 301 489-3 High performance double superhet, 128 channel PLL synthesizer 100mW RF power output: adjustable via serial command Data rates up to 5 kbps for standard module Usable range over 500m 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: 315MHz (USA), 433MHz (European) and 458MHz (UK) bands 128 channels controlled via RS232 interface 16 channels selected by parallel interface Transmit power: 100mW (+20dBm) nominal. Adjustable 0.1 – 100mW Supply range: 3.6 - 15V Current consumption: 100mA (at 100mW output) transmit, 25mA receive Data bit rate: 5kbps max. (standard module) Receiver sensitivity: -118dBm (for 12 dB SINAD) Size: 50 x 30 x 12mm USX2 Data Sheet (preliminary) page 1 Radiometrix Ltd Radiometrix Ltd USX2 Data Sheet (preliminary) page 2 Figure 2: USX2 block diagram Figure 3: Provisional USX2 footprint Pin Description Pins 1A 2A 3A 1 2 3 4 5 6 7 8 9 10 11 Normal mode RF Gnd RF in/out RF Gnd TXD TXE GND Vcc P3 P2 P1 P0 RSSI RXD AF out RF ground To the antenna RF ground DC coupled input for TTL/ CMOS logic Transmit enable. Low = RX mode. High = TX. (10kΩ pull down) (0V) DC supply input (3.6 –15V) Parallel channel select MSB Parallel channel select P1 - Parallel channel select P0 - 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 NC NC Serial mode Modem mode Serial read back TBA TBA PGM in BUSY MOD TXD MOD RXD PGM in NC NC NOTES: 1. 2. 3. 4. 5. 6. 7. 8. No inversion occurs between TXD and RXD. However AF out is inverted relative to TXD. Parallel channel selects (P0-P3) and TXE are active LOW and have 47kΩ internal pullups to 3V Open collector output RXD has a 47 kΩ pullup to 3V. The software incorporates a 1200 baud modem, compatible with that implemented in other Radiometrix narrowband units ( i1200 tones and format ). Modem operation is selected by serial command. 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 Transmit power can be set by serial command RSSI can be read back as a digital value. (on P3) If analogue transmit modulation is needed, then connect a series 1µF cap + 500kΩ trimmer (a multiturn is advised) in the TXD circuit. Adjust trimmer for 90% of peak deviation (+/- 2.7KHz) at mean input level. Radiometrix Ltd USX2 Data Sheet (preliminary) page 3 USX2 serial interface details (version 4): PRELIMINARY The USX2 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 : : ? or / PARALLEL DUMP MODEM NOMODEM DEFCH ccc DEFPOW pp CHAN ccc POWER pp RSSI SHORT empty command buffer read back buffer contents delete last character process buffer 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 # set default channel set default tx power jump to channel select tx power single read of RSSI (non-volatile) (non-voltatile) (volatile) (volatile) (output on P3) # # # 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 ) NDIV RDIV nnnnn rrrrr force N divider value force R divider value (volatile) (volatile) # # # # # # RLOAD rrrrr OFFSET ooooo LOAD aa nnnnn START nnnnn STEP i LIMIT ccc SETPOW eee CALPOWER (etc) TEST 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 (100mW) (see factory procedures for more details) Generate a 250Hz test modulation (only fuctions in TX mode, cancelled by sending a byte) Readback a single byte, depending on current mode: Parallel: P Serial S Short 1 Modem M IDENT (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) Radiometrix Ltd USX2 Data Sheet (preliminary) page 4 ccc aa nnnnn rrrrr pp i ooooo eee = a channel number from 00 to 127 = a two digit channel number from 00 to 15 = synthesizer N register value, (up to 65535) = synthesizer R register value, (up to 16383) = power setting value (0 - 30) = table step (increments of N) (0-7) = receive mode frequency offset = power calibration figure N = channel frequency / (13MHz / R) 13MHz / R = 25KHz , so R = 520 (usually) receive offset = 21.4MHz / (13MHz / 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 ' 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 - 127 128 - 159 200 201 222 select channel (volatile) select power ( = byte -128) (volatile) single read of RSSI (output on P3) single byte read, as for IDENT command 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 N_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: Unlike in the RLC and TLC units, the LOCKSERIALMODE (and FAST) commands are non-volatile. Once a serial mode is selected, the unit will power up in this mode until a PARALLEL command is received. The command interpreter IS case sensitive. Use upper case. Spaces are optional (they are not decoded), provided the command line does not exceed 16 characters. When manually programming this unit we recommend setting your terminal to local echo. The 'backspace' key functions normally. All serial communications use 9600baud 'inverted RS232' 8 bit data, no parity, 1 start bit, 1 or 2 stop bits A simple 'driver' program will be made available to simplify programming of these units, if desired. RSSI read operations only function correctly if the unit is in RX mode (n_TXE pin is high or floating) Radiometrix Ltd USX2 Data Sheet (preliminary) page 5 Condensed specifications (All details are provisional) Frequency Frequency stability Channel spacing Number of channels 315 - 315.375MHz (US band) 433.875 - 434.650MHz (433 MHz EU band) 458.525 - 459.1MHz (458MHz UK band) ±1.5kHz 25kHz 128 channels selected via serial RS232 interface First 16 are individually programmable Next 112 are a sequential table 16 channels selected via parallel interface 3.6 -15V 45mA transmit (at 10mW output) 100mA transmit (at 100mW output) 25mA receive (or modem ‘idle’) -20 to +70 C (Storage -30 to +70 C) 50x 30 x 12 mm Compliant with ETSI EN 300 220-3 and EN 301 489-3 11 pin 0.1" pitch molex 3 pin 0.1" pitch molex 5 pin 0.1" pitch socket in top of case 1.2mm (min.) Supply voltage Current Operating temperature Size Spurious radiations Interface User RF Reprogram Recommended PCB hole size Transmitter Output power TX on switching time Modulation type TX modulation bandwidth Deviation Adjacent channel TX power TX spurii Inputs Receiver Sensitivity image / spurious blocking adjacent channel Outputs 100mW (+20dBm); Adjustable via serial command 0.1 - 100mW