UHX1-144-5

EW N Radiometrix Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233 Issue A, 20 November 2007 UHX1-xxx-5 PRELIMINARY DATA SHEET NBFM 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 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 Figure 1: UHX1-144-5 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 Radiometrix Ltd UHX1 Data Sheet (preliminary) page 2 Figure 2: UHX1 block diagram Figure 3: Provisional UHX1 footprint Pin Description Pins RF 1A 2A 3A 4A 5A 6A User 1 2 3 4 5 6 7 8 9 Normal mode Serial mode Modem mode RF Gnd RF in/out RF Gnd GND GND Vcc (TX) TXD TXE GND Vcc P3 P2 P1 P0 RSSI RF ground To the antenna RF ground 0V 0V 5V regulated supply for TX 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 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 / PARALLEL DUMP MODEM NOMODEM DEFCH ccc DEFPOW pp CHAN ccc POWER pp RSSI SHORT 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 (non-volatile) set default tx power (non-voltatile) jump to channel (volatile) select tx power (volatile) single read of RSSI (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 ) 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 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 ' 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: 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 Operating temperature Spurious radiations Interface User RF and TX supply Reprogram Recommended PCB hole size 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 Dynamic timing RX data recovery settling time Power on to stable (50:50 mark / space) RXD Maximum time between data transitions 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 500mW (+27dBm); Adjustable via serial command 1 - 500mW in 1dB steps)