TR1M-151-5

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, 25 February 2008 TR1M Narrow MultiNarrow Band FM Multi-channel VHF Transceiver The TR1M narrow band multi channel transceiver module is intended as a general purpose VHF data communication unit. It is available on any frequency between 135 and 175MHz (in 3MHz bands) and delivers up to 100mW RF output. This transceiver offers a low power, reliable data link in an industry standard footprint. For added flexibility it shares a common pinout with the UHF TR2M module. Features Figure 1: TR1M-151-5 VHF transceiver Conforms to EN 300 220-3 and EN 301 489-3 Any 3MHz band module from 135MHz to 175MHz 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 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 Size: 59 x 38 x 12mm Custom variants from 135MHz to 175MHz on any 3MHz band (Available on the UK 173.2MHz 173.325MHz 10mW band) 128 serial select or 8 parallel select channels Transmit power: +20dBm (100mW) nominal Supply range: 4.5V - 16V Current consumption: 110mA transmit (@100mW), 27mA receive Data bit rate: 5kbps max. (standard module) Receiver sensitivity: -118dBm (for 12 dB SINAD) Radiometrix Ltd TR1M Data Sheet page 1 Radiometrix Ltd TR1M Data Sheet page 2 Figure 2: TR1M block diagram A: A: B: B: B: C: C: C: C: C: C: C: C: C: C: C: C: C: 1 Vcc 2 Gnd 1 RF Gnd 2 RF in 3 RF Gnd 1 TXE (MOD TX_ON) 2 TXD (MOD NC) 3 AF in (MOD NC) 4 RSSI 5 SQF (MOD NC) 6 AF out 7 RXD (MOD NC) 8 +4.4V out 9 0V 10 PGM 11 P1 (MOD TXD) 12 P2 (MOD RXD) 13 P3 (MOD NC) 59mm 3.1mm 2.7mm A 8.9 mm Squelch adj. 38.5mm 33mm 1 Input gain. B 1 53.3mm C Unit height 12mm Figure 3: TR1M Footprint (Top) view Pin Description - TR1M Pins A1 A2 B1 B2 B3 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 Name Vcc GND RF GND RF RF GND TXE (MOD TX_ON) TXD (MOD NC) AF in (MOD NC) RSSI SQF (MOD NC) AF out RXD (MOD NC) +4.4V out 0V PGM P1 (MOD TXD) P2 (MOD RXD) P3 (MOD NC) Function 4.5V-16V Ground RF ground To the antenna RF ground Transmitter Enable. Low = ON, Open = RX mode. Internal 10kΩ pull-up to 4V DC coupled digital data input for 3-12V CMOS logic. Leave open if unused 50mV - 2.5v p-p AC coupled input. Variable gain. Factory set to 1Vpk-pk ±10% to keep distortion 2.5kHz. 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 suitable for Biphase codes Regulated DC supply. 75mA max. drain. Present if unit is powered Ground Serial programming/configuration input at RS232 level Parallel frequency select inputs. Inverted logic, internal 10kΩ pullups to 4V Notes: 1. TR1M receiver section inverts the sense of the baseband stream, so a logical inversion is present between input of TX and output of RX. 2. Carrier detect on TR1M mutes the AF Out and RXD outputs. It can be factory disabled. 3. All the open collector outputs must be connected to Vcc/+4.4V out via a pull-up resistor. 4. The software incorporates a 1200baud dumb modem, compatible with that implemented in SMX1, UHX1, NBEK, TX1M, RX1M radios (I1200 tones and format) 5. With 1200baud modem mode enabled, parallel selection of channel is unavailable as the P1-P3 lines are used for modem input/output operations. 6. PGM and MOD TXD (pin 10 and 11) tolerate true ±RS232 levels. No buffering is required. 7. For UK version the following channel assignment is supplied: Channel 0 1 2 3 4-7 8 - 127 Frequency (MHz) 173.250 173.275 173.300 173.325 173.225 (only used for alarm applications) 173.325 Radiometrix Ltd TR1M Data Sheet page 3 TR1M serial configuration commands 2400 baud RS232. 8 bit data, no parity, 1 start bit, 1 or 2 stop bits, No flow control SINGLE GOCHAN LOADMX LOAD aa LOADTB RVALUE SETPAR SETSER SETMOD nnnnn xx xx nnnnn nnnnn rrrr 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' Set receive frequency offset (for 25KHz this is 856) Process entry Clear all buffers OFFSET ooo / 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 N= f RF 173.200 MHz = = 6928 25kHz  10 Mhz    R R= f TCXO f channelspacing = 10 MHz , So R=400 25kHz 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 173MHz band, channel 4- 7 (173.225MHz) is allocated specifically for fixed alarm 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. Radiometrix Ltd TR1M Data Sheet page 4 Pin description of TR1M 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. Pins 1 2 3 4 5 6 7 8 9 10 11 12 13 Name MOD TX_ON MOD NC MOD NC RSSI MOD NC AF out NC +4.4V out 0V PGM MOD TXD MOD RXD CDE Function Open = normal modem operation. Low = constant TX (for test). 10k pullup to 4V Leave open Leave open DC level between 0.5V and 2.5V. 60dB dynamic range Leave open Modem tones or noise present Leave open Regulated DC supply. 75mA max. drain. Present if unit is powered Ground Serial programming/configuration input at RS232 level RS232 data input (true). 10k pullup to 4V Inverted RS232 data out (to inverting buffer like MAX232) Pull low to enable carrier detect on receive operation (not recommended) TR1Ms 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. TXE (MOD TX_ON) (C1) TXD (MOD NC) (C2) AF in (MOD NC) (C3) RSSI (C4) SQF (MOD NC) (C5) TR1M AF out (C6) RXD (MOD NC) (C7) +4.4V out (C8) GND (C9) PGM (C10) P1 (MOD TXD) (C11) P2 (MOD RXD) (C12) P3 (MOD NC) (13) SW1 VDD Serial COM Port 6 7 8 9 1 2 3 4 5 SGD RXD TXD RS232 driver Figure 4: TR1M 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 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 TR1M Data Sheet page 5 Condensed specifications Frequency Frequency stability Channel spacing Number of channels Any 3MHz band from 135 - 175MHz +/- 1.5kHz 25kHz (12.5kHz by special order) 128 channels controlled via RS232 interface (8 parallel selected) 4.5-16V Transmit: 110mA nominal @ 100mW (55mA nominal @ 10mW) Receive: 27mA -10 to +60 οC (Storage -30 to +70 οC) 59 x 38 x 12 mm Compliant with ETSI EN 300 220-3 and EN 301 489-3 13pin 0.1" pitch molex 2pin 0.1" pitch molex 3pin 0.1" pitch molex 1.2mm (min.) Supply voltage Current Operating temperature Size Spurious radiations Interface user Power RF Recommended PCB hole size Intended approval ETSI Radio standard EN 300 220-3 and EMC standard EN 301 489-3 +20dBm (100mW) ±1dB (factory adjustable 1-100mW) 50 ms FM, FSK (F1D, F3D) DC – 3kHz -37dBm analogue, data (CMOS/TTL compatible) Transmitter Output power TX on switching time Modulation type TX modulation bandwidth Adjacent channel TX power Inputs Receiver Sensitivity image / spurious blocking adjacent channel Outputs Power on to valid audio (no noise mute) Power on to valid audio (with noise mute) Power on to stable data out (50:50 mark / space) -118dBm for 12dB SINAD -70dB -85dB