Tactical Electronics SX450G UHF TRANSCEIVER User Manual

Tactical Electronics Corporation UHF TRANSCEIVER Users Manual

USERS MANUAL

1892 1344 - SX450G Transceiver Operator Guide v1.2 / Dec 2006 1SX450 G TRANSCEIVEROPERATING INSTRUCTIONSThese operating instructions are intended to provide the user with sufficient information toinstall and operate the unit correctly.The SX450 G is a high-performance synthesized UHF transceiver foruse in radio telemetry applications. The transceiver provides a maximum power output of500mW and is designed to meet European standards EN 300 220, EN300 086 andEN300 389. The unit also complies with USA FCC and Industry Canada standards.Two versions are available, the SX450 GA and the SX450 GC. They differ only inconnections, and are functionally identical.Tactical Electronics Corporation13 December 2006
21892 1344 - SX450G Transceiver Operator Guide v1.2 / Dec 2006Figure 1 SX450 G fixing detailDIMENSIONS AND FIXINGThe SX450 G is intended to fit easily and with minimum space requirements into theuser's own equipment housing.Figure 2 - SX450 GA connectors Figure 3 - SX450 GC connector
1892 1344 - SX450G Transceiver Operator Guide v1.2 / Dec 2006 3The four corner tabs of the enclosure can be folded out to provide alternative mounting ofthe unit, with fixing centres of 93.00 x 47.5mm using four M2 screws.Figure 4 - Alternative mounting dimensions
41892 1344 - SX450G Transceiver Operator Guide v1.2 / Dec 2006CONNECTIONSThe radio antenna connects via an MMCX 50O socket. All other connections to the SX450 GA transceiver are made via a 12-way connector PL1and an 8-way connector PL2. These are single-in-line plugs for use with the free-issuedconnectors with flying leads. All other connections to the SX450 GC transceiver are made via a 21-way SIL PCBconnector, PL1.SX450GA SX450GC NAME FUNCTION REMARKSPL1-1 PL1-1 0V 0 volts common groundPL1-2 PL1-2 STBY standby input LOW (<+0.6V) = transceiver enabledHIGH (>+2.0V) = standby mode(internal pull-up, 40K to +4V max)PL1-3 PL1-3 HI/LO TX RF power selectinput >+2.0V = high power, <+0.8V = low power(internal pull-down, 10K to 0V)PL1-4 PL1-4 +Vin positive supply input +5.5 to +9.0 V input (-ve earth)PL1-5 PL1-5 TXE transmit enable input HIGH (>+2.0V) = receiver enabledLOW (<+0.8V) = transmitter enabled(internal pull-up, 100K to +5V)PL1-6 PL1-6 TXD/MS TXD - serial datainputMS - mode select,ie channelselection byserial orparallel datainput Serial data input = single 8-bit RS232 formatcontrol word, ie logic 1 = -V, logic 0 = +V (Maximum voltagelevel is +12V; inverted TTL acceptable).Mode selected depends on the logic state:HIGH > 1ms (>+2.0V) = parallel data inputLOW (<+0.8V) = serial data input(internal pull-up, 50K to +3V)PL1-7 PL1-7 CS0/DT CS0 - channelselect input(LSB)DT - synthesizerserial datainput*Channel select inputs use inverted 5V logiclevels;HIGH (>+2.0V) = logic 0, LOW (<+0.8V) = logic 1CS0 to CS5 are used for channel selection by 6-bit parallel data (Internal pull-ups 100K to +5V)(* DT/CK/EN inputs are used for direct control ofthe synthesizer, this is a separate version of theSX450.)PL1-8 PL1-8 CS1/CK CS1 - channelselect inputCK - synthesizerprogrammeclock *PL1-9 PL1-9 CS2/EN CS2 - channelselect inputEN - synthesizerenable strobeinput*PL1-10 PL1-10 CS3 channel select inputPL1-11 PL1-11 CS4 channel select input
1892 1344 - SX450G Transceiver Operator Guide v1.2 / Dec 2006 5PL1-12 PL1-12 CS5 channel select input(MSB)PL1-13 -not connected -PL2-1 PL1-14 RF DET TX RF present flagoutput HIGH (+5V, internal 10K pull-up) = TX RFpresent LOW (0V) = no TX RFNOTE: only available when high TX RF power isselectedPL2-2 PL1-15 AF O/P receiver audio output 600mV p.p. nom. into 10K; AC-coupled; Rout =2K3.PL2-3 PL1-16 SQO squelch flag output NPN open collector via 470O; ON = no signal,OFF = signal present.(NOTE: OFF when transceiver in standby mode)PL2-4 PL1-17 OOL out-of-lock output NPN open collector via 470O; ON = out of lock(NOTE: OFF when transceiver in standby mode)PL2-5 PL1-18 DMOD digital modulationinput ** +3V to +12V square wave, DC-coupled** DMOD and AMOD may not be usedsimultaneously. Leave unused inputunconnected.PL2-6 PL1-19 AMOD analog modulationinput ** 750mV p-p., AC-coupled (pre-settable 200mV to3V p-p.)** DMOD and AMOD may not be usedsimultaneously. Leave unused inputunconnected.PL2-7 PL1-20 RSSI 'S' meter output 0V to +3V output, rising with received signal level(typ. 50dB range)PL2-8 PL1-21 SQOR squelch override input HIGH (>+2.0V) enables AF O/P regardless ofsquelch state (RX only)LOW (+0.8V or o/c) = normal operation(internal pull-down, 70K to 0V)
61892 1344 - SX450G Transceiver Operator Guide v1.2 / Dec 2006OVERVIEW OF FREQUENCIES AND PROGRAMMINGEach radio is built to order to cover a band (the switching bandwidth) of 15 or 20MHzwithin the range 400 - 490MHz. Available bands are 400-415, 415-430, 430-450, 450-470, and 470-490MHz. Each radio is also manufactured to work with a particular channelwidth of 12.5kHz, 20kHz or 25kHz. These are fixed parameters, and cannot be changedby the user.Within the switching bandwidth, the unit can operate on any frequency (provided it is awhole multiple of the comparison frequency - see page 9), and up to 256 frequencies canbe stored as numbered channels 0 to 255. There can also be an offset between transmit and receive frequencies, which is the samefor all channels. You can set this offset, but both transmit and receive frequencies mustremain within the switching bandwidth, fixed at manufacture.During operation, a channel can be selected at any time either using logic lines or a serialdata input. Logic lines can only select channels 0-63, serial commands can select anychannel.Before the unit leaves the factory, each of 256 channels is allocated to a frequency, butyou can reprogram them if you wish. To do this, you need to read the existing data fromthe unit, edit it using a special program supplied by Wood & Douglas (SXWIN.EXE),which runs on a PC under Windows, then write the data back to the unit.You can program the unit in one of two ways:v256-channel mode: All 256 channels 0-255 can be programmed, but as ablock by entering a starting frequency and a step size, so that they containuniformly spaced frequencies. v80-channel mode: Each of channels 0-79 can be individually programmedwith any frequency, but the remaining channels 80-255 are not available foruse. One channel is then nominated as the operational channel.
1892 1344 - SX450G Transceiver Operator Guide v1.2 / Dec 2006 7CONNECTING THE UNIT TO A PC FOR PROGRAMMINGIn order to program the unit, the unit and a PC (IBM-compatible personal computer) mustcommunicate via an asynchronous RS232 serial link. The unit also requires a powersupply.The adaptor of Figure 3 provides these connections.Figure 5 - Adaptor to connect a PC to an SX450 GThe power supply should source between 4.5V and 16V DC at approximately 60mA.
81892 1344 - SX450G Transceiver Operator Guide v1.2 / Dec 2006Figure 6 - Parallel channel selectionCHANNEL SELECTION DURING OPERATIONThere are three ways to select a channel during operation:vIn hardware, using six logic lines to select channels 0-64vUsing the SXWIN.EXE software and a serial connection from a PC to theunitvBy sending a short serial data message to the unit from your own equipment.Parallel Channel SelectionvPL1 pin 6 must be logic high (>2.0V) or high-impedance (e.g. no connection)to select parallel channel selection. This can be done at any time.vOnly channels 0 - 63 are available in this modeThe six channel select inputs are an inverse binary representation of the channel number,that is, switch ON = input LOW = logic 1. If no connections are made, the unit thereforedefaults to channel 0.Changes are implemented immediately.The logic levels are : LOW < 0.8V HIGH > 2V or floating
1892 1344 - SX450G Transceiver Operator Guide v1.2 / Dec 2006 9Serial Channel SelectionvPL1 pin 6 must be logic low (<0.8V) to select serial channel selection. Thiscan be done at any time.vChannels 0 - 255 are available in this modeWhen PL1 pin 6 is first taken low (or it is low at power-up), the unit operates on thechannel most recently selected in serial mode. This setting is remembered during unitpower off.The channel can be changed by sending a serial channel number as an RS232 characteron PL1 pin 6. The SXWIN.EXE software has the ability to do this, or you can use yourown equipment. The protocol is:9600 baud, RS232 levels, 1 start bit - 8 bit data - no parity - 1 stop bitSingle-byte, channel number in binary, LSB first (decimal 0 to 255)As soon as the character is recognised as a valid RS232 character, the channel ischanged. No confirmation is required.
10 1892 1344 - SX450G Transceiver Operator Guide v1.2 / Dec 2006RANGE INFORMATIONThe following table gives an indication of the typical ranges to be expected between atransmitter and receiver that have simple end-fed dipole antennas.The following assumptions have been made in the calculations:line-of-sight between antennas0dB gain for the transmitter and receiver antennas0dB loss for connectors and cables between the antenna and the radio connector20dB fade and environmental margin-100dBm received signal strength, allowing for digital and analog signalsRange versus TX powerFrequency (MHz) Power (mW) Power (dBm) Range (km)458.5 1mW 00.5458.5 10mW 10 1.7458.5 100mW 20 5.3458.5 500mW 27 11.9
1892 1344 - SX450G Transceiver Operator Guide v1.2 / Dec 2006 11TECHNICAL SPECIFICATIONGeneralFrequency range 400-490MHz available. Specify 400-415, 415-430, 430-450, 450-470 or 470-490MHz when ordering.Switching bandwidth 15 or 20MHz depending on band ordered.Frequency stability +2.6ppm over operating temperatureChannel switching delay 100ms maximum (over 20MHz switching bandwidth)Channel selection 64 channels maximum using 6-bit parallel logic line input.256 channel maximum sequential, 80 individuallyprogrammed using serial data word.Channel spacing 12.5kHz/20kHz/25kHz availableModulation type F1D/F2D/F3DSpurious emissions (conducted & radiated) In accordance with ENI/CEPTSupply voltage 4.5 to16V DC negative earthSupply current at 7.2V 60mA typical (receive), 400mA typical for 500mW output(transmit)Interface connections 21 pin SIL PCB connection (SX450 GC)1 x 8 + 1 x 12 way 1.27mm pitch Molex plug with matingconnectors + 200mm leads (SX450 GA)RF connection PC mounted socket Operating temperature -30%C to +55%CStorage temperature -30%C to +70%CSize overall 85 x 55 x 12.7mmWeight 81gType approvals - complies with: EN300 220, EN300 389 (EMC), EN300 086, FCC Part 90and Part 15
12 1892 1344 - SX450G Transceiver Operator Guide v1.2 / Dec 2006TransmitterRF output power into 50O 500mW (HI) (+0/-1.5dB) 5mW (LO)TX/RX switching time <25msModulation inputanaloguedigital 750mV p-p, AC-coupled +3 to +12V square wave DC-coupledFrequency response 9Hz to 3kHz at -3dB (analog input)(optional extended response to 6kHz for 9600 baudGMSK)Frequency deviation25kHz channel spacing20kHz channel spacing12.5kHz channel spacing+3.0kHz nominal (+4.0kHz max)+2.3kHz nominal (+3.0kHz max)+1.5kHz nominal (+2.0kHz max)Adjacent channel power <200nW (-37dBm)Facilities RF detect output (+5V = TX on) (HI power only)ReceiverSensitivity <-115dBm for 12dB SINAD (Measured with flataudio response)<-107dBm for 20dB SINAD (Measured with flataudio response)Image rejection >70dBIntermodulation rejection >65dBBlocking >84dBSpurious rejection >70dBIntermediate frequencies 45MHz and 455kHzAdjacent channel rejection12.5kHz channel spacing20/25kHz channel spacing >60dB>70dBRecovered audio level 600mV p-p (+20%) into 10KSquelch type Noise operatedSquelch output NPN open collector via 470OON = no signal, OFF = signal presentFacilities RSSI output (0 to +3V nominal from 2K2 source)Squelch override inputSTBY input Standby current 150uA typ for HI/LO input = 0V
Tactical Electronics Corporation 4000 Dow Road, Melbourne, Florida 32934Tel: 321 253 0845 Fax: 321 253 6466email: info@tacel.comwebsite: www.tacel.com1892 1344 - SX450 G Transceiver Operator Guide v1.2 / Dec 2006 13

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