OPERATOR'S MANUAL - Salcom

11-72-0000SYNTHESIZED 4 WATTNRZ DATA TRANSMITTEROPERATOR’SMANUALSea Air and Land Communications Ltd, PO Box 22-621, 120 St Asaph Street, Christchurch, New Zealand

11-72-0000 SYNTHESIZED NRZ DATA TRANSMITTER OPERATOR’S MANUAL Issue B 11-72-0000 SYNTHESIZED NRZ DATA TRANSMITTER OPERATOR’S MANUAL Issue BThe RED LED will indicate when the unit is transmitting. A flashing RED 9 PROGRAMMINGLED indicates the unit cannot transmit as either the synthesiser is out oflock or the channel busy input is active.9.1 Connecting the Programming adapter:To change the configuration options, the unit must be connected via aSALCOM 1146 adapter to the serial port of a IBM PC compatible6.0 OPERATIONThe 1172 will power on, and will remain in the standby mode until the PTTcomputer running the appropriate Product Support Disk (PSD) containingthe software (S1172WE1.EXE) to program the 11-72. This software caninput is activated.be obtained from our WEB site, shown below.7.0 INITIATING TRANSMISSIONS Connect the SALCOM 1146 adapter to the 15way D type socket S2. ToThe transmitter will be placed in transmit mode by the PTT (Press ToTalk) input being taken low. It will then turn the carrier on at the presetpower level, as defined in the configuration. The carrier frequency willfollow the Data1 input, a high input giving high frequency shift.Data2 input acts as a channel busy inhibit, when taken low it will stop thetransmitter coming on air.run the PSD, place the disk into floppy drive A. At a DOS prompt, typeA: S1172WE1 .An input can be initiated with a transition to LOW (connection to GND orconnection to +3.5v).8.0 TROUBLE SHOOTINGIf the 1172 does not perform as required, the following points may leadto solving the problem.FaultNo illumination of Green LEDPTT input activated but notransmissionUnit transmits but nothing receivedCheckBad power supply connectionBusy inhibit input active.Poor aerial. Wrong frequency, Power toolow. Unit too hot. Too much vibrationNo RS232 serial communication Comport connections, baud-rate (9600)no parity, eight data bits, one stop bitRed LED flashes rapidly. Nosynthesizer lock.Unit starts, but does not completetransmissionDoes not remain in transmit modeFrequency out of range, Channel busyactive.Poor supply volts, RF interference.“Max On Air Time” too shortCorrect communication between the 1172 and the PC comm port isindicated by the ID and product number appearing in the bottom righthand corner of the screen. If these fail to appear, check the baud ratesetting in File/Preferences.9.2 USING THE PROGRAMMING SOFTWARE:Once the program is running, the opening screen appears . Use thearrow keys or mouse to select various application layers and theconfiguration fields for each feature. At any time context sensitive help isavailable by pressing F1.The PSD software allows the user to configure the followingcharacteristics:C RF carrier frequencyC RF carrier frequency of alternate channelsC RF carrier powerC Maximum ON AIR time.C Low power operation in standbyC Simulcast delay.The RF Carrier frequency can be selected within a 2MHz band withoutadjustment of the VCO. Outside that band some adjustment may beneeded. Contact SALCOM for details of this work.Sea Air and Land Communications Ltd Page 3 Sea Air and Land Communications Ltd Page 4

11-72-0000 SYNTHESIZED NRZ DATA TRANSMITTER OPERATOR’S MANUAL Issue B10 SPECIFICATIONSPower SupplyRF FrequencyChannel SpacingOutput Power+11.5 V to 15.2 V nom 13.8 V138 - 170 MHz12.5 KHz or 25 KHz4 Watts +/- 1 dB 50 O (25 Watts optional)Power Consumption Standby : 45 mA Low power standby - 15 mATransmit: 800 mA approxModulationDeviationBaud rateModulationSpurious OutputsSerial input/outputDiscrete inputsDiscrete outputsCase DimensionsType ApprovalsCarrier FSK with NRZ data+/-4.5kHz or +/-2.5kHzmax 2400BaudNRZ FFSK-30dBm or lessRS-232 (DCE), 9600 baud no parity,8 data bits, 1 stop bitPulled up to +12v (47K), ground to activate.Threshold approx 3v+12v on P5 pin 8&15 (200mA max).PTT on S2 pins 7. (20mA sink with diode to 12 V)140 x 105 x 32mmTransmit duty cycle Up to 100%New Zealand - Australia AS4295Connections for S2Pin Function Pin Functionnumbernumber1 Ground 9 Not used2 Freq select 1 10 Freq select 23 Data Input 2 11 Not used4 Freq select 3 12 Not used5 PTT input 13 Data Input 16 Serial TD 14 Serial RD7 PTT output 15 +12V output8 +12V outputSEA AIR & LAND COMMUNICATIONS LTDPO Box 22-621, 120 St.Asaph Street, Christchurch, New ZealandPhone: (03) 379-2298 Fax: (03) 365-1580 Email: info@salcom.co.nzVisit us at www.salcom.co.nzSea Air and Land Communications Ltd Page 5