User manual ICOM IC-T81A-E

[. . . ] INSTRUCTION MANUAL iT81A/E MULTIBAND FM TRANSCEIVER This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. IMPORTANT READ ALL INSTRUCTIONS pletely before using the transceiver. carefully and com- CAUTIONS RWARNING!NEVER hold the transceiver so that the antenna is very close to, or touching exposed parts of the body, especially the face or eyes, while transmitting. [. . . ] · "FM" appears when narrow FM operation is on. Push [VFO] to exit set mode and return to regular operation. Push [MULTI()] one or more times until "AM" appears in the dis12  *NOTE: FM narrow operation can be set for individual memory channels or in VFO mode; narrow FM affects BASIC OPERATION 4 I RIT/VXO function (1200 MHz band) In the 1200 MHz band, differences between actual and displayed frequencies can often be large. The RIT (receive incremental tuning) function allows you to compensate the displayed frequency for differences in the actual receive frequency; the VXO (variable crystal oscillator) function allows you to compensate the displayed frequency for differences in the actual receive and transmit frequencies. D Adjusting the frequency with RIT/VXO Make sure that RIT or VXO is activated in set mode and that the 1200 MHz band is selected. Select a frequency in the 1200 MHz band (or a memory channel with a 1200 MHz band frequency; or the 1200 MHz band call channel). Push [RIT] to display the frequency offset in kHz. Push [MULTI()] one or more times (or rotate [DIAL]) to adjust Offset: ­2 kHz (approx. ) the frequency offset. · The frequency offset can be set ±5 kHz in 1 kHz steps. Push [VFO] to return to regular display indication. Offset: +5 kHz (approx. ) D Activating RIT/VXO USING SET MODE Select a frequency in the 1200 MHz band (or a memory channel with a 1200 MHz band frequency; or the 1200 MHz band call channel). Push [MULTI()] one or more times until "rV" appears. Push [MULTI()] one or more times to select "RIT" (RIT activated, "VXO" (VXO activated) or "OFF" (neither activated)--[DIAL] can also be used. Push [VFO] to exit set mode and return to the previously selected mode. · When RIT or VXO is activated, ":" appears above the decimal point in the frequency indication (in the 1200 MHz band).  NOTE: When using the RIT/VXO function the indicated offset frequencies are only approximate values. 13 4 BASIC OPERATION I Receive mode USING SET MODE The IC-T81A/E allows you to receive frequencies in the 50 MHz band in AM mode (as well as to transmit in FM narrow mode in the 144 MHz band for Italy, France and Europe versions only--see p. Push [MULTI()] one or more times to select the 50 MHz band. Push [MULTI] for 1 sec. to enter set mode. AM Push [MULTI()] one or more times until "MO" appears. Push [MULTI()] (or rotate [DIAL]) one or more times to select "AM. " Push [VFO] to exit set mode and return to VFO mode. · "AM" appears when frequencies in the 50 MHz band are selected.  NOTE: When AM operation is selected, transmit is not possible. When [PTT] is pushed, "OFF" appears. AM operation can also be selected for individual memory channels programmed with 50 MHz frequencies. In this way you can program individual frequencies for AM receive while allowing regular transmit/receive for 50 MHz frequencies in VFO mode. 14 REPEATER OPERATION I General When using a repeater, the transmit frequency is shifted from the receive frequency by the offset frequency. It is convenient to program repeater info into memory channels (pgs. 18­20). 5 D Tone information Some repeaters require a tone to be accessed. In this case, precede step at left with the required tone. DTMF TONES While pushing [PTT], push the desired digit key(s) to transmit DTMF tones. · The transceiver has 9 DTMF memory channels. 21 for details. Set the operating band and receive frequency (repeater output frequency). Push [MULTI] to enter duplex set mode. · "D" appears; if "T" appears instead of "D" push [MULTI()] to select "D. " Push [MULTI()] (or rotate [DIAL]) one or more times to select DUP ( plus duplex) or ­DUP (minus duplex). · When the auto repeater function is in use (USA version only) steps , , and are not necessary (p. [. . . ] 14 31 12 Version USA Europe UK Italy Asia SPECIFICATIONS : 144 MHz 430 MHz 1. 2 GHz (Unit: MHz) WFM*4 76­107. 995 MHz) 88­107. 995 88­107. 995 76­107. 995 88­107. 995 76­107. 995 GENERAL · Frequency coverage 50 MHz 50­54 TRANSMITTER · Modulation system · Output power (at 13. 5 V DC) Rx: 118­173. 995*1 Rx: 400­469. 995*2 1240­1300 Tx: 144­148 Tx: 430­450*2 : Variable reactance modulation : High 5 W typ. (except 1200 MHz) 1 W (1200 MHz) Low 0. 5 W typ. for 1200 : Less than ­60 dB Less than ­50 dB (Eur, Italy) (Less than ­40 dB for 1200 MHz) : ±5 kHz : 3-conductor 2. 5(d) mm (1/8)/ 2 k 50­52 144­146 430­440 1240­1300 (Rx only) 50­52 Rx: 118­173. 995*1 Rx: 400­469. 995*3 1240­1300 TX: 430­440 (Rx only) Tx: 144­148 50­54 Rx: 118­173. 995*1 Tx: 144­148 144­148 144­146 430­440 430­440 430­440 1240­1300 1240­1300 1260­1265 · Spurious emissions · Max. microphone connector RECEIVER · Receive system Australia 50­54 Taiwan N/A *1Guaranteed 144­148 MHz only; *2Guaranteed 440­450 MHz only; *3Guaranteed 430­440 MHz only; *4Not guaranteed; Some versions may be able to transmit. 32 : FM(F3E), WFM(Rx), AM(Rx) : 124 (100 regular, 20 program scan edges and 4 call) · Tuning steps : 5*, 10, 12. 5, 15*, 20, 25, 30, 50 and 100 kHz *Not available for 1200 MHz band. [. . . ]