User manual ICOM IC-745

[. . . ] These lmts are desgned to provde reasonable protecton aganst harmful nterference n a resdental nstallaton. Ths equpment generates, uses and can radate rado frequency energy and, f not nstalled and used n accordance wth the nstructons, may cause harmful nterference to rado communcatons. However, there s no guarantee that nterference wll not occur n a partcular nstallaton. If ths equpment does cause harmful nterference to rado or televson recepton, whch can be determned by turnng the equpment off and on, the user s encouraged to try to correct the nterference by one or more of the followng measures: · Reorent or relocate the recevng antenna. [. . . ] Current passband wdth and shft frequency s dsplayed n the flter set screen. To set the [TWIN-PBT] controls to the center postons, push and hold [PBT-CLR] for 1 sec. The edge of the varable range s half of the passband wdth, and PBT s adjustable n 25 (SSB/CW/RTTY/PSK modes) or 100 Hz (AM mode) steps. · The [TWIN-PBT] controls should normally be set to the center postons (PBT settng s cleared) when there s no nterference. Ths comes from the DSP unt and does not ndcate an equpment malfuncton. · PBT operation example Both controls at center position PBT2 PBT1 Cutting the lower passband edge PBT2 PBT1 F-4 DEF FILTER Shows filter width, shifting value and condition · Filter set screen "SHARP" is selected. Cutting both lower and higher passband edges PBT2 PBT1 Passband Passband IF center frequency Interference Desired signal Interference Desired signal Interference 75 RECEIVE AND TRANSMIT 4 IF filter selection The transcever has 3 passband wdth IF flters for each mode. For SSB, CW and PSK modes, the passband wdth can be set wthn 50 to 3600 Hz n 50 or 100 Hz steps. For RTTY mode, the passband wdth can be set wthn 50 to 2700 Hz n 50 or 100 Hz steps. For AM mode, the passband wdth can be set wthn 200 Hz to 10 kHz n 200 Hz steps. For FM mode, the passband wdth s fxed and 3 passband wdths are avalable. The PBT shft frequences are automatcally memorzed n each flter. 1 2 3 4 DEF F-4 5 6 7 8 Main dial D IF filter selection q Select the desred mode. r Push [MAIN/SUB M. SCOPE] to enables the sub band access when changng the frequency, etc. n sub band. · Push [MAIN/SUB M. SCOPE] agan for the man band access. [BAL] control MAIN /SUB M. SCOPE Main dial Appears t Adjust the [BAL] control to set a sutable sgnal strength balance between the man and sub readout frequences. · S-meter shows the combned sgnal strength. y To transmt on the sub readout frequency, push [CHANGE] or [SPLIT]. NOTE: · A beat note may be heard dependng on the frequency combnaton. · The TX functon can be used for the transmt readout (man readout when the splt functon OFF; sub readout when the splt functon ON). 79 RECEIVE AND TRANSMIT 4 · Scanning during dualwatch Scannng operates only for the man readout. To operate the scan durng dualwatch, scan on the man readout and use the sub readout for your QSO usng both dualwatch and splt frequency operaton. 101 for programmng. · If you plan to operate a F scan, programmng the scan edges may not be necessary. DUAL WATCH SPLIT w Push [SPLIT] to turn the splt frequency functon ON. ·" " appears. F-1 PROG F-2 F F-5 SCAN EXIT/SET 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 80 e Select VFO mode for the man readout. t Push and hold [DUALWATCH] for 1 sec. ·" " appears. · Equalzed receve frequency and operatng mode appear on the sub band readout and the dualwatch functon s turned ON. y Push [SCAN] (F-5) to select the scan screen. · Push [EXIT/SET] several tmes to close a mult-functon screen, f necessary. u Push [PROG] (F-1) or [F] (F-2) to start the programmed scan or F scan, respectvely. · Scan actvates on the man readout between the programmed scan edges or wthn the F span. · Transmttng on the sub readout stops the scan. i To cancel the scan, push [EXIT/SET]. 4 RECEIVE AND TRANSMIT Noise blanker <MODE> SSB/CW/RTTY/PSK/AM The nose blanker elmnates pulse-type nose such as the nose from car gntons. Push [NB] to turn the nose blanker functon ON and OFF. · The ndcator on ths swtch lghts green when the nose blanker s ON. When usng the nose blanker, receved sgnals may be dstorted f they are excessvely strong or for other types of nose than mpulse. Turn the nose blanker OFF, or set the nose blanker threshold level (see below) to a shallow poston n ths case. NB F-1 F-2 F-4 DEF EXIT/SET Main dial D NB set mode To deal wth varous type of nose, attenuaton level and nose blankng duraton can be set n NB set mode. [. . . ] y Push and hold [FIRM UP] (F-3) for 1 sec. [USB] (A) F-1 / DIR/FILE F-2 / EXIT/SET 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 u Read the dsplayed precauton carefully. · Push [Y] (F-1) or [Z] (F-2) to scroll the ndcaton. · Push [CANCEL] (F-6) to cancel the frmware updatng. i After you read and understand all of the precautons, push [OK] (F-5). · [OK] (F-5) appears only followng the precautons. · Push [CANCEL] (F-6) to cancel the frmware updatng. o Push [Y] (F-2) or [Z] (F-3) to select the frmware fle, then push [FIRM UP] (F-4). !0 Read the dsplayed precautons carefully. !1 If you agree, push and hold [OK] (F-5) for 1 sec. to start the frmware update. · Push [CANCEL] (F-6) to cancel the frmware updatng. 16 17 18 19 20 Contnues to the next page. !2 Whle loadng the frmware from the USB-Memory, the dalog as at left s dsplayed. 21 164 14 UPDATING THE FIRMWARE Frmware update (Contnued) !3 After the frmware loadng s completed, the transcever starts the update automatcally and the dalog at rght s dsplayed. [. . . ]