4115 OPERATOR CONVENIENCES[0] to select space or 0. Refer to page 17 for theavailable characters and control keys.PROGRAMMABLE VFOIf you want to limit the operating frequencies within acertain range, program the upper and lowerfrequency limits to the program VFO pamameters.For example, if you select 448 MHz for the lower limitand 449 MHz for the upper limit, the tunable rangewill be limited from 448.000 MHz to 449.995 MHz.1 Press [A/B] to select A-band.2 Press [VFO].2 Press [BAND] until you select the desiredamateur radio band to configure theprogrammable VFO frequency range.3 Press [MNU].4 Turn the Tuning control or press [ ]/ [ ] to selectMenu No. 4.• The current programmable frequency range forthe band appears.5 Press [sssss] or [MNU].6 Turn the Tuning control or press [ ]/ [ ] to selectthe lower limit frequency in MHz.7 Press [sssss] or [MNU] to store the lower limitfrequency.• The cursor moves to right and the upper limitfrequency blinks.8 Turn the Tuning control or press [ ]/ [ ] to selectthe upper limit frequency in MHz.7 Press [sssss] or [MNU] to store the upper limitfrequency.Note:uYou cannot program the 100 kHz or lower digit.uThe upper limit frequency varies depending on the selectedfrequency step size.SINGLE BAND OPERATIONIf you do not want to use A and B-band receiver at thesame time, you can turn A or B-band receiver OFF.1 Press [A/B] to select the band you want tooperate.2 Press [F], [A/B].• The frequency of the selected band appears inlarge font and the other band is turned OFF.3 To return to normal dual band operation, press [F],[A/B] again.TIME-OUT TIMERThe Time-out Timer limits the time of eachtransmission. The built-in time-out timer in thetransceiver limits each transmission time for amaximum of 10 minutes. It is necessary to protectthe transceiver from the thermal damage. You cannotturn this function OFF.TONE ALERTTone Alert provides an audible alarm when signalsare received on the frequency you are monitoring. Inaddition, it shows the number of hours and minuteselapsed after signals were received. If you use ToneAltert with CTCSS or DCS, it alarms only when areceived CTCSS tone or DCS code matches the toneor code yo selected.1 Select your desired frequeny or memory channel.2 Press [F], [ENT].• A bell icon appears when Tone Alert function isON.• When a signal is received, an alarm soundsfor 10seconds and the bell icon stars blinking.• Pressing the PTT switch while the bell icon isblinking switches Tone Alert function OFF.• When 99 hours and 59 minutes pass after a signalis received, counting stops.• Each time a new signal is received, the elapsedtime resets to 00:00.Note:uWhile Tone Alert is ON, there is no speaker output when a signalis received. To monitor the signal, press and hold [MONI].uWhen Tone Alert is ON, APO does not turn the power OFF.uWhen Tone Alert is ON, you can use only the following functions.[LAMP], [MONI], [SQL], [A/B], [F] then [LAMP], [F] then [ENT].TX INHIBITYou can inhibit the transmission to preventunauthorized individuals from transmitting, or toeliminate the accidental transmissions while carrying