134 Part F: Configuring Channels © Tait Electronics Limited December 2007The Duration box specifies the length of the tone burst. You can specify thisin milliseconds or in cycles. If the burst has too many cycles, it comes back intophase with the original subtone and the radio may detect it again, re-openingthe receiver gate. Specifying the duration in cycles for different CTCSSfrequencies can help prevent this.The Phase angle box specifies the amount that the burst is out of phase withthe original CTCSS subtone. If you select +120 or -120 instead of 180, morecycles are required before the burst comes back in phase with the originalsubtone.Soft-off timeThe base station can also send only carrier (carrier without modulation of anykind) at the very end of each transmission.In the Edit Signalling Profile dialog box, Tx Timers tab, the Soft-off timecheck box enables the feature and the Duration box specifies the length of timethat only carrier is transmitted.AdvancedIn the Add or Edit Signalling Profile dialog box, the Advanced tab lets youconfigure reminder tones and tail pip tones.Reminder toneReminder tones can be used if the base station is being used as a communityrepeater. They are tones that can be added to transmissions for a particular talkgroup. To enable them, edit the Subaudible Signalling tab.One pip every Specifies the interval between reminder tones.Pip duration Specifies the length of time that the reminder tone sounds for.Tone level Specifies the amplitude of the reminder tone relative to the nominal audio level.Tone frequency Specifies the frequency of the reminder tone.
