Icom ID-52A Advanced Manual english - Page 238

15 OTHER FUNCTIONS Tone squelch operation The tone squelch opens only when you receive a signal that includes a matching subaudible tone in the FM or FM narrow (FM-N) mode. You can silently wait for calls from other stations using the same tone. Also, the reversed tone squelch function mutes the squelch when a signal including a matching subaudible tone. Step 1. Setting the tone squelch frequency [MENU] > SET > DUP/TONE... > TSQL Freq 1. Push [VFO/MHz] to enter the VFO mode. 2. Push [MODE] to select the FM or FM-N mode. 3. Rotate [DIAL] to set an operating frequency. 4. Push [MENU]. 5. Select "DUP/TONE..." in the "SET" menu. 6. Select "TSQL Freq." Step 2. Using the tone squelch 1. Push [QUICK]. 2. Select "TONE." 3. Select the Tone Squelch type. 7. Rotate [DIAL] to set a Tone Squelch frequency, then push [ENT]. 4. Operate normally. •• You will only hear the audio of stations that are using the same Tone Squelch frequency. All other signals will be muted. LLSet to between 67.0 and 254.1 Hz. LLTo exit the MENU screen, push [MENU]. About the Tone squelch types indication •• TSQL: Enables the Tone Squelch function. •• TSQL-R: E nables the Reverse Tone Squelch function. •• TONE(T)/DTCS(R) ("T-DTCS" is displayed, "T" blinks.): When you transmit, the selected subaudible tone is superimposed on your normal signal. When you receive, the DTCS squelch opens only for a signal that includes a matching DTCS code and polarity. (Audio is heard) •• DTCS(T)/TSQL(R) ("D-TSQL" is displayed, "D" blinks.): When you transmit, the selected DTCS code is superimposed on your normal signal. When you receive, the tone squelch opens only for a signal that includes a matching tone frequency. (Audio is heard) •• TONE(T)/TSQL(R) ("T-TSQL" is displayed, "T" blinks.): When you transmit, the selected subaudible tone is superimposed on your normal signal. When you receive, the tone squelch opens only for a signal that includes a matching tone frequency. (Audio is heard) 15-8