Looking at the db for Sodus ny fire frequencies . . .

[KB2GOM]

. . . what's the difference between a PL tone and a DPL tone, and what difference does that make when entering the frequencies into my Uniden 125?

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
151.3775	WQLQ220	RM	141.3 PL	WCoFD Disp	Ch 1 Fire Dispatch	FMN	Fire Dispatch
155.940	KZV227	RM	156.7 PL	WCoEMS Disp	Ch 2 EMS Dispatch	FMN	EMS Dispatch
156.1725	WQLQ220	BM	071 DPL	WCoFD3 FG	Ch 3 Fireground	FMN	Fire-Tac
151.0025	WQLQ220	BM	115 DPL	WCoFD4 FG	Ch 4 Fireground	FMN	Fire-Tac
151.0925	WQLQ220	M	172 DPL	WCoFD5	Ch 5	FMN	Fire-Talk
153.8525	WQLQ220	M	343 DPL	WCoFD6	Ch 6	FMN	Fire-Talk

 

[chief21]

. . . what's the difference between a PL tone and a DPL tone, and what difference does that make when entering the frequencies into my Uniden 125?

Both tone formats are intended to eliminate nuisance interference from other users on the same channel. Note that it is NOT necessary to add the tones to receive the signal... carrier squelch (CSQ - ie no tone) will still allow reception.

Here is a description of tone types from the repeater-builder.com website...

CTCSS (Continuous Tone-Coded Squelch System) uses sub-audible (below 300 Hz, not necessarily inaudible) tones to activate coded receivers. PL (Private Line) is Motorola's trademarked name for this system. General Electric calls theirs CG (Channel Guard).

DCS (Digital-Coded Squelch) uses a 23-bit digital pattern to activate coded receivers. DPL (Digital Private Line) is Motorola's trademarked name for this system. General Electric calls theirs DCG (Digital Channel Guard).

 

[KB2GOM]

Both tone formats are intended to eliminate nuisance interference from other users on the same channel. Note that it is NOT necessary to add the tones to receive the signal... carrier squelch (CSQ - ie no tone) will still allow reception.

Here is a description of tone types from the repeater-builder.com website...

CTCSS (Continuous Tone-Coded Squelch System) uses sub-audible (below 300 Hz, not necessarily inaudible) tones to activate coded receivers. PL (Private Line) is Motorola's trademarked name for this system. General Electric calls theirs CG (Channel Guard).

DCS (Digital-Coded Squelch) uses a 23-bit digital pattern to activate coded receivers. DPL (Digital Private Line) is Motorola's trademarked name for this system. General Electric calls theirs DCG (Digital Channel Guard).

Thanks! Very helpful.