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SAME TX generates and transmits Specific Area Message Encoding (SAME) digital headers — the protocol used by the US Emergency Alert System (EAS) and NOAA Weather Radio. SAME-capable receivers use these headers to selectively activate for alerts targeting their programmed county.

Controls

Field	Description	Range / Options	Default
Org	Originator code	WXR, EAS, CIV, PEP	WXR
Evt	Event type (index 0–25)	See table below	RWT (index 0)
FIPS State	2-digit US state FIPS code	00–99	39 (Ohio)
FIPS County	3-digit county FIPS code	000–999	007 (Ashtabula)
Dur H	Alert duration — hours	00–99	00
Dur M	Alert duration — minutes	00–59	30

A live preview of the message string updates on screen as fields are changed.

Originator Codes

Code	Meaning
WXR	National Weather Service
EAS	EAS Participant (broadcaster or cable system)
CIV	Civil Authorities
PEP	Primary Entry Point System (presidential-level)

Event Codes

#	Code	Event
0	RWT	Required Weekly Test
1	RMT	Required Monthly Test
2	NPT	National Periodic Test
3	NST	National Silent Test
4	NMT	National Periodic Test
5	EAN	Emergency Action Notification
6	EAT	Emergency Action Termination
7	NIC	National Information Center
8	ADR	Administrative Message
9	AVA	Avalanche Watch
10	AVW	Avalanche Warning
11	BZW	Blizzard Warning
12	CFW	Coastal Flood Watch
13	CFS	Coastal Flood Statement
14	DSW	Dust Storm Warning
15	EQW	Earthquake Warning
16	EVI	Evacuation Immediate
17	FFW	Flash Flood Warning
18	FFS	Flash Flood Statement
19	FFH	Flash Flood Watch
20	FRW	Fire Warning
21	HLS	Hurricane Statement
22	HUW	Hurricane Warning
23	HUH	Hurricane Watch
24	SVR	Severe Thunderstorm Warning
25	TOR	Tornado Warning

Message Format

The transmitted header has the form:

ZCZC-ORG-EVT-SS0CCC+HHMM-0010000-SAMETX--

where SS is the state FIPS, 0CCC is the county FIPS (the leading 0 is literal, part of the SAME county encoding), HHMM is the duration, and -0010000-SAMETX- are fixed placeholder fields for issue time and station ID. The full message is preceded by 16 preamble bytes and transmitted 3 times automatically, as required by the SAME standard.

RF Parameters

Parameter	Value
Default frequency	162.550 MHz (NOAA Weather Radio)
Bandwidth	1.75 MHz
Sample rate	1.536 MSps
Modulation	AFSK / FM
Mark tone	2083 Hz
Space tone	1563 Hz
Baud rate	~520.83 bps
FM deviation	5 kHz
Repeats	3×

Settings Persistence

Settings are saved to tx_same.ini.