This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

TEDI/LCR TX generates and transmits LCR (Langage de Commande Routier — Road Command Language) frames, a French protocol used to control dynamic road equipment: variable message signs (PMV), tunnel systems, traffic cameras, emergency phones, weather stations, and related infrastructure. It uses AFSK modulation (Bell 202-compatible) over FM.

Controls

EC — Éclairage (lighting) mode. Options: Auto (A), Jour/Day (J), Nuit/Night (N), S? (S).

RGSB — The 4-character destination address code (e.g. AI10). Press the RGSB button to enter a custom address via the keyboard. In scan mode, this is overridden by the selected address list.

AM1–AM5 — Up to 5 address message slots. Each slot has a checkbox (to include it in the frame) and a Set button to enter the 7-character payload text. Only checked slots are included in the transmitted frame.

Modem Setup — Opens the modem configuration screen where you set the baudrate and repeat count. These settings are shared with other AFSK apps and persist in memory.

Scan (checkbox) — When enabled, automatically cycles through all RGSB addresses in the selected list, transmitting the configured frame to each address in sequence.

List — Selects the preconfigured RGSB address list used in scan mode. Contains a list of known addresses for the Lille road network (36 entries).

Clear — Clears all AM slot content and unchecks all checkboxes.

START / STOP — Starts or stops transmission. A progress bar and status line show repeat and scan progress (repeat/total scan_index/total).

Message Format

The transmitted LCR frame has the following structure:

<7 sync bytes> RGSB AM=1 [AM=2 ...] EC=  

Text in each AM slot is padded to 7 characters. The checksum is an XOR of all characters from the RGSB field to the EOM byte, masked to 7 bits. The complete frame is transmitted the number of times set in Modem Setup.

Preconfigured RGSB Lists

Lille (36 addresses): AI10–AI70, AJ10–AJ70, AK10, EAA0–EAD0, EbA0–EbS0

Reims (20 addresses): AI10–AI70, AJ10–AJ70, AK10–AK70 (selected), AP10

RF Parameters

Parameter	Value
Modulation	AFSK / FM (Bell 202-compatible)
Mark frequency	1200 Hz
Space frequency	2200 Hz
Baud rate	Configurable via Modem Setup (default: 1200 bps)
Bandwidth	1.75 MHz
Sample rate	1.536 MSps
Frequency step	10 kHz

Settings Persistence

Settings are saved to tx_lcr.ini. Baudrate and repeat count are stored in shared persistent memory via Modem Setup.