From 16932280288688f462ead13dffb050b81fdc4ec8 Mon Sep 17 00:00:00 2001 From: Mikael Nousiainen Date: Wed, 10 Nov 2021 18:58:07 +0200 Subject: [PATCH] Add notes about Horus 4FSK continuous transmit mode --- README.md | 1 + src/config.h | 2 ++ 2 files changed, 3 insertions(+) diff --git a/README.md b/README.md index 7d04b99..42c3c4d 100644 --- a/README.md +++ b/README.md @@ -52,6 +52,7 @@ The main features the RS41ng firmware are: * Support for multiple transmission modes: * Standard 1200-baud APRS * [Horus 4FSK v1 and v2 modes](https://github.com/projecthorus/horusdemodlib/wiki) that has improved performance compared to APRS or RTTY + * There is an option to use continuous transmit mode (for either V1 or V2 mode), which helps with receiver frequency synchronization and improves reception. * Morse code (CW) * JT65/JT9/JT4/FT8/WSPR/FSQ digital modes on HF/VHF amateur radio bands using an external Si5351 clock generator connected to the external I²C bus * Support for transmitting multiple modes consecutively with custom, rotating comment messages (see `config.c`) diff --git a/src/config.h b/src/config.h index 6e8165b..0973912 100644 --- a/src/config.h +++ b/src/config.h @@ -51,6 +51,8 @@ #define RADIO_SI4032_TX_HORUS_V2 true // Continuous transmit mode can be enabled for *either* Horus V1 or V2, but not both. This disables all other transmission modes. +// The continuous mode transmits Horus 4FSK preamble between transmissions +// to allow Horus receivers to keep frequency synchronization at all times, which improves reception. #define RADIO_SI4032_TX_HORUS_V1_CONTINUOUS false #define RADIO_SI4032_TX_HORUS_V2_CONTINUOUS false