From 96e0a368b91f75d18410c8a23b7d8e59fa56027f Mon Sep 17 00:00:00 2001 From: Andy CA6JAU Date: Sun, 26 Aug 2018 12:49:22 -0300 Subject: [PATCH] Correct typo in README --- README.md | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/README.md b/README.md index 0478968..b21e37b 100644 --- a/README.md +++ b/README.md @@ -40,7 +40,7 @@ This software is licenced under the GPL v2 and is intended for amateur and educa MMDVM_HS boards do not need deviation calibration like MMDVM boards, but could be necessary some frequency offset calibration (ADF7021 does not have AFC for 4FSK modes). -The following options in MMDVM.ini ([Modem] setion) have not any effect for MMDVM_HS boards: +The following options in MMDVM.ini ([Modem] section) have not any effect for MMDVM_HS boards: TXInvert RXInvert @@ -49,7 +49,7 @@ The following options in MMDVM.ini ([Modem] setion) have not any effect for MMDV RXDCOffset TXDCOffset -The following options in MMDVM.ini ([Modem] setion) are very important for MMDVM_HS boards: +The following options in MMDVM.ini ([Modem] section) are very important for MMDVM_HS boards: RXOffset: RX frequency offset (HS RX BER improvement) TXOffset: TX frequency offset (radio RX improvement) @@ -65,7 +65,7 @@ The following options in MMDVM.ini ([Modem] setion) are very important for MMDVM # Important notes -The ADF7021 (or RF7021SE module) must operate with a 14.7456 MHz TCXO and with at least 2 ppm of frequency stability. For 800-900 MHz frequency band you will need even a better frequency stability TCXO. You could use also 12.2880 MHz TCXO. Any other TCXO frequency is not supported. Please note that a bad quality TXCO not only affects the frequency offset, also affects clock data rate, which is not possible to fix and will cause BER issues. +The ADF7021 (or RF7021SE module) must operate with a 14.7456 MHz TCXO and with at least 2.5 ppm of frequency stability. For 800-900 MHz frequency band you will need even a better frequency stability TCXO. You could use also 12.2880 MHz TCXO. Any other TCXO frequency is not supported. Please note that a bad quality TCXO not only affects the frequency offset, also affects clock data rate, which is not possible to fix and will cause BER issues. Please set TXLevel=50 in MMDVM.ini to configure default deviation levels for all modes. You could modify this value and other TXLevel paramenters to change deviation levels. Use [MMDVMCal](https://github.com/g4klx/MMDVMCal) to check DMR deviation level and TX frequency offset with calibrated test equipment.