From 5e9b0a49da8a45600a056712044732ffa0120d7a Mon Sep 17 00:00:00 2001
From: c vw <dl1ycf@darc.de>
Date: Thu, 9 Jan 2020 19:39:01 +0100
Subject: [PATCH] making AutoAttenuation a little bit more precise
---
ps_menu.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/ps_menu.c b/ps_menu.c
index e1a4561..a303497 100644
--- a/ps_menu.c
+++ b/ps_menu.c
@@ -219,14 +219,21 @@ static int info_thread(gpointer arg) {
old5_2=info[5];
switch(state) {
case 0:
- if(newcal && (info[4]>181 || (info[4]<=128 && transmitter->attenuation>0))) {
- if (info[4] > 0) {
+ //
+ // A value of 175 means 1.2 dB too strong
+ // A value of 132 means 1.2 dB too weak
+ //
+ if(newcal && ((info[4]>175 && transmitter->attenuation < 31) || (info[4]<=132 && transmitter->attenuation>0))) {
+ if (info[4] > 256) {
+ // If signal is very strong, start with large attenuation and then step up
+ ddb = 100.0; // this makes the attenuation 31 dB in the next step
+ } else if (info[4] > 0) {
ddb= 20.0 * log10((double)info[4]/152.293);
} else {
// This happens when the "Drive" slider is moved to zero
- ddb= -100.0;
+ ddb= -100.0; // this makes the attenuation zero in the next step
}
- new_att=transmitter->attenuation + (int)ddb;
+ new_att=transmitter->attenuation + (int)lround(ddb);
// keep new value of attenuation in allowed range
if (new_att < 0) new_att= 0;
if (new_att > 31) new_att=31;
--
2.45.2