From 12da6cc9971987387ecd3e47924a04ccbe61d24e Mon Sep 17 00:00:00 2001
From: Jeff Epler <jepler@gmail.com>
Date: Mon, 25 Oct 2021 08:21:33 -0500
Subject: [PATCH] Compute signal delay from receiver delay, debounce delay, and
 light delay

---
 wwvbdecode.cc | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/wwvbdecode.cc b/wwvbdecode.cc
index 2e7e350..4f18398 100644
--- a/wwvbdecode.cc
+++ b/wwvbdecode.cc
@@ -221,8 +221,9 @@ bool operator==(const wwvb_t &a, const wwvb_t &b) {
 const uint8_t NSAMPLES = 120;
 const int8_t DEBOUNCE_TC = 10;
 const int16_t COUNTER_SLOP = 100;
-// 10 for DEBOUNCE_TC, 30 for receiver rise/fall time, 5 for light propagation
-const int16_t SIGNAL_DELAY = 40;
+const int16_t RECEIVER_DELAY = 40;
+const int16_t LIGHT_DELAY = 5;
+const int16_t SIGNAL_DELAY = RECEIVER_DELAY + 2*DEBOUNCE_TC + LIGHT_DELAY;
 uint8_t wwvb_buf[(NSAMPLES+3)/4];
 int8_t wwvb_pos;