From 52f6ee5713fed5d07bc7a498948179cd8776db80 Mon Sep 17 00:00:00 2001
From: Marat Fayzullin <mfayzullin@openmobileww.com>
Date: Thu, 15 Dec 2022 13:03:41 -0500
Subject: [PATCH] Added special case for CW, where receiver tunes 700Hz below
 the carrier.

---
 htdocs/lib/Demodulator.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/htdocs/lib/Demodulator.js b/htdocs/lib/Demodulator.js
index 79282b6..0bdb919 100644
--- a/htdocs/lib/Demodulator.js
+++ b/htdocs/lib/Demodulator.js
@@ -249,7 +249,12 @@ Demodulator.prototype.set_offset_frequency = function(to_what) {
     if (this.offset_frequency === to_what) {
         return;
     }
-    this.offset_frequency = to_what;
+    if (this.get_modulation() === 'cw') {
+        // For CW, move offset 700Hz below the actual carrier
+        this.offset_frequency = to_what - 700;
+    } else {
+        this.offset_frequency = to_what;
+    }
     this.set();
     this.emit("frequencychange", to_what);
     mkenvelopes(get_visible_freq_range());