From a3a56bc830ebc61bb7287a6c2ed62a7e0f388a27 Mon Sep 17 00:00:00 2001
From: Ahmet Inan <xdsopl@gmail.com>
Date: Fri, 3 Sep 2021 20:50:33 +0200
Subject: [PATCH] freq offset needs to be divisible by 50.

use disorders/cfo if you need finer control
---
 encode.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/encode.cc b/encode.cc
index 1e2f930..e34f710 100644
--- a/encode.cc
+++ b/encode.cc
@@ -329,6 +329,11 @@ int main(int argc, char **argv)
 		return 1;
 	}
 
+	if (freq_off % 50) {
+		std::cerr << "Frequency offset must be divisible by 50." << std::endl;
+		return 1;
+	}
+
 	typedef float value;
 	typedef DSP::Complex<value> cmplx;