From b05ab7d272914436d97d91f179632c564ac3d86e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Stefan=20Br=C3=BCns?= <stefan.bruens@rwth-aachen.de>
Date: Tue, 3 May 2016 00:14:37 +0200
Subject: [PATCH] hameg-hmo: Add comment clarifying coupling options

50 Ohm termination is only available on the higher end scopes.
---
 src/hardware/hameg-hmo/protocol.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/hardware/hameg-hmo/protocol.c b/src/hardware/hameg-hmo/protocol.c
index 3c095e9c..1f5e5de7 100644
--- a/src/hardware/hameg-hmo/protocol.c
+++ b/src/hardware/hameg-hmo/protocol.c
@@ -68,10 +68,10 @@ static const uint32_t hmo_analog_devopts[] = {
 };
 
 static const char *hmo_coupling_options[] = {
-	"AC",
-	"ACL",
-	"DC",
-	"DCL",
+	"AC",  // AC with 50 Ohm termination (152x, 202x, 30xx, 1202)
+	"ACL", // AC with 1 MOhm termination
+	"DC",  // DC with 50 Ohm termination
+	"DCL", // DC with 1 MOhm termination
 	"GND",
 	NULL,
 };