From 24aaac8e3f25a6d52cd11645e1f4b4533fa3d2fc Mon Sep 17 00:00:00 2001
From: michael-west <michael.west@ettus.com>
Date: Tue, 1 Jul 2014 17:11:30 -0700
Subject: Fix for BUG #527: N200: 50 Msps results in two tones - Adjusted check
to enable first half-band filter only if the rate is decimated enough between
the CIC and other half-band filter
---
host/lib/usrp/cores/rx_dsp_core_200.cpp | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/host/lib/usrp/cores/rx_dsp_core_200.cpp b/host/lib/usrp/cores/rx_dsp_core_200.cpp
index 2fdc220b5..2e5ca8e7a 100644
--- a/host/lib/usrp/cores/rx_dsp_core_200.cpp
+++ b/host/lib/usrp/cores/rx_dsp_core_200.cpp
@@ -176,7 +176,8 @@ public:
//determine which half-band filters are activated
int hb0 = 0, hb1 = 0;
- if (decim % 2 == 0){
+ // hb0 can only be enabled if the rate will be decimated by at least 2 between the CIC and hb1
+ if (decim >= 4 && decim % 2 == 0){
hb0 = 1;
decim /= 2;
}
--
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