diff --git a/common.py b/common.py
index 6eea63c..362004c 100644
--- a/common.py
+++ b/common.py
@@ -7,7 +7,7 @@ log = logging.getLogger(__name__)
 Fs = 32e3
 Ts = 1.0 / Fs
 
-frequencies = (np.arange(10) + 1) * 1e3
+frequencies = (np.arange(11) + 1) * 1e3
 carrier_index = 0
 Fc = frequencies[carrier_index]
 Tc = 1.0 / Fc
diff --git a/test.sh b/test.sh
index 40fbf7a..660fb85 100755
--- a/test.sh
+++ b/test.sh
@@ -3,7 +3,7 @@ set -u
 set -x
 set -e 
 
-dd if=/dev/urandom of=data.send bs=1024 count=64
+dd if=/dev/urandom of=data.send bs=1024 count=128
 python send.py
 python recv.py
 python errors.py data.* #python show.py tx.int16 rx.int16
\ No newline at end of file