From 6b1e3d38e2e08ddb23f5255155dcbc3fe0dd9303 Mon Sep 17 00:00:00 2001
From: Manolis Surligas <surligas@gmail.com>
Date: Mon, 4 Jun 2018 11:46:52 +0300
Subject: [PATCH] Tune CW parameters

* Set the loop bandwith of the PLL to a lower value, to get rid off the
DC leakage and improve SNR
* Set the AGC update rate to a higher value
* Decrease the CW decoding threshold
---
 apps/flowgraphs/cw_decoder.grc        | 6 +++---
 apps/flowgraphs/satnogs_cw_decoder.py | 8 ++++----
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/apps/flowgraphs/cw_decoder.grc b/apps/flowgraphs/cw_decoder.grc
index bbbaf24..7f72635 100644
--- a/apps/flowgraphs/cw_decoder.grc
+++ b/apps/flowgraphs/cw_decoder.grc
@@ -309,7 +309,7 @@ TX sampling rate</value>
     </param>
     <param>
       <key>rate</key>
-      <value>1e-4</value>
+      <value>1e-3</value>
     </param>
     <param>
       <key>reference</key>
@@ -352,7 +352,7 @@ TX sampling rate</value>
     </param>
     <param>
       <key>w</key>
-      <value>2*math.pi/100</value>
+      <value>2*math.pi/400.0</value>
     </param>
     <param>
       <key>max_freq</key>
@@ -3118,7 +3118,7 @@ we shift the LO a little further</value>
     <key>satnogs_cw_to_symbol</key>
     <param>
       <key>threshold</key>
-      <value>0.8</value>
+      <value>0.4</value>
     </param>
     <param>
       <key>alias</key>
diff --git a/apps/flowgraphs/satnogs_cw_decoder.py b/apps/flowgraphs/satnogs_cw_decoder.py
index 9961814..2fba76c 100755
--- a/apps/flowgraphs/satnogs_cw_decoder.py
+++ b/apps/flowgraphs/satnogs_cw_decoder.py
@@ -5,7 +5,7 @@
 # Title: CW Decoder
 # Author: Manolis Surligas (surligas@gmail.com)
 # Description: A CW (Morse) Decoder
-# Generated: Mon May 21 18:50:09 2018
+# Generated: Mon Jun  4 11:44:20 2018
 ##################################################
 
 from gnuradio import analog
@@ -70,7 +70,7 @@ class satnogs_cw_decoder(gr.top_block):
         self.satnogs_morse_decoder_0 = satnogs.morse_decoder(ord('#'), 3)
         self.satnogs_iq_sink_0 = satnogs.iq_sink(16768, iq_file_path, False, enable_iq_dump)
         self.satnogs_frame_file_sink_0_0 = satnogs.frame_file_sink(decoded_data_file_path, 0)
-        self.satnogs_cw_to_symbol_0 = satnogs.cw_to_symbol(audio_samp_rate/4, 0.8, 0.75, wpm)
+        self.satnogs_cw_to_symbol_0 = satnogs.cw_to_symbol(audio_samp_rate/4, 0.4, 0.75, wpm)
         self.satnogs_coarse_doppler_correction_cc_0 = satnogs.coarse_doppler_correction_cc(rx_freq, samp_rate_rx / xlating_decimation)
         self.pfb_arb_resampler_xxx_0 = pfb.arb_resampler_ccf(
         	  (audio_samp_rate) / (samp_rate_rx / xlating_decimation),
@@ -100,8 +100,8 @@ class satnogs_cw_decoder(gr.top_block):
         self.blocks_complex_to_real_0 = blocks.complex_to_real(1)
         self.blocks_complex_to_mag_squared_0 = blocks.complex_to_mag_squared(1)
         self.analog_sig_source_x_0 = analog.sig_source_c(audio_samp_rate, analog.GR_COS_WAVE, bfo_freq, 1, 0)
-        self.analog_pll_carriertracking_cc_0 = analog.pll_carriertracking_cc(2*math.pi/100, 2*math.pi*2e3/audio_samp_rate, -2*math.pi*2e3/audio_samp_rate)
-        self.analog_agc_xx_0 = analog.agc_ff(1e-4, 1.0, 1.0)
+        self.analog_pll_carriertracking_cc_0 = analog.pll_carriertracking_cc(2*math.pi/400.0, 2*math.pi*2e3/audio_samp_rate, -2*math.pi*2e3/audio_samp_rate)
+        self.analog_agc_xx_0 = analog.agc_ff(1e-3, 1.0, 1.0)
         self.analog_agc_xx_0.set_max_gain(65536)
         self.analog_agc2_xx_0_0 = analog.agc2_cc(0.01, 0.001, 0.015, 0.0)
         self.analog_agc2_xx_0_0.set_max_gain(65536)