From 9b586bdf7e560478e35301e772571156bf8f303b Mon Sep 17 00:00:00 2001
From: debian <git@localhost>
Date: Sat, 28 Dec 2019 19:56:12 -0700
Subject: [PATCH] not exactly working yet...

---
 sstv/spec.py | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/sstv/spec.py b/sstv/spec.py
index cfa5823..241c3dc 100644
--- a/sstv/spec.py
+++ b/sstv/spec.py
@@ -182,6 +182,16 @@ class R72(R36):
 
     HAS_ALT_SCAN = False
 
+# http://www.classicsstv.com/pdmodes.php
+# Mode Pixel Line   Sync Porch Frame(secs) Resolution VIS VIS+P
+# PD120 190 508480  20000 2080 126.103040  640 x 496   95  95
+# The line times are for a complete "double" line, comprising sync + porch + Y0 + R-Y + B-Y + Y1. Please note that there are no pulses or porches between the four components.
+# Transmission time 126.1 seconds
+# Color scan times 121.600ms
+
+# from qsstv
+# //  name      shortName  mode      imagetime Pix Dis Txl  VIS     sync    fp      bp     blank   synctx   fptx    bptx    blanktx
+# "PD120"     ,"PD120",  PD120,   126.11150,640,496,248,0x5F  ,0.02000,0.00000,0.00208,0.00000,0.02000,0.00000,0.00230,0.00000,0.,1900,400 
 class PD120(object):
     NAME = "PD-120"
 
@@ -189,7 +199,7 @@ class PD120(object):
     LINE_WIDTH = 640
     LINE_COUNT = 496
     SCAN_TIME = 0.121600
-    HALF_SCAN_TIME = 0.069000
+    HALF_SCAN_TIME = 0.060800
     SYNC_PULSE = 0.020000
     SYNC_PORCH = 0.002080
     SEP_PULSE = 0.000000
@@ -206,7 +216,8 @@ class PD120(object):
 
     LINE_TIME = SYNC_PULSE + 3 * CHAN_TIME
     PIXEL_TIME = SCAN_TIME / LINE_WIDTH
-    WINDOW_FACTOR = 3.933
+    HALF_PIXEL_TIME = HALF_SCAN_TIME / LINE_WIDTH
+    WINDOW_FACTOR = 10
 
     HAS_START_SYNC = True
     HAS_HALF_SCAN = False