Hello
all,
I
could use assistance with WSJT-X decoding. I spent quite a
bit of time examining this
problem and capturing data in what I hope is an understandable
format. You might be tempted to respond quickly after reading
only the problem statement. Please take
a moment to glance over all the data; I've tried several
remidies from previous threads in this forum. Help is
appreciated.
Regards,
Curt
/ K7ZOO
PROBLEM
STATEMENT
After
I transmit, no decodes are displayed. The waterfall pauses
for a few seconds after transmitting.
Process
"explorer.exe" and one or more "svchost.exe" processes use the
CPU after transmitting (during the receive cycle), during 50%
duty cycle tests.
During
receive-only tests, these processes ("explorer.exe" and
"svchost.exe") do not appear to be active at all.
KEY ITEM:
I'm not sure why "explorer.exe" and "svchost.exe" appear
very active after transmitting. They don't appear to be
necessary to decoding, as they are not active when I'm
only receiving. Please see below where I've set the
priorities of some processing, in an attempt to allocate
more CPU to WSJT-X. My intuition is that something in
my system causes these processes to run, and they don't
need to run at all for WSJTX decoding.
COMPUTER
MAKE
/ MODEL HP
Elitebook Folio 9470m
PROCESSOR
Intel
Core i5-3427U 1.9 GHz 2.4 GHz
RAM
8 GB (7.87 usable)
TRANSCEIVER
MAKE
/ MODEL Icom
IC-7200
FREQUENCY
14.074
MODE
USB
AUDIO
FILTERING 3600 Hz
wide
DATA
ON
RF
POWER tried
both L and 30 watts; same behavior
MoD
U
D-MoD
U
USL
LVL 50
PRIORITIZATION
OF PROCESSES
I
downloaded, installed, and used “Process Hacker 2” to examine
and set
the priority of CPU processes as shown below:
wsjtx.exe
Priority Real Time
I/O
Priority High
Save
for wsjtx.exe checked
Jt9.exe
Priority Above
Normal
I/O
Priority Normal
Save
for jt9.exe checked
explorer.exe
Priority Below Normal
I/O
Priority Very Low
Save
for jt9.exe checked
OBSERVATIONS
a)
WSJT-X does decode normally when I’m only listening
b)
After transmitting only once WSJT-x skips (does not) decode
for 1 to
3 cycles. The DECODE button does not
turn blue when it skips (does not) decode.
Decoding resumes after 1 to 3 cycles.
c)
While transmitting at 50% duty cycle, WSJT-X does not decode.
c)
Signals are always present / visible on the waterfall.
Graphs
of CPU usage are shown below for (a) RX only, and (b) RX and
TX
at 50% duty cycle
