Your right Ed , there are no uk 8KHz tx permits .. Or
Probably as there aint one that long Ed , Never
tried OP10H !
But then , The test is data transfer / energy supplied ,
so would need on corrected energy transfer to allow for
the 50% duty cycle , carrier level , either +3 dB or x 2
time
Longest non mutilated Opera is 4 Hours, 2 hours
carrier , acid test would be a 4 hour test and Eb at 4 hours
at -3 db power level over a live path .
results of that test would be interesting, )
73-G,
Sent: Sunday, February 19, 2017 10:52 AM
Subject: Re: VLF: This weekend...
On 19/02/2017 07:48, DK7FC wrote:
...i forgot to
enable the scheduled actions in SpecLab, so the transmission didn't start to
the announced time.
Noticed that and set the new start time to 18:15
UTC, i.e. 15 min delayed...
*An urban decode in G
land. Wonderful.* (You couldn't do this with OPERA 'G').
Of course all
thanks and credits go to Paul, Marcus and Stefan not forgetting
Wolf.
ebnaut-rx V0.6
input file
C:\Comms\EbNaut\19_FEB_0005_8270.wav
sample rate 0.342935 per second
rx
frequency 8270.1
file start time 2017-02-18 17:27:09.370
polynomial
16K21A
crc size 16
number of chars 7
block size 58
symbol period
30.000
number of symbols 1248
list length 20000
start offset
2882.290
freq offset 0.000000
cores 2
skipped 2881.014117 seconds to
start
initial reference phase
-54.6
---------------------------------------------
found 7Symbols
Message
list rank 0
reference phase
0 0 0 0
carrier RMS
6.027e-005 noise RMS 5.405e-006
carrier S/N 20.95 dB in 26.7 uHz
carrier
Es/N0 -10.02 dB
carrier Eb/N0 4.94 dB
info bit period 938.35
seconds
symbol error rate 427/1248 = 34.215 %
Es/N0 from symbol errors
-10.8 dB
Eb/N0 from symbol errors 4.2 dB
Shannon capacity 16.4
bits/hour
Shannon efficiency 23.3 %
symbols file
C:\Comms\EbNaut\19_FEB_0005_8270-symbols.csv
elapsed 8 seconds
73
Eddie G3ZJO
