Field strength

Field strength values extracted from SDR recordings

An update of software HDSDR allows to extract fieldstrength values into a file (depending on settings several per second). These values in dBm are more precise than S/N-values from skimmers in the RBN, because they eliminate the unknown variable for N=noise. Additionally they are available for every transmission, be it CQing OR calling in S&P - as well as giving field strength values for SSB signals, too.

As a first impression here are values for TopTen stations extracted from our SDR recordings for 80m - the band having the comparatively smallest influence of skip and beam direction. Listed are values from around 1900, 2100 and 2300 UTC. Nearly all are plus/minus 15 minutes, only a few plus/minus 20 minutes. Values for CW and SSB can not be compared against each other. Just in case: The bigger the figure behind the minus sign the weaker the signal ;-)
A zero means that there were no QSOs in this mode during the time period.

Used settings differing from default values: 'Interval' 250ms instead of preset 1000ms (in mini menue appearing after INS which then allows to start a measurement by OK)
S meter settings: 'Options'>'Calibration Settings'>'S-Meter Calibration' - then 'Attack Time' 100 und 'Decay Time" 250ms (otherwise there happens a smoothing over too long a period)
Further experiments with time settings wished for.

!!! Important disclaimer: Please no hasty conclusions about output power. There is still the influence of antennas and ionosphere. Also more experimenting with the millisecond settings is necessary to deal with the myriad of data.

But of course this software option looks at least interesting from a contest adjucation perspective.

CW values:

 

190021002300
4Z5LY00-115
9A1P00-95
9A5Y-108-111-112
CR6K-115-114-115
DD1A0-102-100
DD2ML-110-103-105
DD5M-114-116-114
DF0CI0-95-94
DF1HF-118-1200
DF1LX-96-97-98
DF3AX-111-115-114
DF5RF-120-126-120
DF5SF0-129-127
DJ1AA0-104-102
DJ5MO0-124-121
DJ5MW-94-94-92
DJ8OG0-108-108
DJ9AO0-115-114
DK0EE-930-92
DK0FC0-104-110
DK1IZ000
DK1KC0-109-109
DK3WW0-99-97
DK5CF0-1290
DK5QN-1100-115
DK8ZZ-1100-116
DK9PY0-111-110
DL0MCM-106-106-107
DL0UM-114-118-117
DL0XM-94-96-95
DL1A-91-97-93
DL1ASA0-111-109
DL1BUG-95-104-99
DL1CW-119-124-124
DL1DSW-101-106-105
DL1EKC/P0-126-116
DL1NKS0-1170
DL1QQ0-122-126
DL1WA0-950
DL2CC0-105-104
DL2DWP-11400
DL2LRT0-109-108
DL2SAX0-115-106
DL3DTH0-115-112
DL3JAN-105-113-114
DL4WA-94-96-96
DL5L-100-108-105
DL5WW-105-103-104
DL5YM0-1010
DL6AWJ-120-126-119
DL6IAK-118-128-129
DL6OCH-116-1240
DL6RAI-106-108-108
DL7VEE-97-102-102
DL8AWK00-128
DL8DWW-107-113-111
DM4MN0-116-116
DP9A-99-104-100
DP9Z-99-109-109
DR1D-102-108-99
DR1X000
DR4A-101-105-110
DR5N-96-97-97
DR5X-100-105-106
E79EA-117-117-117
E7DX-990-106
EA2CW0-115-115
EA8RM00-125
EC2DX-120-118-113
ES5YG-117-119-119
EU5C-118-118-107
F4HMX/P-112-1090
F5VBT-127-123-125
FY5KE000
IQ9UI-102-104-98
IS0/OM2VL0-109-105
IZ8JFL/10-1170
K5KG000
KC1XX000
LY4L-117-117-116
LZ1ND-115-1130
LZ2TU00-128
LZ7A-113-98-95
LZ7H000
LZ8E-109-109-104
MD4K-116-113-115
N1RR000
OK1FKD0-125-122
OK1IF000
OK7Z0-103-97
OM3BH-93-94-88
OM3WZ-117-1140
R2AB000
R3QA-116-112-115
R7MM0-122-119
R9GM-119-121-117
RC9A0-116-119
RM1T0-104-111
RT3T0-114-128
RT4W-128-125-124
RW3AI0-130-131
SK3W-105-106-103
SV1ENG0-1150
SV5DKL0-126-122
SW44M000
TM6M0-111-106
UA2F-102-95-94
UA4S-106-105-105
UC7A-122-115-114
UT4U0-103-107
UT5PY000
UT7E0-110-108
UW5Y-114-107-106
UW6M0-125-126
UY5VA00-109
UZ3A0-111-114
YL2QN0-113-116
YO3IRM0-125-123
YR1A-106-102-101
ZD8W0-130-131

 

SSB values:

 

190021002300
9A1P0-950
9A5Y-113-113-107
CR6K0-116-112
DD1A000
DD2ML000
DF0CI000
DF3AX00-113
DJ1AA0-94-94
DJ5MW00-85
DJ8OG0-910
DK0EE-9900
DK1KC0-1180
DK8ZZ0-1000
DL0MCM000
DL0XM000
DL1A00-94
DL1DSW000
DL1NKS-1000-105
DL1QQ0-117-110
DL1WA0-99-91
DL2CC0-104-103
DL2LRT00-103
DL2SAX00-100
DL5L-10700
DL7VEE000
DL8DWW000
DP9A-890-90
DP9Z000
DR1D000
DR1X-83-86-86
DR4A000
DR5N-950-95
DR5X000
E7DX0-100-100
ES5YG0-1190
F4HMX/P000
IQ9UI00-104
IS0/OM2VL00-101
KC1XX000
LY4L0-109-105
LZ7A0-106-91
LZ8E-109-106-107
MD4K-105-105-104
N1RR000
OK7Z-930-98
OM3BH0-86-88
R2AB0-1020
SK3W-112-114-108
SW44M00-120
TM6M-106-1010
UA2F-990-97
UA4S0-1030
UT7E-103-95-96
UW5Y-106-107-104
UW6M000
UZ3A0-113-112
YR1A0-102-97
ZD8W000

 

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