The Utah VHF Society
Repeater signal strength/sensitivity analysis page
Updated on 13 September, 2017

The scope of this document:

This page exists as a convenient place to post various signal strength readings and apparent sensitivities of various repeaters.  The major purpose of this page is to keep track of the sensitivity of key repeater systems over time.  These readings may be used to provide a comparison over time of transmitter and receiver effectiveness as well as a bellwether of potential site noise issues.

These readings are updated upon request and/or on a semi-regular basis pending the availability of equipment.

The following are the parameters of the measurements and the equipment used to make these measurements:

Comments on the above equipment: Repeaters that are included in this list:

As mentioned above, this list is primarily for those sites in the Oquirrh range in line-of-sight to the measuring antenna.  If a system that fills this criterion is not listed and you wish measurements to be included, send an email to the address at the bottom of the page.

Those systems not fulfilling the criterion may be requested to be measured with the understanding that these readings may be wildly skewed by various factors, including:

Because of these effects, measurement of indirect signals may be used only as a very rough indication of overall trends.
 

Receive-Only monitoring data:

These readings are of the signals as received and, in the case of those receive via line-of-sight and unobstructed path, may be used to indicate transmitter system performance over time.  Those marked with asterisk (*) are believed to be non line-of-sight readings maym be inconsistent due to path variations.

Signal level is measured in dBm at the spectrum analyzer's 50 ohm input.
 
Output
Frequency
(MHz)
7/2
2000
1/22
2001
4/2
2001
3/7
2002
5/12
2002
10/17
2002
8/28
2003
11/05
2003
12/30
2003
1/20
2004
3/15
2004
5/19
2004
7/15
2004
11/5
2004
3/16
2005
9/2
2005
12/27
2005
3/24
2006
7/28
2006
11/15
2006
5/4
2007
10/02
2007
4/4
2008
10/23
2008
3/27
2009
9/21
2009
1/20
2010
5/12
2010
9/17
2010
1/28
2011
12/13
2011
9/28
2012
12/21
2012
8/23
2013
2/4
2015
11/19
2015
9/13
2017
53.150 - - -58 -62 -54 -55 -57 -56 -57 -58 -59 -58 -60 -58 -57 -57 -61
-63
-63
-61
-61
n/r
-59
-59
-57
-57
-58
-63
-63
-64
-65
-64
-68
-64
-59
-64 -64
145.125 *
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-70
-70
-67
-67
-67
-68
-65
-66
-65
n/r
-96 -
145.190
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-56
-57
-56
-57
-58
-57
-57
-57
-56
-56
-55
-55
-54
-57
-63
-63
-64
-60
-56 -65
145.450 -61 -64 -64 -69 -65 -65 -68 -68 -70 -69 -72 -70 -69 -69 -66 -68 -65
-68
-68
-68
-65
-70
-65
-68
-67
-67
-67
-63
-66
-66
-63
-64
-63
-63
-58
-64 -64
146.620
Farnsworth
-67 -63 -62 -81 -61 -64 -60 -59 -68 -75 -59 -59 -60 -58 -59 -58 -58
-60
-59
-57
-58
-58
-59
-59
-59
-61
-61
-69
-68
(-61)
-64
-63
-63
-62
-63
-59
-62 -62
146.620
UHF TX
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-80
-81
-82
-84
-83
-88
-89
-76
-82 -82
146.700 #
- - - - - - - -86 -86 -98 -78 -77 -77 -78 -75 -77 -77
-74
-77
-75
-70
-72
-68
-68
-68
-66
-66
-64
-65
-62
-66
-67
-65
-65
-61
-65 -73
147.760 #
-87 - - - - - -90 -89 -89 -89 -92 -92 -91 -90 -89 -89 -88
-88
-91
-90
-90
-92
-90
-90
-90
-90
-92
-88
-87
-92
-91
-91
-89
-89
-75
-87 -85
146.880  -76 7/2/00 rdg is from Bacchus site -57 -55 -55 -57 -57 -58 -62 -62 -59 -59
-59
-59
-58
-58
-58
-58
-59
-59
-58
-61
-57
-58
-57
-76
-82
-85
-76
-56
-55 -71
146.940 -54 -56 -55 -60 -57 -57 -57 -57 -56 -57 -58 -56 -57 -55 -56 -56 -56
-58
-54
-57
-57
-58
-58
-58
-58
-52
-54
-57
-57
-57
-66
-67
-58
-67
-65
-56 -60
147.040 #
- - - - - - - -80 -82 -81 -81 -84 -84 -83 -87 -85 -82
-83
-83
-86
-84
-84
-83
-84
-85
-85
-85
-91
n/r
-85
-83
-90
-86
-93
-90
-85 -99
147.080 #
- - - - - -79 -80 -78 -78 -81 -78 -79 -79 n/r -77 -78 -76
-76
-79
-76
-76
-71
-71
-70
-70
-74
-77
-72
-74
-77
-78
-78
-76
-78
-77
-77 -76
147.120 -67 -67 -66 -55 -52 -53 -53 -53 -54 -53 -52 -53 -54 -54 -54 -54 -54
-54
-54
-54
-56
-42
-42
-43
-42
-41
-44
-47
-49
-48
-49
-49
-47
-57
-63
-59 -55
147.140 - - - - -58 -58 -58 -58 -60 -60 -59 -59 -59 -58 n/r -58 -58
-58
-58
-58
-57
-58
-58
-59
-59
-59
-58
-61
-59
-61
-66
-67
-65
-67
-67
-66 -67
147.160 #
- - - - -65 -65 -66 -68 -69 -70 -69 -70 -77 -70 -70 -72 -70
-72
-73
-71
-75
-62
-61
-60
-59
-59
-65
-62
-60
-60
-61
-60
-61
-61
-63
-63 -68
147.180 #
-88 -91 -91 -104 - -90 -95 -92 -91 -93 -93 -94 -95 -92 -91 -90 -92
-93
-92
-91
-94
n/r
n/r
-91
-90
-90
-92
-90
-90
-95
-91
-94
-95
-95
-95
-93 -99
147.380 *
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-77
-77
n/r
-77
-74
-77
-75
-76
n/r
n/r
-79
-
-
447.950
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-78
-75
-82 -
448.075 *
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-76
-92
-95
-81
-80
-81
-87
-82
-82
-78
-82
448.150
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-77
-78
-81
-77
-78
-85
-80
-79
-82
-81
-81
-81
-78
-77 -81
448.400
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-73
-75
-72
-73
-72
-71
-75
-73
-73 -76
448.725 *
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-75
n/r
-77
-74
-76
-76
-75
-75
-74
-75
-
-
449.000 #
- - - - -73 - -76 -74 -83 -77 -74 -73 -74 -74 -74 -74 -73
-73
-81
<-107
-72
-89
-85
-87
n/r
-71
-72
-69
-70
-75
-69
-68
-68
-69
-68
-69 -69
449.100 -79 -76 - -75 -76 -76 -74 -75
(-109)
-75
(-109)
-75
(-107)
-76 -74 -81 -82 -79 -80 -107
-107
-84
n/r
n/r
n/r
n/r
n/r
n/r
n/r
n/r
n/r
-
-
-
-
-
-
-
n/r n/r
449.150


































-70
-70 -84
449.425 - - - - - - - - -86 -87 -83 -96 -95 -82 -79 -90 -88
-90
-91
-83
-91
-83
-81
-87
-69
-68
-99
-68
-70
-76
-70
-69
-69
-69
-69
-69 -72
449.475 #
- - - - - - - - -86 -83 -83 -89 -92 -87 -85 -85 -82
-82
-87
-81
-83
-88
-81
-88
-83
-104
-84
-85
-88
-87
-110
-84
-84
-110
-109
n/r n/r
449.500 -77 -70 -71 -74 -71 -71 -74 -72 -73 n/r -73 -73 -92 -74 -73 -74 -75
-75
-93
-63
-64
-67
-67
-67
-68
-67
-68
-69
-67
-67
-66
-67
-68
n/r
-72
-73 -73
449.900
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-82
-84
-81
-81
n/r
n/r
n/r
-
n/r n/r
Intertie 1.25m
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-59
-60
-60
-61
-60 -61
Intertie 70cm
North Link
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-93
-81
-87
-96
-95 -93
1287.000 *
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-100
-100
-106
-100

System receiver sensitivity measurements:

These readings are of the amount required to be detected by the repeater's receive system.  For those repeaters with an unobstructed line-of-sight path, these readings may be used to indicate general receive system performance over time.

Signal level is in dBm at the generator's output.

Output
Frequency
(MHz)
7/2
2000
1/22
2001
4/2
2001
3/7
2002
3/12
2002
5/12
2002
10/17
2002
8/28
2003
11/05
2003
12/30
2003
1/20
2004
3/15
2004
5/19
2004
7/15
2004
11/5
2004
3/16
2005
9/2
2005
12/27
2005
3/24
2006
7/28
2006
11/15
2006
5/4
2007
10/02
2007
4/7
2008
10/23
2008
3/27
2009
10/21
2009
1/20
2010
5/12
2010
9/17
2010
1/28
2011
12/13
2011
9/28
2012
12/21
2012
8/23
2013
2/4
2015
11/19
2015
9/13
2017
53.150 - - +5
+13
+5
+13
+9
+15
+7
i/s
+2
+10
-1
+5
+6
+13
+4
+13
+5
+13
+7
+13
+6
+13
+8
>+13
+8
>+13
+5
+13
+3
+13
i/s
+13
i/s
+13
i/s
+13
i/s
+13
i/s
n/r
i/s
+13
i/s
+13
i/s
+9
+15
+10
i/s
+10
i/s
+15
i/s
+15
i/s
+13
i/s
+7
i/s
+7
i/s
+16
i/s
+12
i/s
12
i/s
+10
i/s
145.125 *
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
i/s
i/s
+6
+15
+4
+13
i/s
-
i/s i/s i/s
-
-
145.190
-
-
-
-
-
-
-
-
-
-
-
New
entry
as
of
3/24
2006
-
0
+8
0
+3
0
+9
-5
+3
+7
+12
0
+8
-1
+4
-3
+4
-2
+4
0
+8
-10
-6
0
+7
-15
+15
-15
+9
i/s +12
i/s
+13
i/s
+13
i/s
+12
i/s
+2
+10
145.450 -3
i/s
-4
n/d
-4
n/d
i/s
i/s
-6
-6
-6
-2
-7
-3
+2
+7
-7
-5
-7
-1
-6
-2
-4
0
-2
+2
0
+9
+1
+3
-5
+3
-2
+3
-3
+3
-4
+5
+3
+7
-2
+7
-7
-2
-2
+9
-5
+2
-2
+5
-5
-2
-2
+8
-4
+3
-10
-6
-1
+7
-5
+3
-10
0
-5
0
0
+3
-6
-1
-6
-2
-10
-3
-1
+3
146.620
Farnsworth
-1
+5
-1
n/d
-4
n/d
-3
+1
-6
-3
-8
-5
-3
-7
-7
-2
-12
-7
-7
-4
-7
-2
-6
-1
-7
-4
-5
-2
-6
+2
-3
+3
-5
-1
-3
+2
-3
+3
-5
+2
-5
+2
-5
+3
-4
+1
-5
0
-3
+3
0
+5
-8
-5
-10
-2
-6
0
-5
+4
-2
+4
-8
-2
-10
-5
-5
+3
-5
-2
-7
0
-6
0
-3
+1
146.940 -4
+2
-1
n/d
0
n/d
i/s
-4
0
-7
+1
-7
-3
-4
+1
-7
-3
-13
-6
-8
-2
-4
+4
-8
-3
-12
-2
-10
-3
-2
+5
-7
-4
-10
-3
-11
-2
-10
-3
-5
+4
-4
+3
-2
+9
-10
0
-11
-2
-1
+10
-5
+9
0
+8
+9
+13
-4
+3
-10
+2
+9
i/s
-5
i/s
+10
i/s
+1
+1
-3
-3
-6
+5
0
+15
147.120 0
+1
-5
n/d
0
i/s
i/s
-14
-10
-17
+8
-7
-3
+4
+11
-10
-5
-15
-6
-15
-7
i/s
-15
-7
-18
-5
-14
-6
-2
+4
-13
-4
-14
-8
-13
-4
-10
-3
-7
0
-6
-1
+2
+8
+10
i/s
-5
+2
-7
-3
-6
+3
+7
+13
-7
-6
0
+9
-13
-5
+5
i/s
-8
+7
-1
+5
-6
0
-5
+13
-5
+1
-3
-1
147.140 - - - - - -13
-1
-7
-2
-2
+4
-11
-6
-8
-6
-7
-1
-4
0
0
+5
-13
-5
-4
+2
n/r -5
-3
-10
-7
-10
-4
-2
+3
-5
+1
-7
-4
-4
+5
+3
+10
-1
+5
-5
-3
+3
+8
-4
+3
-5
+1
0
+7
-10
-3
-10
0
-10
-4
-4
+1
-5
+2
-5
+1
-5
+1
-3
+1
147.160 #
- - - - - 0
+8
+2
+8
+7
>=+13
+4
+9
+4
+10
+5
+10
+6
+13
0
+4
+2
+7
0
+5
-2
+4
-2
+3
-1
+5
-4
+2
0
+5
-3
+2
-1
+5
+4
+13
+3
+5
+1
+6
-5
+4
+3
+8
-4
+3
+8
+13
+8
i/s
-3
+8
+8
i/s
-2
+10
+8
+14
+6
+14
+8
+13
+8
+13
+9
i/s
147.380 *
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
12/
15
-8
+13
i/s
n/r
i/s
i/s
i/s
i/s
-
i/s i/s i/s
-
-
448.075 *
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+13
i/s
i/s
i/s
i/s
+13
i/s
-
i/s i/s i/s
-
-
447.950 *
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
i/s

448.150
-
-
-
-
-4
+1
-4
+2
-5
+1
-1
+5
-6
-2
-6
-3
-8
-2
-4
+2
0
+6
-4
+2
0
+6
+5
+2
-2
+2
+5
+10
0
+5
+5
+10
-5
0
-5
+1
n/r
+3
+8
+5
+9
+1
+5
-2
+5
-2
+3
+2
+7
+7
+12
+3
+8
+2
+8
+2
+10
+3
+5
+2
+9
0
+1
-1
+14
0
i/s
448.400
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+2
+7
+2
+7
+1
+6
0
+4
+4
+10
+6
+9
+7
+10
+6
+9
+7
+11
+7
+12
448.725 *
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-5
+5
n/r
i/s
i/s
-4
+4
-7
-3
-
i/s i/s i/s

-
449.000  - - - - - -6
+2
- >=+13
i/s
+1
>=+13
>=+13
i/s
0
+7
+2
+7
+13
i/s
+5
+12
+5
+11
+5
+12
+8
+14
0
+4
0
+5
+4
+10
0
+5
0
+7
0
+8
0
+8
+4
+10
n/r
-5/
+5
-7
0
-6
+1
-2
+4
-5
-3
-4
-4
-6
0
-1
+3
-2
+3
-4
-3
0
+3
2
2
449.100 +9
+11
+10
i/s
+5
i/s
i/s
- -6
+2
+2
+9
>=+13
i/s
+7
+12
+9
+13
+7
+13
+13
i/s
i/s
+13
i/s
+13
+13
+9
+13
+11
+14
+10
+13
+9
+12
+12
+15
n/r
n/r
n/r
n/r
n/r
n/r
n/r
n/r
n/r
off
air
off
air
off
air
off
air
off
air
off
air
off
air
off
air
off
air
449.100 UHF
Ctl RX
- - +5
n/d
i/s
+13
+13
+10
+13
+10
i/s
+10
>=+13
+7
+11
+10
+13
+7
+13
+13
i/s
+10
i/s
i/s
+13
+13
i/s
i/s
+14
+14
+13
i/s
+13
+13
+12
+12
n/r
n/r
n/r
n/r
n/r
n/r
n/r
n/r
n/r
n/r
off
air
off
air
off
air
off
air
off
air
off
air
off
air
off
air
449.150



































0
+4
-3
-3
n/r
449.425 - - - - - - - - - i/s
i/s
i/s
i/s
i/s
+12
i/s
+5
+8
i/s
i/s
+8
+10
+13
i/s
+12
i/s
+8
+10
+9
+13
+8
+12
i/s
+13
i/s
-10
-4
-9
-2
-10
-4
-7
-1
i/s
-10
0
-6
0
-6
0
-5
-3
-6
0
-5
-3
+1
+6
-1
-1
449.475 - - - - - - - - - >=+13
i/s
+12
+12
+13
+13
i/s
+13
i/s
i/s
i/s
i/s
i/s
i/s
i/s
i/s
i/s
i/s
i/s
+13
i/s
i/s
i/s
i/s
i/s
i/s
i/s
i/s
i/s i/s i/s
i/s - -
449.500 +8
+11
i/s
i/s
i/s
+12
+15
+9
+9
0
0
-5
0
+1
+3
+1
+1
OFF
AIR
+5
+5
+6
+6
+4
+4
+2
+2
+5
+5
+11
+11
+6
+6
+4
+4
+6
+6
+1
+4
+6
+10
-1
0
+1
+7
+6
+8
-2
+1
-2
+2
+4
+7
-3
-3
-4
-4
-5
-4
-7
-5
-6
0
-6
-6
off
air
+6
+6
+6
+7
+6
i/s
449.900
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+12
i/s
+14
i/s
+3
+15
+3
+15
n/r
n/r
off
air
off
air
off
air
off
air

Key to abbreviations:

General comments on all data:
Comments on the 9/13/17 readings:

Comments on the 11/19/15 readings:

Comments on the 2/4/15 and 2/6/15 readings:

Comments on the 8/23/13 readings:

Comments on the 12/21/12 readings:

Addendum - 10/11/12:
Comments on the 9/28/12 readings:

Comments on the 12/23/11 readings:


Comments on the 1/28/11 readings:


Comments on the 9/17/10 readings:

Comments on the 5/12/10 readings:

Comments on the 1/20/10 readings:

Comments on the 10/21/09 readings:

Comments on the 3/27/09 data:

Amendment, 12/15/08:

Comments on the 10/23/08 data:

Comments on the 4/7/08 data:


Comments on the 10/2/07 data:

Comments on the 5/4/07 data:

Comments on the 11/15/06 data:

Comments on the 7/28/06 data:

Comments on the 3/24/06 data:

Comments on the 12/27/05 data:

Comments on the 9/2/05 data:

Comments on the 3/16/05 data:


Comments on the 11/5/04 data:


Comments on the 7/15/04 data:


Comments on the 5/19/04 data:


Comments on the 3/15/04 data:


Comments on the 1/20/04 data:

Comments on the 12/30/03 data:
  • These readings were taken from approx. 1800 to 1830 MST.
  • 449.100:  This repeater's TX still has an intermittent problem.  The signal level in parentheses is that when the TX is malfunctioning.
  • 449.000:  This repeater continues to degrade in both TX and RX performance.
  • 449.425 and 449.475:  Data was obtained at 1200 MST on 12/31/03.
  • 146.620:  As of 12/30/03, the radiated power of this repeater is nearly 10 dB below normal.  As of 1/7/04, the readings had not changed.
  • The noise floor at VHF on Farnsworth Peak continues to be at a low level.

  • Comments on the 11/05/03 data:


    Comments on the 8/28/03 data:


    Comments on the 10/17/02 data:

    Comments on the 5/12/02 data:

    Comments on the 3/7/02 and 3/12/02 data:

    Comments on the 7/2/00 data:
    Related links:


    If you have any questions or comments on information on this page, send an email to the address on this page.

    Go back to the UVHFS Frequency Coordination page, or the UVHFS Main Page.