SDS100/SDS200: Does This Indicate Data?

[JASII]

So, when I check the History Log and see this entry, with no Talkgroup ID or UID, is it likely data being sent, this no voice TGID or UID?

This is from a Uniden SDS100.

​

462.200000

R 60

-120

NFM

37

00:00:02

02/23/21 09:01:38

02/23/21 09:01:40

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 462.200000MHz

Conventional

IDS

 

[sonm10]

I dont have any Idas systems to confirm, but dont they have a blip of data every few seconds such as Cap+?

Also, I see the signal strength is quite weak , -120, so could be false decode.

Just curious, the 37, is that the hit counter?

 

[Ubbe]

My experiance from Uniden scanners are that IDS are the most common false decode of conventional analog transmissions. At -120dBm the squelch are just opening up with a lot of noise, so the risk of false decode are high.

/Ubbe

 

[JASII]

That is good to know Ubbe. I do have a bunch of them in various modes. Generally speaking, IF I have activity with BOTH a Talkgroup ID and UID, particularly if it is more than once, it is usually legitimate. The challenge, of course, is separating the valid from the invalid entries!

​

464.475000

CC 14

-106

NFM

138

00:00:04

02/24/21 07:53:15

02/24/21 08:13:41

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 464.475000MHz

Conventional

CAP

​

462.200000

R 39

-110

NFM

38

00:00:04

02/23/21 09:01:38

02/24/21 06:58:58

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 462.200000MHz

Conventional

IDS

​

462.050000/1

CC 2

-120

NFM

4

00:00:02

02/24/21 02:08:23

02/24/21 02:08:25

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 462.050000MHz

Conventional

XPT

​

462.350000/2

CC 4

-115

NFM

4

00:00:02

02/24/21 00:37:55

02/24/21 00:37:57

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 462.350000MHz

Conventional

XPT

​

463.775000

R 35

-120

NFM

3

00:00:02

02/23/21 07:58:21

02/23/21 07:58:23

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 463.775000MHz

Conventional

NX4

​

454.775000

N 4E6

-120

NFM

13

00:00:02

02/22/21 23:34:22

02/22/21 23:34:25

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 454.775000MHz

Conventional

Data

​

463.818750

R 14

-120

NFM

35

00:00:02

02/22/21 19:56:47

02/22/21 19:56:49

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 463.818750MHz

Conventional

IDS

​

451.650000/1

CC 10

-107

NFM

11

00:00:02

02/22/21 17:18:18

02/22/21 17:18:20

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 451.650000MHz

Conventional

CAP

​

454.537500

R 2

-120

NFM

5

00:00:02

02/22/21 16:48:49

02/22/21 16:48:51

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 454.537500MHz

Conventional

NX4

​

464.800000

R 2

-111

NFM

383

00:00:02

02/22/21 14:40:49

02/22/21 14:40:51

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 464.800000MHz

Conventional

IDS

​

454.131250

R 1

-118

NFM

5

00:00:02

02/22/21 14:29:16

02/22/21 14:29:18

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 454.131250MHz

Conventional

NX4

​

454.081250

R 2

-103

NFM

11

00:00:02

02/22/21 12:53:33

02/22/21 12:53:35

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 454.081250MHz

Conventional

NX4

​

454.518750

R 2

-119

NFM

4

00:00:02

02/22/21 11:51:06

02/22/21 11:51:08

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 454.518750MHz

Conventional

NX4

​

454.525000

R 2

-115

NFM

2

00:00:02

02/22/21 11:41:53

02/22/21 11:41:55

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 454.525000MHz

Conventional

NX4

​

454.531250

R 32

-120

NFM

5

00:00:02

02/22/21 11:37:28

02/22/21 11:37:30

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 454.531250MHz

Conventional

IDS

​

454.543750

R 2

-120

NFM

4

00:00:02

02/22/21 11:34:57

02/22/21 11:34:59

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 454.543750MHz

Conventional

IDS

​

454.556250

R 1

-120

NFM

2

00:00:02

02/22/21 11:34:07

02/22/21 11:34:09

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 454.556250MHz

Conventional

NX4

​

454.143750

R 1

-120

NFM

1

00:00:02

02/22/21 10:13:45

02/22/21 10:13:48

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 454.143750MHz

Conventional

NX4

​

454.450000

N 4E6

-114

NFM

16

00:00:02

02/22/21 09:41:09

02/22/21 09:41:11

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 454.450000MHz

Conventional

Data

​

454.550000

N 4E6

-107

NFM

100

00:00:02

02/22/21 09:28:30

02/22/21 09:28:32

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 454.550000MHz

Conventional

Data

​

451.975000

N 4EB

-120

NFM

27

00:00:27

02/19/21 11:10:10

02/22/21 08:55:55

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 451.975000MHz

Data

​

454.137500

R 1

-120

NFM

11

00:00:04

02/20/21 07:05:41

02/22/21 07:59:10

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 454.137500MHz

Conventional

NX4

​

454.600000

N 4E6

-102

NFM

8

00:00:02

02/22/21 07:52:57

02/22/21 07:52:59

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 454.600000MHz

Conventional

Link

​

463.937500

CC 4

-120

NFM

30

00:00:04

02/19/21 14:38:42

02/22/21 07:28:55

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 463.937500MHz

XPT

​

454.250000

R 2

-120

NFM

221

00:00:02

02/22/21 06:31:09

02/22/21 06:31:11

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 454.250000MHz

Conventional

NX4

​

454.018750

R 1

-111

NFM

158

00:00:02

02/22/21 05:24:12

02/22/21 05:24:14

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 454.018750MHz

Conventional

NX4

​

464.925000/2

CC 10

-120

NFM

26

00:00:02

02/21/21 23:48:53

02/21/21 23:48:55

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 464.925000MHz

Conventional

CAP

​

454.025000

R 1

-111

NFM

150

00:00:04

02/20/21 07:08:40

02/21/21 20:06:43

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 454.025000MHz

Conventional

NX4

​

452.000000/2

CC 10

-120

NFM

56

00:00:04

02/19/21 14:21:54

02/21/21 19:47:47

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 452.000000MHz

CAP

​

454.087500

R 61

-120

NFM

239

00:00:15

02/20/21 05:56:08

02/21/21 16:17:43

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 454.087500MHz

Conventional

IDS

​

454.168750

R 2

-96

NFM

234

00:00:06

02/20/21 13:32:22

02/21/21 16:15:18

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 454.168750MHz

Conventional

NX4

​

452.225000/1

CC 10

-105

NFM

172

00:00:02

02/19/21 13:04:35

02/21/21 15:11:04

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 452.225000MHz

CAP

​

451.262500

N 4E6

-120

NFM

189

00:00:23

02/19/21 11:06:08

02/21/21 13:11:17

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 451.262500MHz

Data

​

454.175000

R 2

-109

NFM

169

00:00:04

02/20/21 08:00:44

02/21/21 12:39:22

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 454.175000MHz

Conventional

NX4

​

464.625000/2

CC 14

-105

NFM

2

00:00:03

02/19/21 12:07:15

02/21/21 11:42:57

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 464.625000MHz

XPT

​

454.031250

R 4

-120

NFM

97

00:00:02

02/21/21 10:27:54

02/21/21 10:27:56

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 454.031250MHz

Conventional

NX4

​

464.737500

CC 9

-120

NFM

4

00:00:03

02/19/21 14:06:57

02/21/21 10:00:34

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 464.737500MHz

CON

​

464.600000

CC 9

-107

NFM

4

00:00:02

02/21/21 09:36:50

02/21/21 09:36:52

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 464.600000MHz

Conventional

CON

​

451.075000/1

CC 0

-120

NFM

131

00:00:16

02/18/21 10:04:53

02/21/21 08:45:30

CAP/CON/DMR/DT3/XPT - Active Color Code 0 - Dairyland

Conventional

DT3

​

454.093750

R 2

-96

NFM

318

00:00:02

02/21/21 08:37:00

02/21/21 08:37:03

Digital Search 6.25 Khz - Digital Search 6.25 Khz - 454.093750MHz

Conventional

NX4

 

[GTR8000]

I wouldn't trust any of those hits, as they are all very short bursts with awful signal strength below -100 dBm. If you are truly interested in sniffing out signals like this, you really need to improve your monitoring situation.

 

[JASII]

...If you are truly interested in sniffing out signals like this, you really need to improve your monitoring situation.

What, specifically, are you referring to? Are you thinking of a better receiver, antenna or feedline?

 

[GTR8000]

Improve your reception/signal. Without a reliable signal on these hits, you're never going to get reliable results.