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daz28
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Mixed Upstream Modulation

I’m seeing a nice variety of upstream modulation, 16, 32 and 64 QAM. Does this signify an issue?

Channel

Frequency (Hz)

Power (dBmV)

Symbol Rate (ksps)

Modulation

Channel ID

1

60300020

51

5120

64 qam

1

2

53700000

52

5120

16 qam

2

3

39400000

51

5120

32 qam

4

4

46200000

50.3

5120

32 qam

3

 

My Downstream Power levels seem a bit off also:

Channel

Frequency (Hz)

Power (dBmV)

SNR (dB)

Modulation

Channel ID

1

138750000

-6.5

36

256 qam

1

2

146750000

-6.5

36

256 qam

2

3

154750000

-6.5

37

256 qam

3

4

162750000

-6.5

37

256 qam

4

5

170750000

-6.5

37

256 qam

5

6

178750000

-6.7

37

256 qam

6

7

186750000

-6.5

36

256 qam

7

8

194750000

-6.5

37

256 qam

8

9

202750000

-6.5

37

256 qam

9

10

210750000

-6.5

37

256 qam

10

11

218750000

-6.9

37

256 qam

11

12

226750000

-7

36

256 qam

12

13

234750000

-7.5

36

256 qam

13

14

242750000

-8

36

256 qam

14

15

250750000

-7.9

36

256 qam

15

16

258750000

-7.2

37

256 qam

16

17

266750000

-6.5

37

256 qam

17

18

274750000

-6.5

37

256 qam

18

19

282750000

-6

37

256 qam

19

20

290750000

-5.9

37

256 qam

20

21

298750000

-5.5

37

256 qam

21

22

306750000

-5.5

37

256 qam

22

23

314750000

-5.2

37

256 qam

23

24

322750000

-5

37

256 qam

24

 

Also a lot of RS errors:

Channel

Locked Status

RxMER (dB)

Pre RS Errors

Post RS Errors

1

Locked

36.6

92815

29403

2

Locked

36.6

77382

23038

3

Locked

37.3

22753

47366

4

Locked

37.3

5340

48228

5

Locked

37.3

3387

44554

6

Locked

37.3

4177

43362

7

Locked

36.6

3501

40929

8

Locked

37.3

3140

40311

9

Locked

37.6

3144

40311

10

Locked

37.3

3048

40208

11

Locked

37.3

32080

41025

12

Locked

36.6

46324

43673

13

Locked

36.6

3716

37887

14

Locked

36.6

18908

145112

15

Locked

36.6

4407

15008

16

Locked

37.6

6798

91457

17

Locked

37.3

5940

92829

18

Locked

37.3

2872

33468

19

Locked

37.6

3280

33926

20

Locked

37.3

4924

103146

21

Locked

37.6

31732

128681

22

Locked

37.6

53512

113035

23

Locked

37.3

22336

148223

24

Locked

37.6

6031

86982

 

The actual service is still pretty fast most of the time, but unreliable with periods of no service every few days that normally needs a reboot to fix. Any advice?

 

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