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xTheEdgex
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Conversationalist

Contributor

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76 Messages

Tuesday, April 25th, 2023 3:01 PM

Closed

Commscope amp question

My house has separate drops from the outside box on the side of the house to 4 TVs and the gateway. So 5 separate drops. I am getting rid of cable and will only have landline and internet through the gateway. So the only drop remaining in use will be the one to the gateway. There's a Commscope amp in the box on the side of the house. The power supply is behind the living room TV. My question is, if the TV drops are no longer used, will this affect anything? Should I not use the amp any longer? Will it damage the amp or the gateway with only one drop being used? I played with it today and have only the gateway being used through the amp, and my internet speeds seem to be fine. If it's advised to leave the amp outside as is, I will be moving the power supply to the room where the gateway is. 

Question

 • 

Updated 

2 years ago

703

4

0

EG

Expert

 • 

110K Messages

2 years ago

That depends on the signal strength coming and going to the system in the first place. If it's adequate, then you don't need the amp, and it's always preferable to not use one if it's not needed. Sometimes amps can actually make things worse ! For example, if there is noise ingress into the line(s), an amp would amplify the noise as well as the signal, and that can make the quality of the connection even worse ! Garbage in = even more garbage out !

Also, nothing will be physically "damaged" if it is left inline but it is better to remove unused runs of coax because they can act as big antennas and inject any possible spurious signals and noise that may be present into your modem's line and even your close-by neighbor's lines.

What you can do is compare the signal level values with and without the amp in place and see.

Try getting them here; http://192.168.100.1 or here http://10.0.0.1 

Please copy all of the text in its entirety of the *Downstream Power Levels*, the *SNR's* (Signal to Noise Ratios), and the *Upstream Power Level* numbers (first with and then without it) and paste them into your next post here and we'll take a look.

(edited)

3

0

xTheEdgex

Contributor

 • 

76 Messages

@EG​   This is with the amp. I'll have to change some cabling around to show it without the amp. Thanks for your help. There was no way to copy and paste the next two correctly.

Downstream
Channel Bonding Value
Index
17
14
15
16
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
0
45
Lock Status
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Frequency
507000000
483000000
489000000
495000000
513000000
519000000
525000000
531000000
537000000
543000000
549000000
555000000
561000000
567000000
573000000
579000000
585000000
591000000
597000000
603000000
609000000
615000000
621000000
627000000
633000000
639000000
645000000
651000000
657000000
663000000
669000000
692800000
SNR
40.946209
40.366287
40.366287
40.366287
40.946209
40.946209
40.366287
40.946209
40.946209
40.366287
40.946209
40.946209
40.946209
40.946209
40.366287
40.366287
40.946209
40.946209
40.946209
40.366287
40.366287
40.946209
40.366287
40.366287
40.946209
40.366287
40.366287
40.366287
40.366287
40.366287
40.366287
43.05 dB
Power Level
6.599998
5.000000
5.199997
6.000000
6.800003
6.900002
7.199997
7.500000
7.699997
7.500000
7.400002
7.300003
7.400002
7.500000
7.199997
7.300003
7.800003
7.599998
7.500000
7.900002
8.099998
8.500000
8.900002
9.000000
8.800003
8.500000
7.900002
7.599998
7.099998
6.099998
6.199997
7.400002 dBm

(edited)

2 years ago

0

xTheEdgex

Contributor

 • 

76 Messages

Upstream

Channel Bonding ValueIndex

1
2
3
4
5

Lock Status

Locked
Locked
Not Locked
Locked
Locked

Frequency

22800000
39600000
16400000
29200000
35600000

Symbol Rate

5120 KSym/sec
1280 KSym/sec
5120 KSym/sec
5120 KSym/sec
5120 KSym/sec

Power Level

56.520599
52.750000
43.770599
54.770599
53.520599

Modulation

64QAM
64QAM
64QAM
64QAM
64QAM

Channel Type

US_TYPE_ATDMA
US_TYPE_ATDMA
US_TYPE_ATDMA
US_TYPE_ATDMA
US_TYPE_ATDMA

2 years ago

0

xTheEdgex

Contributor

 • 

76 Messages

CM Error CodewordsIndex

1
2
3
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12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32

Unerrored Codewords

12168
12048
11916
11751
11635
11504
11370
11229
11097
10957
10817
10702
10571
10387
10273
10143
9995
9855
9725
9594
9454
9340
9175
9032
8917
8754
8608
8492
8361
8228
8088
559030611

Correctable Codewords

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
3735936685

Uncorrectable Codewords

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
3735936685

2 years ago

0

xTheEdgex

Contributor

 • 

76 Messages

2 years ago

This is without the amp.

Downstream
Channel Bonding Value
Index
17
14
15
16
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
0
Lock Status
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Frequency
507000000
483000000
489000000
495000000
513000000
519000000
525000000
531000000
537000000
543000000
549000000
555000000
561000000
567000000
573000000
579000000
585000000
591000000
597000000
603000000
609000000
615000000
621000000
627000000
633000000
639000000
645000000
651000000
657000000
663000000
669000000
0
SNR
35.595078
34.483570
34.483570
35.083549
35.779911
35.595078
36.386890
36.609653
36.609653
36.386890
36.386890
36.386890
36.609653
36.609653
36.386890
36.386890
36.609653
36.386890
36.609653
36.609653
37.355988
37.355988
37.355988
37.355988
37.355988
37.355988
36.609653
36.609653
35.779911
35.779911
35.779911
Power Level
10.599998
9.000000
9.300003
10.000000
10.900002
11.000000
11.199997
11.599998
11.800003
11.699997
11.500000
11.400002
11.599998
11.500000
11.199997
11.300003
11.800003
11.699997
11.500000
12.000000
12.400002
12.900002
13.300003
13.300003
13.300003
13.000000
12.300003
12.099998
11.500000
10.500000
10.599998
Modulation
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
QAM256
OFDM

3

0

xTheEdgex

Contributor

 • 

76 Messages

@xTheEdgex​ 

Upstream

Channel Bonding ValueIndex

1
2
3
4
5

Lock Status

Locked
Locked
Locked
Locked
Locked

Frequency

22800000
39600000
16400000
29200000
35600000

Symbol Rate

5120 KSym/sec
1280 KSym/sec
5120 KSym/sec
5120 KSym/sec
5120 KSym/sec

Power Level

53.020599
50.000000
55.520599
51.270599
50.020599

Modulation

64QAM
64QAM
64QAM
64QAM
64QAM

Channel Type

US_TYPE_ATDMA
US_TYPE_ATDMA
US_TYPE_ATDMA
US_TYPE_ATDMA
US_TYPE_ATDMA

2 years ago

0

xTheEdgex

Contributor

 • 

76 Messages

CM Error CodewordsIndex

1
2
3
4
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6
7
8
9
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12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32

Unerrored Codewords

8566
8402
8289
8158
8027
7889
7774
7628
7484
7368
7236
7062
6948
6796
6650
6510
6378
6238
6101
5988
5844
5705
5590
5459
5327
5189
5059
4929
4790
4674
4544
559030611

Correctable Codewords

0
4
2
2
0
0
0
0
0
0
0
1
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
3735936685

Uncorrectable Codewords

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
3735936685

2 years ago

0

CCOtto

Problem Solver

 • 

497 Messages

Hi, @

 

 

Could you please send our team a direct message with your full name and full address? Our team can most definitely take a further look at this issue.

To send a direct message:
• Click "Sign In" if necessary
• Click the "Direct Message” icon (upper right corner of this page)
• Click the "New message" (pencil and paper) icon
• Type "Xfinity Support" in the to line and select "Xfinity Support" from the drop-down list
• Type your message in the text area near the bottom of the window
• Press Enter to send your message

I no longer work for Comcast.

2 years ago

0

EG

Expert

 • 

110K Messages

2 years ago

You've got some strange numbers going on there........ The downstream power is actually higher (out of spec) without the amp, but the SNR's are lower. And the upstream power is too high (out of spec) either way..... Tough to advise on this one..... Are you sure that the amp is receiving power / powered on ? What is the exact model number of it ?

(edited)

0

EG

Expert

 • 

110K Messages

2 years ago

@xTheEdgex 

You were asked to go private....... Would you please also answer my questions here on the public help boards as it was intended ?

1

xTheEdgex

Contributor

 • 

76 Messages

@EG​    It's a Commscope. Model #CSAPDU9VP. I didn't notice before, but the power light on the front of it isn't on. The power transformer  for it is behind the living room TV, and it did go out once and all my services were affected. Once the new transformer was connected to the coax and plugged in, everything worked fine again. 

The power transformer is connected kind of strange though. The coax comes out of the wall and to a three way splitter. That splitter feeds the power transformer and on to another splitter. The second splitter feeds the TV and the other port on it is unused.

2 years ago

0

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