[ntp:questions] Re: WWV audio driver, FreeBSD, Can't seem to get it going

David L. Mills mills at udel.edu
Mon May 23 18:12:20 UTC 2005


Roger,

This might be a naive suggestion, but are you running the receiver at 
correct bandwidth and mode? It must be AM, of course, and be wide 
enought for the 1-kHz ticks. I usually use a AM receiver with 2.1-kHz 
SSB filter to cover the carrier and sidebands.

Dave

David L. Mills wrote:
> It looks like the program is having a really hard time trying to find 
> the 5-ms matched-filter tick from the WWV/H station. This is kinda 
> chaotic when the SNR is very low. There is not much that can be done 
> about it, as the synch acquistion is fragile. Let it run for awhile; 
> usually it does latch on to the signal, increase the averaging time and 
> get really well.
> 
> Dave
> 
> wa6zvp at gmail.com wrote:
> 
>> * Update.
>>
>> I found another sound card .  I grabbed the latest -dev- train code as
>> well.
>> So now its ntp-dev-4.2.0a-20050518 on freeBSD 5.4-release.
>>
>> Well, things are starting to happen.  Still hasn't fully locked though,
>> a recent chunk of clockstats is appended at the bottom.
>>
>> Lots of wwv1 diags, some wwv2, and an occasional wwv8.  I also am
>> trying
>> the output of a different receiver to make sure the audio is OK.
>> Although
>> not in this sample of clockstats, I've seen wwv3/4 and even 5 messages.
>> Just never quite gets to actually declaring sync.
>>
>> Again, any more ideas on where to go from here would be appreciated.
>>
>>          Roger
>>
>> 53513 17.035 127.127.36.0 wwv1 0100  3765  25.7  7783     1    3    0
>> 53513 18.035 127.127.36.0 wwv1 0100  3988  27.4  7783     0    4    1
>> 53513 19.035 127.127.36.0 wwv1 0100  4122  27.9  7784     1    5    0
>> 53513 20.034 127.127.36.0 wwv1 0100  4290  28.2  7784     0    6    1
>> 53513 21.034 127.127.36.0 wwv1 0100  4488  28.1  7785     1    7    0
>> 53513 22.034 127.127.36.0 wwv1 0100  4634  28.5  7785     0    8    1
>> 53513 22.034 127.127.36.0 wwv2 0100 4634 7783    1  0    8  964    0.00
>> 53513 23.034 127.127.36.0 wwv1 0110  4750  28.7  7786     1    1    0
>> 53513 24.034 127.127.36.0 wwv1 0110  4858  26.8  7787     1    2    0
>> 53513 25.034 127.127.36.0 wwv1 0110  4388  25.7  7788     1    3    0
>> 53513 26.034 127.127.36.0 wwv1 0110  4541  25.6  7788     0    4    1
>> 53513 27.034 127.127.36.0 wwv1 0110  4665  26.1  7788     0    5    2
>> 53513 28.034 127.127.36.0 wwv1 0110  4794  26.8  7789     1    6    0
>> 53513 29.034 127.127.36.0 wwv1 0110  4228  25.6  7790     1    7    0
>> 53513 30.034 127.127.36.0 wwv1 0110  4452  25.4  7790     0    8    1
>> 53513 30.034 127.127.36.0 wwv2 0110 4452 7788    2  0    8    5   26.04
>> 53513 31.034 127.127.36.0 wwv1 0110  4650  26.7  7791     1    1    0
>> 53513 32.033 127.127.36.0 wwv1 0110  4824  27.3  7792     1    2    0
>> 53513 33.033 127.127.36.0 wwv1 0110  4950  26.6  7792     0    3    1
>> 53513 34.033 127.127.36.0 wwv1 0110  5101  28.5  7792     0    4    2
>> 53513 35.033 127.127.36.0 wwv1 0110  5211  29.6  7793     1    5    0
>> 53513 36.033 127.127.36.0 wwv1 0110  5322  31.3  7793     0    6    1
>> 53513 37.033 127.127.36.0 wwv1 0110  5434  32.5  7794     1    7    0
>> 53513 38.033 127.127.36.0 wwv1 0110  5514  33.7  7795     1    8    0
>> 53513 38.033 127.127.36.0 wwv2 0110 5514 7792    2  0    8    4   46.88
>> 53513 39.033 127.127.36.0 wwv1 0110  5584  34.2  7795     0    1    1
>> 53513 40.057 127.127.36.0 wwv1 0110  4895  31.3  7795     0    2    2
>> 53513 41.057 127.127.36.0 wwv1 0110  4291  29.5  7795     0    3    3
>> 53513 42.057 127.127.36.0 wwv1 0110  3758  28.1  7795     0    4    4
>> 53513 43.056 127.127.36.0 wwv1 0110  3299  26.4  7795     0    5    5
>> 53513 44.056 127.127.36.0 wwv1 0110  3153  25.3  7795     0    6    6
>> 53513 45.056 127.127.36.0 wwv1 0110  3542  26.7  7672  -123    7    0
>> 53513 46.056 127.127.36.0 wwv1 0110  3896  28.0  7672     0    8    1
>> 53513 46.056 127.127.36.0 wwv2 0110 3896 7795    6  1    8    3   62.50
>> 53513 47.056 127.127.36.0 wwv1 0110  4180  29.3  7672     0    1    1
>> 53513 48.056 127.127.36.0 wwv1 0110  4375  29.8  7672     0    2    2
>> 53513 49.056 127.127.36.0 wwv1 0110  4553  29.7  7672     0    3    3
>> 53513 50.056 127.127.36.0 wwv1 0110  4729  30.9  7673     1    4    0
>> 53513 51.056 127.127.36.0 wwv1 0110  4940  31.4  7673     0    5    1
>> 53513 52.056 127.127.36.0 wwv1 0110  5127  31.6  7673     0    6    2
>> 53513 53.056 127.127.36.0 wwv1 0110  5161  32.4  7673     0    7    3
>> 53513 54.056 127.127.36.0 wwv1 0110  5222  29.5  7673     0    8    4
>> 53513 54.056 127.127.36.0 wwv2 0110 5222 7673    4  0    8 -122   62.50
>> 53513 55.055 127.127.36.0 wwv1 0110  5335  30.9  7673     0    1    1
>> 53513 56.055 127.127.36.0 wwv1 0110  5411  32.0  7674     1    2    0
>> 53513 57.055 127.127.36.0 wwv1 0110  5440  31.9  7674     0    3    1
>> 53513 58.055 127.127.36.0 wwv1 0110  5536  31.0  7674     0    4    2
>> 53513 59.055 127.127.36.0 wwv1 0110  4864  30.7  7674     0    5    3
>> 53513 60.055 127.127.36.0 wwv8 2 195 WV15 0   308  18.1     1 479674
>> 7674 47930
>> 1
>> 53513 60.055 127.127.36.0 wwv8 2 195 WH15 0    95  13.6     0 167785
>> 7674 16744
>> 1
>> 53513 120.098 127.127.36.0 wwv8 2 203 WV15 1  3133  33.5    22 479674
>> 7675 4796
>> 74
>> 53513 120.098 127.127.36.0 wwv8 2 203 WH15 0   954  24.6     2 324942
>> 7675 3249
>> 42
>> 53513 126.098 127.127.36.0 wwv1 0100  3231  37.9  7332  -342    1    0
>> 53513 127.097 127.127.36.0 wwv1 0100  3401  37.1  7332     0    2    1
>> 53513 128.097 127.127.36.0 wwv1 0100  3496  36.3  7333     1    3    0
>> 53513 129.097 127.127.36.0 wwv1 0100  3708  36.2  7334     1    4    0
>> 53513 130.097 127.127.36.0 wwv1 0100  3487  30.0  7334     0    5    1
>> 53513 131.097 127.127.36.0 wwv1 0100  3811  27.7  7334     0    6    2
>> 53513 132.097 127.127.36.0 wwv1 0100  4049  28.3  7334     0    7    3
>> 53513 133.129 127.127.36.0 wwv1 0100  3547  27.7  7335     1    8    0
>> 53513 133.129 127.127.36.0 wwv2 0100 3547 7334    3  0    8 -339
>> 0.00
>> 53513 134.129 127.127.36.0 wwv1 0110  3113  26.9  7335     0    1    1
>> 53513 137.129 127.127.36.0 wwv1 0100  3007  24.7  7083  -252    1    0
>> 53513 138.129 127.127.36.0 wwv1 0100  3329  26.6  7083     0    2    1
>> 53513 139.128 127.127.36.0 wwv1 0100  3657  28.0  7084     1    3    0
>> 53513 140.128 127.127.36.0 wwv1 0100  3958  29.3  7084     0    4    1
>> 53513 141.128 127.127.36.0 wwv1 0100  3903  30.0  7085     1    5    0
>> 53513 142.128 127.127.36.0 wwv1 0100  3958  31.2  7086     1    6    0
>> 53513 143.128 127.127.36.0 wwv1 0100  4225  31.0  7086     0    7    1
>> 53513 144.128 127.127.36.0 wwv1 0100  4514  31.2  7087     1    8    0
>> 53513 144.128 127.127.36.0 wwv2 0100 4514 7083    1  0    8 -251
>> 0.00
>> 53513 145.128 127.127.36.0 wwv1 0110  4726  31.6  7087     0    1    1
>> 53513 146.128 127.127.36.0 wwv1 0110  4896  32.2  7088     1    2    0
>> 53513 147.128 127.127.36.0 wwv1 0110  5026  32.5  7089     1    3    0
>> 53513 148.128 127.127.36.0 wwv1 0110  5143  32.4  7089     0    4    1
>> 53513 149.128 127.127.36.0 wwv1 0110  4506  32.2  7090     1    5    0
>> 53513 150.128 127.127.36.0 wwv1 0110  4708  33.1  7090     0    6    1
>> 53513 151.127 127.127.36.0 wwv1 0110  4891  32.4  7091     1    7    0
>> 53513 152.127 127.127.36.0 wwv1 0110  5028  32.4  7092     1    8    0
>> 53513 152.127 127.127.36.0 wwv2 0110 5028 7087    1  0    8    4
>> 20.83
>> 53513 153.127 127.127.36.0 wwv1 0110  5108  32.3  7092     0    1    1
>> 53513 154.127 127.127.36.0 wwv1 0110  5223  32.7  7093     1    2    0
>> 53513 155.127 127.127.36.0 wwv1 0110  5354  33.3  7094     1    3    0
>> 53513 156.127 127.127.36.0 wwv1 0110  5461  32.8  7094     0    4    1
>> 53513 157.127 127.127.36.0 wwv1 0110  5514  33.0  7095     1    5    0
>> 53513 158.127 127.127.36.0 wwv1 0110  5570  33.8  7095     0    6    1
>> 53513 159.127 127.127.36.0 wwv1 0110  5646  33.8  7096     1    7    0
>> 53513 160.127 127.127.36.0 wwv1 0110  5679  34.4  7096     0    8    1
>> 53513 160.127 127.127.36.0 wwv2 0110 5679 7092    1  0    8    5
>> 46.88
>> 53513 161.127 127.127.36.0 wwv1 0110  5724  34.2  7097     1    1    0
>> 53513 162.127 127.127.36.0 wwv1 0110  5784  34.2  7097     0    2    1
>> 53513 163.126 127.127.36.0 wwv1 0110  5850  34.1  7097     0    3    2
>> 53513 164.142 127.127.36.0 wwv1 0110  5129  28.3  7098     1    4    0
>> 53513 165.142 127.127.36.0 wwv1 0110  4499  26.3  7098     0    5    1
>> 53513 166.142 127.127.36.0 wwv1 0110  3943  24.5  7098     0    6    2
>> 53513 167.142 127.127.36.0 wwv1 0110  3461  22.7  7098     0    7    3
>> 53513 168.142 127.127.36.0 wwv1 0110  3122  31.5  7098     0    8    4
>> 53513 168.142 127.127.36.0 wwv2 0110 3122 7098    4  0    8    6
>> 78.12
>> 53513 169.142 127.127.36.0 wwv1 0110  3524  33.2  6974  -124    1    0
>> 53513 170.142 127.127.36.0 wwv1 0110  3881  34.7  6974     0    2    1
>>



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