[time-nuts] Expected behaviour from net4501, oncore and ntpns?

Toby Riddell toby.riddell at prevtec.com
Fri Jan 11 22:12:46 UTC 2019


Hi all,

I got my Soekris net4501 hooked up to an oncore module and antenna and
ntpns has been talking nicely to the oncore. After a couple of hours it
started to serve NTP to a client however the time shown for the net4501 on
the NTP client is approx. 600s slow (see last line):

$ ntpq -p
     remote           refid      st t when poll reach   delay   offset
jitter
==============================================================================
*reverb.baxterit 213.251.128.249  2 u   78  256  377   17.859    0.575
 2.196
+k8s-w01.tblflp. 152.2.133.53     2 u   12  256  377   17.992    2.945
 1.153
+ip225.ip-54-39- 213.251.128.249  2 u  260  256  377   18.229   -0.193
 1.611
x192.168.1.44    .GPS.            1 u   18  256  377    0.830  -619315
 0.484

Also the time of day displayed in 'show oncore 0' is correct, but the year
is wrong (I've obfuscated the position data in the output, but it's
essentially correct):

show oncore 0
serial port = /dev/cuau1
state = 12      visible/track/lock = 13/2/0     dop = 0.0 [m]
1999-05-28 22:02:02.000016953
Leap second info: 2017-01-01 00:00:00 NONE
            555299878 seconds (6427 days) from now
lat = xxxxxxxxxxx (xx.xxxxxxxxx), lon = xxxxxxxxxxx (xx.xxxxxxx), ht xxxx
(xx.xx)
http://maps.google.com/maps?ll=xx.xxxxxxx,xx.xxxxxxx&spn=0.03,0.08&t=k
rcv_status = 0x8 = AcqSat/PosHold
        utc_offset = 18
site_survey = 2 (~3073 sec left)
Sat Dopler Elev Azi Health Mode SigStr IODE Status Offset
  8   3828   12 180   00     8    41      0    a2  0.134221487
 23    969   62 279   00     3     0      0    20  0.385877161
 26  -2039   55  52   00     3     0      0    20  0.436211366
 27   3287   32 157   00     8    46      0    a2  0.452988591

Output from 'show source' and 'show oncore 0 version' is:

show source
Source oncore_0: votes 3.000000 flags <UTC> los 0/15 update 1 SELECTED
        limit 1.280000e-01              No leapsecond at end of today
        stratum 0                       refid [GPS]
        delay 0.000000000               dispersion 0.000000512
        last_ts  927928914.000000102    last_delta 0.000000103

show oncore 0 version
@@Cj
COPYRIGHT 1991-1997 MOTOROLA INC.
SFTW P/N #     98-P36848P
SOFTWARE VER # 3
SOFTWARE REV # 1
SOFTWARE DATE  May 28 1999
MODEL #    R5122U1154
HWDR P/N # 5
SERIAL #   R0ANKH
MANUFACTUR DATE 0M19

I see that the site_survey is still happening - will things correct
themselves if I leave it long enough?

Toby



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