On 08/12/2013 16:36, Chris North wrote:
Most of the discussion here is way above my head, but I'm hoping
somebody will be able to help me.
I have a Sure GPS board, modified according to David Taylor's plan,
connected to a Windows 7 PC by USB (for power only) and by serial
null-modem cable to COM1 on a PCI serial card.
I am running ntpd 4.2.7p401 and have installed the signed serialpps.sys
(14.May.2012 16:08) in place of the standard serial.sys driver. I have
also installed the serialpps-ppsapi-provider.dll with a suitable value
for the PPSAPI_DLLS environment variable.
When I first set this up a year or more ago, I got the GPS_NMEA and PPS
entries displayed in the output from ntpq. However, I have just realised
that PPS is no longer there. NTP is still giving reasonable accuracy -
adequate for my needs - but I'd still like to get PPS working again.
[]
Can anybody suggest anything useful, please?
First question - is the blue PPS LED on the Sure board flashing? Well,
I thought you will have already checked that.
Second, stop the NTP service and see whether my serial port LEDs program:
http://www.satsignal.eu/software/net.htm#SerialPortLEDs
can see the PPS signal. You might be able to isolate any hardware
problems with these two tests. It seems unlikely to be a software
problem as I have the same setup working on a Windows-7/64 and a
Windows-8.1/64 PC, to which the various updated have been applied.
Perhaps the lead to the COM1 port has fallen out?
--
Cheers,
David
Web: http://www.satsignal.eu
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