Empathy List Archives

CQ

Chris Quayle

Mon, Oct 26, 2020 3:45 PM

Hi,

Looking for the user manual for the above gpsdo. At power
up, keeps repeating gps status and time, whereas there
is an internal control mode for setup. Works fine and
locks to gps, but the year is stuck at 2001, suggesting
a date rollover bug.

Internal GPS engine a a (Trimble ?) TNL22880 and a manual
for that would be a help. If the bug is not fixable,
perhaps a later trimble gps engine could be substituted,
as the protocol may be common.

This is a 5MHz unit with pps, and useful around the
lab as a reference for some older test gear...

Regards & Thanks,

Chris

Hi, Looking for the user manual for the above gpsdo. At power up, keeps repeating gps status and time, whereas there is an internal control mode for setup. Works fine and locks to gps, but the year is stuck at 2001, suggesting a date rollover bug. Internal GPS engine a a (Trimble ?) TNL22880 and a manual for that would be a help. If the bug is not fixable, perhaps a later trimble gps engine could be substituted, as the protocol may be common. This is a 5MHz unit with pps, and useful around the lab as a reference for some older test gear... Regards & Thanks, Chris

BK

Bob kb8tq

Mon, Oct 26, 2020 7:28 PM

Hi

Normally a date roll over bug is a non-fixable item in these older
devices. The basic GPS modules simply did not start to have the
“smarts” to handle this until at least a decade after they went out
of production.

Simple answer is to leave it as is and just use the frequency output.
If you need time, get a $10 USB GPS “stick” …. way cheaper than
hacking a working device.

Bob

On Oct 26, 2020, at 11:45 AM, Chris Quayle syseng@gfsys.co.uk wrote:

Hi,

Looking for the user manual for the above gpsdo. At power
up, keeps repeating gps status and time, whereas there
is an internal control mode for setup. Works fine and
locks to gps, but the year is stuck at 2001, suggesting
a date rollover bug.

Internal GPS engine a a (Trimble ?) TNL22880 and a manual
for that would be a help. If the bug is not fixable,
perhaps a later trimble gps engine could be substituted,
as the protocol may be common.

This is a 5MHz unit with pps, and useful around the
lab as a reference for some older test gear...

Regards & Thanks,

Chris

time-nuts mailing list -- time-nuts@lists.febo.com
To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
and follow the instructions there.

Hi Normally a date roll over bug is a non-fixable item in these older devices. The basic GPS modules simply did not start to have the “smarts” to handle this until at least a decade after they went out of production. Simple answer is to leave it as is and just use the frequency output. If you need time, get a $10 USB GPS “stick” …. way cheaper than hacking a working device. Bob > On Oct 26, 2020, at 11:45 AM, Chris Quayle <syseng@gfsys.co.uk> wrote: > > Hi, > > Looking for the user manual for the above gpsdo. At power > up, keeps repeating gps status and time, whereas there > is an internal control mode for setup. Works fine and > locks to gps, but the year is stuck at 2001, suggesting > a date rollover bug. > > Internal GPS engine a a (Trimble ?) TNL22880 and a manual > for that would be a help. If the bug is not fixable, > perhaps a later trimble gps engine could be substituted, > as the protocol may be common. > > This is a 5MHz unit with pps, and useful around the > lab as a reference for some older test gear... > > Regards & Thanks, > > Chris > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there.

OS

Ole Stender Nielsen

Mon, Oct 26, 2020 7:57 PM

Hi,
The 1804M was produced in different versions.
Is your unit merely called 1804M, or perhaps 1804M MK2, or 1804M3?
BR
Ole

Den 26-10-2020 kl. 16:45 skrev Chris Quayle:

Hi,

Looking for the user manual for the above gpsdo. At power
up, keeps repeating gps status and time, whereas there
is an internal control mode for setup. Works fine and
locks to gps, but the year is stuck at 2001, suggesting
a date rollover bug.

Internal GPS engine a a (Trimble ?) TNL22880 and a manual
for that would be a help. If the bug is not fixable,
perhaps a later trimble gps engine could be substituted,
as the protocol may be common.

This is a 5MHz unit with pps, and useful around the
lab as a reference for some older test gear...

Regards & Thanks,

Chris

time-nuts mailing list -- time-nuts@lists.febo.com
To unsubscribe, go to
http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
and follow the instructions there.

Hi, The 1804M was produced in different versions. Is your unit merely called 1804M, or perhaps 1804M MK2, or 1804M3? BR Ole Den 26-10-2020 kl. 16:45 skrev Chris Quayle: > Hi, > > Looking for the user manual for the above gpsdo. At power > up, keeps repeating gps status and time, whereas there > is an internal control mode for setup. Works fine and > locks to gps, but the year is stuck at 2001, suggesting > a date rollover bug. > > Internal GPS engine a a (Trimble ?) TNL22880 and a manual > for that would be a help. If the bug is not fixable, > perhaps a later trimble gps engine could be substituted, > as the protocol may be common. > > This is a 5MHz unit with pps, and useful around the > lab as a reference for some older test gear... > > Regards & Thanks, > > Chris > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there.

time-nuts@lists.febo.com

Rapco 1804M manual and Control Mode Access ?