[time-nuts] Trimble Thunderbolt no longer determines the correct date

At one time one of the Chinese sellers of Tbolts was upgrading their firmware from 2.x to 3.0 I don't know how they did that... perhaps they extracted a 3.0 image via something like JTAG or pulling a chip and dumping it. -- > Unfortunately the unit that you have does not

Re: [time-nuts] Thunderbolt - trouble locking with some types of antennas

Hi Jerry: The Trimble is the oldest mass produced GPS receiver I know of and because the early receivers used high gain antennas it seems that Trimble kept that idea for the newer designs. They like about 41 dB gain between the antenna and the input to the receiver.

Re: [time-nuts] Trimble Thunderbolt no longer determines the correct date

> Unfortunately the unit that you have does not allow for a fw update. Oh well it was worth asking. Dave -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob kb8tq Sent: 31 July 2017 17:30 To: Discussion of precise time and frequency measurement

Re: [time-nuts] Thunderbolt - trouble locking with some types of antennas

Hi > On Jul 31, 2017, at 3:32 PM, Didier Juges wrote: > > The Thunderbolt is well known for not having the best sensitivity among GPS > receivers. It seems that timing receivers in general, particularly those of > the same generation as the Thunderbolt are not as sensitive

[time-nuts] Looking for OSA 3210 information

Hello time-nuts, I'm looking for a User Manual or Service Manual for the Oscilloquartz OSA 3210 cesium standard. So far my search has turned up nothing. TVB as a User Manual for the OSA3200, which I assume is an earlier (though similar model). The cesium unit is an OSA 3000 and any

Re: [time-nuts] Thunderbolt - trouble locking with some types of antennas

The Thunderbolt is well known for not having the best sensitivity among GPS receivers. It seems that timing receivers in general, particularly those of the same generation as the Thunderbolt are not as sensitive as navigation (possibly newer) GPS receivers. It may be because they are expected to

Re: [time-nuts] Thunderbolt - trouble locking with some types of antennas

Hello Jerry, I think the problem is not at the antenna, I consider the 58532A to be a lot better than these smal patch antennas. But the point is that modern receivers have a significant better sensivity! In my opinion, indoor position of any kind of antenna is not a good solution if you want to

[time-nuts] Thunderbolt - trouble locking with some types of antennas

Due to access problems, I run my Thunderbolt with a Symmetricom 58532A antenna placed indoor near a window facing South… can’t get much worse but most of the time it will be locked onto 3 or 4 satellites.I recently bought a www.leobodnar.com GPSDO for my SDR ham

Re: [time-nuts] Trimble Thunderbolt no longer determines the correct date

Hi Trimble, even on supported products, is pretty firm about a service contract being in place for updates. The only exception seems to be security related patches. There have been a lot of examples of this over the years ….AFIK, there isn’t even a “public” firmware loader for the TBolt.

Re: [time-nuts] Trimble Thunderbolt no longer determines the correct date

I emailed Trimble on the off chance they might have a firmware upgrade. They sent me an email which covered some units that rolled over in Feb. 2016 for which they say they have no upgrade. I sent them all the information on the label stuck to the outside of my TB (one of the group buy set),