Phil, The T-E datasheet lists timing accuracy at +/-15nS (1 sigma), where did you get the spec that says 20?
Also, the antenna connector on the T-E is a BNC, the old T has an F connector. Didier KO4BB > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of phil > Sent: Monday, May 19, 2008 4:00 AM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] Trimble Thunderbolt EOL > > > ----- Original Message ----- > From: <[EMAIL PROTECTED]> > To: "Discussion of precise time and frequency measurement" > <[email protected]>; <[email protected]> > Sent: Monday, May 19, 2008 3:49 AM > Subject: Re: [time-nuts] Trimble Thunderbolt EOL > > > > While the mini-T is obviously not the same, the -E version > many be nothing > > more than a RoHS compliant version of the original. I've seen many > > changes to devices/assemblies in the past year or two, but > when the smoke > > clears it's nothing but a RoHS-related change. In fact, in > many cases, > > there is no actual change in the device at all. It was > always compliant > > but marketing wanted a *RoHS* part number. > > > > It's been driving me crazy... > > > > -Dave > > -------------- Original message ---------------------- > > From: "Richard W. Solomon" <[EMAIL PROTECTED]> > >> It seems the T-Bolt is being replaced with a newer > version. I wonder > >> which ones we will be getting ?? > >> > >> > http://trl.trimble.com/docushare/dsweb/Get/Document-383748/TBo > lt%20EOL.pdf > >> > >> > >> 73, Dick, W1KSZ > > Dave, > They are getting the old version. Among the older units the > only difference > is firmware revisions. They are getting the "board only" > version that > requires +12, -12 +5 volts, not the 24 volt version you see > on the larger > Trimble photo of the complete unit. > > Apparently the "E" is an altogether different unit. Notice > the antenna > connection is lower than the other connectors. I would bet > the newer unit > has a stand-alone receiver in it. Also note it receives 12 satellites > compared to 8 on the older version. Most other specs are > about the same, > performance wise. > > The old units have the receiver/timebase and associated > electronics on a > single board, all the coax terminals are in a line. The > lower half of the > unit in the Trimble photo has a 24 volt DC to +12, -12, +5 > volt converter. > > The "group" purchased the older version of the "board only" > in a separate > smaller case. It requires +12, -12 +5 volt of which they have > located a > separate power supply for. > > ============================================================== > Trimble Thunderbolt ET GPS Discipline Clock Performance Specifications > > General: L1 frequency, CA/code (SPS) 12-channel continuous > tracking receiver > Update rate: 1 Hz > 1 PPS accuracy UTC 20 nanoseconds (one sigma) > 10 MHz accuracy 1.16 x 10 -12 one average) > 10 MHz stability See graph on Trimble data sheet > Harmonic level -40 dBc max > Spurious -70 dBc max > Phase noise: 10 Hz -120 dBc/Hz > 100 Hz -135 dBc/Hz > 1 kHz -135 dBc/Hz > 10 kHz -145 dBc/Hz > 100 kHz -145 dBc/Hz > Holdover ±1 microsecond over 2 hours with a maximum ±15°C > temperature change > ============================================================== > Trimble Thunderbolt OLD Version > > Performance Specifications: > General: L1 frequency, CA/ code (SPS), 8-channel, > continuous tracking > receiver > Update rate: 1 Hz > PPS accuracy: UTC 20 nanoseconds (one sigma) > 10 MHz accuracy: 1.16 x 10E-12 (one day average) > Interface Specifications: > Prime Power: +24V and return using DC to DC power supply (19V-34V) > Board uses +12V, -12V, +5V and GND > Power consumption 15 watts (cold), 10 watts steady state > Serial Interface: RS-232 through a DB-9 connector > Serial protocoll: Trimble Standard Interface Protocol (TSIP) binary > protocol > at 9600, 8-None-1 > > ================================================================ > Newer "E" Version Data Sheet: > http://trl.trimble.com/docushare/dsweb/Get/Document-383329/022 > 542-010B_Thunderbolt-E_DS_0807.pdf > > Newer "E" Version Manual: > http://trl.trimble.com/docushare/dsweb/Get/Document-388613/Thu > nderboltE_UG_1B.pdf > > Older Version Data Sheet: > http://trl.trimble.com/docushare/dsweb/Get/Document-10015/ > > Older Version Manual: > http://trl.trimble.com/docushare/dsweb/Get/Document-10001/Thun > derBoltBook2003.pdf > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > Internal Virus Database is out-of-date. > Checked by AVG. > Version: 7.5.519 / Virus Database: 269.23.11/1422 - Release > Date: 5/8/2008 5:24 PM > > Internal Virus Database is out-of-date. Checked by AVG. Version: 7.5.519 / Virus Database: 269.23.11/1422 - Release Date: 5/8/2008 5:24 PM _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
