[time-nuts] Trimble Thunderbolt EOL

Didier Juges didier at cox.net
Mon May 19 07:27:56 EDT 2008


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: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] 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: <d.seiter at comcast.net>
> To: "Discussion of precise time and frequency measurement" 
> <time-nuts at febo.com>; <time-nuts at febo.com>
> 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" <w1ksz at earthlink.net>
> >> 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 
> 
> 
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