Re: [time-nuts] Thunderbolt vs Z3801A

2008-07-21 Thread SAIDJACK
Hi Didier, the drawback of this approach is that everything is connected together as one big circuit, and thus processor noise can get into the GPS front end and reduce the sensitivity and cause other errors.. For RF performance, it's probably better to have the GPS receiver sit all by

[time-nuts] Thunderbolt vs Z3801A

2008-07-20 Thread Alberto di Bene
Somebody had to pose this question... given the respective sizes of the Trimble Thunderbolt and the HP Z3801A, the simplicity of the first and the complexity of the second, it comes natural to ask ourselves, what advantages does the HP unit have to justify the differences ? Is the Z3801A

Re: [time-nuts] Thunderbolt vs Z3801A

2008-07-20 Thread GandalfG8
In a message dated 20/07/2008 23:33:28 GMT Daylight Time, [EMAIL PROTECTED] writes: Somebody had to pose this question... given the respective sizes of the Trimble Thunderbolt and the HP Z3801A, the simplicity of the first and the complexity of the second, it comes natural to ask

Re: [time-nuts] Thunderbolt vs Z3801A

2008-07-20 Thread Magnus Danielson
[EMAIL PROTECTED] wrote: In a message dated 20/07/2008 23:33:28 GMT Daylight Time, [EMAIL PROTECTED] writes: Somebody had to pose this question... given the respective sizes of the Trimble Thunderbolt and the HP Z3801A, the simplicity of the first and the complexity of the second,

Re: [time-nuts] Thunderbolt vs Z3801A

2008-07-20 Thread Didier Juges
Nuts Subject: [time-nuts] Thunderbolt vs Z3801A Somebody had to pose this question... given the respective sizes of the Trimble Thunderbolt and the HP Z3801A, the simplicity of the first and the complexity of the second, it comes natural to ask ourselves, what advantages does the HP unit

Re: [time-nuts] Thunderbolt vs Z3801A

2008-07-20 Thread Magnus Danielson
Dear Didier, Didier Juges wrote: In my unqualified opinion, Trimble did something very smart with the Thunderbolt. Most previous GPSDOs use a stand alone GPS receiver, with its own CPU clock, to generate the 1PPS signal, to which a separate OCXO is servoed via PLL and occasionaly smart