27/03/2015 17:14
My T/Thunderbolt has operated flawlessly for some years feeding a
David Partridge frequency divider board. The board gives 10Mhz and
lower divisions of 10MHz down to the KHz level out, as square waves.
What I need to know is, can I T off the T/Thunderbolt 10MHz feed to
this bo
The telco equipment that all these Tbolts came from had the
10 Mhz output feed 2 different modules using a MicroCircuits
ZFSC-2-1-S two-way 0° 50 ohm power splitter. There are some
of these splitters for sale on Ebay but almost any other
similar unit should work.
___
Chris wrote:
can I T off the T/Thunderbolt 10MHz feed to
this board and take a second sine wave output direct from the
Thunderbolt, to drive a transceiver GPS disciplined 10 MHz frequency
standard input as well as having it feed the divider baord
The input impedance of the divider board is nom
Hello,
on 28/03/2015 09:04 you wrote:
> Chris wrote:
>>can I T off the T/Thunderbolt 10MHz feed to
>>this board and take a second sine wave output direct from the
>>Thunderbolt, to drive a transceiver GPS disciplined 10 MHz frequency
>>standard input as well as having it feed the divider baord
Hello,
on 28/03/2015 09:09 you wrote:
> The telco equipment that all these Tbolts came from had the
> 10 Mhz output feed 2 different modules using a MicroCircuits
> ZFSC-2-1-S two-way 0° 50 ohm power splitter. There are some
> of these splitters for sale on Ebay but almost any other
> similar u
Charles
>The input impedance of the divider board is nominally 50 ohms (closer to 45
>ohms, with 1Vrms drive
??? How do you get to that 45 ohm figure. The input has a pair of 100R in
parallel, so I can't see how it can be 45R input impedance. Did you derive
that figure based on observing t
Dave wrote:
??? How do you get to that 45 ohm figure. The input has a pair of
100R in parallel, so I can't see how it can be 45R input impedance.
Also in parallel with the 2x 100 ohm resistors (R2 and R3) is 10k
(R5) in series with 100nF, plus 475 ohms (R1) to a pair of (parallel)
back-to-b
urement
Subject: Re: [time-nuts] Trimble Thunderbolt question, splitting its output.
Dave wrote:
>??? How do you get to that 45 ohm figure. The input has a pair of 100R
>in parallel, so I can't see how it can be 45R input impedance.
Also in parallel with the 2x 100 ohm resistors (R2 and
On Fri, Mar 27, 2015 at 12:22 PM, Chris Wilson wrote:
>
>
> 27/03/2015 17:14
>
> My T/Thunderbolt has operated flawlessly for some years feeding a
> David Partridge frequency divider board. The board gives 10Mhz and
> lower divisions of 10MHz down to the KHz level out, as square waves.
> What I
In my project, I was using LT6957 to share 10Mhz from my TBolt. It was
perfectly fine for my setup. I split 10Mhz to feed the clock of MCU and
second output was connected to DDS block (AD 9852).
Regards,
Vlad
On , Chris Wilson wrote:
27/03/2015 17:14
My T/Thunderbolt has operated flawlessl
Hi
So … what does the TBolt use to buffer the RF? Hmmm …. a logic gate.
I wonder what would work in a gizmo to split the signal …. maybe a couple of
logic buffers?
Costs < $1 for the parts. Works fine.
Bob
> On Mar 29, 2015, at 9:57 AM, Brian Lloyd wrote:
>
> On Fri, Mar 27, 2015 at 12:22
Dave wrote:
I'm not sure how to avoid the change in input impedance with the
clipper involved unless I were to increase R1 to a very much higher value.
The voltage noise density of a 3.3k resistor is about 7.5nV/rootHz,
for a total noise of about 23uVrms in a 10MHz bandwidth (compared to
2.7
Hello,
on 20/05/2015 15:56 you wrote:
> Chris wrote:
>>can I T off the T/Thunderbolt 10MHz feed to
>>this board and take a second sine wave output direct from the
>>Thunderbolt, to drive a transceiver GPS disciplined 10 MHz frequency
>>standard input as well as having it feed the divider baord
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