Hi
A lot depends on what your end use is and what you have to work with. There are
Altera FPGA boards that have built in PLL’s that will accept a 5 MHz input. You
can
generate just about anything with them. 10 and 25 MHz (plus 1 pps) with
multiple
outputs of each would be pretty easy. Phase
A frequency doubler and a frequency quintupler will be needed.
Options for the quintupler:
1) Convert to square wave and isolate the desired 25MHz output using filters. A
bandpass filter is a poor choice if high phase stability is required. A high
pass filter supplemented with series tuned
Hi
regarding the 198 Khz reference in the UK can any one in the
UK tell me what the current accuracies are as
I am using 2 Quartzlock and not achieving 4 parts in 10 /8
Regards Paul
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To
The comments are right on. The 8170 depended on the AM signal and a stable
carrier phase. This is pretty much the same for all of the old spectracoms.
That said you have to use an external box to fix the carrier. I built
several different approaches and shared them on Time-nuts. If the archives
Hi
An antenna is pretty much an antenna so it will still work on the “new” WWVB
signal. The receiver
portion of the setup will indeed have issues with the new signal. The rest of
the setup would still
work with an alternate approach to the receiver.
Bob
> On Sep 8, 2019, at 10:55 AM, bill
As I recall, as-is these units don't work with the new WWVB signal format.
however, some enterprising person on this list has a mod for these units
that a search of the archives will discover.
-Eric
On Sun, Sep 8, 2019 at 10:03 AM bill K7WXW wrote:
> I have a stack of Spectracom 8170 WWVB
I have a stack of Spectracom 8170 WWVB synchronized clock boxes, along
with the matching antenna and preamp and an RS232 distribution box. I
found a little documentation for the antenna and preamp but little else.
Wondering if anyone here has any ideas how I might re-purpose them.
They have
Dear all
Can any one point me in the direction of a circuit that can convert
5 Mhz signal to give me 2 outputs one at 10 Mhz and another at 25 Mhz
Regards Paul B
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