Hi
If you *need* to lock one of the new FE-5680's 10 or 20 Hz high, you
probably can adjust the cap on the VCXO center it's range up there. I doubt
it will reliably adjust out to 300 Hz though. For that parts changes or
board surgery probably are required.
Bob
-Original Message-
From:
At 01:21 AM 1/26/2012, Rex wrote:
physical differences (like an sma output). Also, FEI has not been
responsive, to my knowledge, to any questions from us surplus
consumers/hackers.
I wonder if they'd be responsive to a 'group-buy' of documentation or
answers? Maybe it comes down to whether
On Thu, Jan 26, 2012 at 9:13 AM, Bob Camp li...@rtty.us wrote:
Hi
If you *need* to lock one of the new FE-5680's 10 or 20 Hz high, you
probably can adjust the cap on the VCXO center it's range up there.
The frequency division is done by digital logic inside a CPLD and
you'd need to re-program
Hi
The PPS would indeed be off if you move the 10 MHz (no matter how you do
it). The range of the output relative to the 380 Hz digital tune range is
restricted by the pull range of the VCXO. There have been plots posted
showing the pull range, and it's (lack of) centering.
No need to re-shoot
At 11:36 AM 1/26/2012, Chris Albertson wrote:
The option 2 that is in the book is different from the fine scale
adjustment the current $40 can do. the true option two units can be
programmed over a range of many MHz by sending RS232 commands but the
current units can only by programmed over
Chris,
Thank you for the input on the subject. I'll keep my eyes open for
the two different kinds. In all honesty, I probably don't need to alter
the frequency... I just like the ability to interrogate the unit for
other values such as reading the ADC's and health status bits. I've seen
On 1/22/2012 9:49 AM, Chris Albertson wrote:
The current batch of (about) $40 units are different from what was
available a year ago. These new ones require 5V DC input in addition
to 15V and can only be programmed via RS232 a few Hz away from 10MHz.
So they are only good for use as a 10MHz
The current batch of (about) $40 units are different from what was
available a year ago. These new ones require 5V DC input in addition
to 15V and can only be programmed via RS232 a few Hz away from 10MHz.
So they are only good for use as a 10MHz reference
Option 2 in the book refers to a
All,
I've been on the sidelines of being a time nut for a while now and
I'm working on getting back into things. Before I drifted away from my
hobbies, I remember the FE-5680's being around, but I didn't know much
about them and was more interested in GPSDO's. I think I'd like to help
