I think there is something funny about the 1 PPS output on pin 6 from the
currently available cheap FE-5680A units. I have three of these units. On one
unit, on one occasion, I did observe a logic-level 1 PPS pulse, exactly 1
microsecond wide. But after a power cycle it never came back,
On Thu, Jan 5, 2012 at 9:46 AM, beale be...@bealecorner.com wrote:
I think there is something funny about the 1 PPS output on pin 6 from the
currently available cheap FE-5680A units. I have three of these units. On
one unit, on one occasion, I did observe a logic-level 1 PPS pulse, exactly
1
If you use a Tektronix TDS series scope you can set the acquiring to peak
detect instead of sample to let the PPS be visible even for long timebase
run. That is: usually, with the trigger set to normal and the timebase to
100nS/div or 1uS/div you can see the PPS anyway. If you set the timebase to
The 2230 like I have was the earliest Tektronix oscilloscope with peak
detect that I know of. Everything after it with some odd exceptions
like the TDS 620 series included peak detect.
I bought and fixed the 2230 instead of a new Rigol just for the peak
detect. The low end Rigol oscilloscopes
Hi Chris,
The documentation I have says pin 6 is N/C but it looks like there is a
way to extract a usable PPS but I think I'm going to need and LC filter,
some op amps and a one-shot and a TTL level driver. My guess is that pin
6 is either some kind of engineering test/diagnostic signal not
On Thu, Jan 5, 2012 at 1:48 PM, b...@lysator.liu.se wrote:
Hi Chris,
The documentation I have says pin 6 is N/C but it looks like there is a
way to extract a usable PPS but I think I'm going to need and LC filter,
some op amps and a one-shot and a TTL level driver. My guess is that
pin
Chris,
On Thu, Jan 5, 2012 at 1:48 PM, b...@lysator.liu.se wrote:
Hi Chris,
The documentation I have says pin 6 is N/C but it looks like there
is a
way to extract a usable PPS but I think I'm going to need and LC
filter,
some op amps and a one-shot and a TTL level driver. My guess
suspect
you may not be able to get both; 10MHz and 1pps.
Bob
- Original Message -
From: beale be...@bealecorner.com
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Thursday, January 05, 2012 12:46 PM
Subject: Re: [time-nuts]FE-5680A performance - 1 PPS
On Thu, Jan 5, 2012 at 8:45 PM, Robert Benward rbenw...@verizon.net wrote:
You've had more progress than I did, I don't get anything out of pin 6. I
did see the levels toggle, but that was about it. On various websites I
read to get exactly 1pps, you need a programmable 5680 because it needs
