Once upon a time, I looked into the front ends of the 5370 counters (mostly
5370A) and found that it was practical to build a replacement using modern
chips. I then lost interest in the project when I found an Ebay seller with
a lot of 10 pieces of the 5370A chip for dirt cheap (sorry, all
There was an informative thread back in 2005 on the topic of hp 5370A
vs. 5370B:
https://www.febo.com/pipermail/time-nuts/2005-April/018053.html
It's worth reading the entire thread, or at least, read the reply by JJ
(from Agilent T):
Hi,
If you sample continously and decimate the data properly you avoid the
dead-time issues and get results which is translates well into ADEV
measures.
Cheers,
Magnus
On 2019-07-30 14:30, Bob kb8tq wrote:
> Hi
>
> The 8405 is a fine device and with working probes can be very useful to have
>
Yes, I noticed there was an instructions on setting the range of OCXO's high
and low, so it falls within "correctable" range of the PLL. I bet many GPSDO
has something like this - just not explained so explicitly in manuals.
Can we try sending the .exe again? I think if you zip up the below
I have an 8405, fortunately in excellent condition, along with the BNC adapters,
the resistive splitter and the 50-ohm line samplers. The probe tips are very
delicate and are probably unobtainium these days. The electronics in the probes
can be repaired. I've been careful with mine and had
Hi
The 8405 is a fine device and with working probes can be very useful to have
around. Without the
probes .. not so much. Since they have been around since the 1960’s, the probes
may have seen
quite a bit of wear and tear.
For comparing standards, an RPD-1 and a DVM will kind of / sort of do
Hi Perrier,
The HP8405A is an analog vector analyzer that allows you to make phase
measurements like the oscilloscope with Lissajous shapes. This method is the
simplest one but allows quite approximate measurements and does not give you a
complete view of stability (Allan Deviation).
Yo Bubba Dudes!,
I've been following the discussion of the FSA3011 with great interest.
Now I'm not in the upper levels of TN esoteric knowledge or have a burning
desire to ever get there. After seeing some small reference somewhere I
looked at the HP 8405A on ebay and the price range seemed
