Unfortunately, I don't have a DSO, and I don't see any way to capture waveforms
with the equipment I have available to me. And then there's the insurmountable
problem of not having access to the 120pf cap in the PIC. I may have to just
accept it without understanding it. At least success is a
Charge injection could well account for the offset from the expected
minimum.
There are no forward biased diodes in your circuit.
It would be helpful to capture the 125 buffer input signal waveforms
(and if possible the timing capacitor waveform) rather than trying to
infer whats going on from
Wouldn't those types of problems tend to make the result worse in some obvious
way, instead of better than expected? I'm getting an ADC swing from about .7V
to about 2.4V; which corresponds to the usual diode sink at .7V and probably
just blind luck with the 2.4V max being so close to the 2.5V
The single oven HP10811's heater supply is spec 20 to 30V, (=>18V is mostly
OK, 19V is better)
The Inner oven voltage spec on the Dual Oven 10811s that I have is 12 to
30Volts, (All work good down to ~11V)
Internally my dual oven units use a 5V ref in their heater controller
instead of a 10V
Metastability in the Flipflops?
Charge injection when tristating tristate buffers?
Neither of which are included in your models.
Bruce
Bob Stewart wrote:
Fellow Timenuts:
I'm trying to square reality with the modeling that I did, and nothing makes
sense. When I modeled the result of just m
Hi Chris,
I don't think it's a software issue, as the voltage doubled when I halved the
VRef - which is what would be expected. Also, the voltages tracked the 5334B
when I still had it connected, except that the TIC seems more precise and less
noisy. Then again, the 5334B was being fed with 8
On Mon, Mar 10, 2014 at 12:12 PM, Bob Stewart wrote:
> A range of 0.715V-2.38V is totally outside my expectations. The only way I
> can get close to these values is if the internal CHOLD in the PIC is only a
> fraction of the 120pf they say it has - say 20pf. Any thoughts would be
> apprecia
Thanks to TVB for hosting this manual containing info for most models of the
venerable 10811.
http://www.leapsecond.com/museum/10811a/10811a.pdf
Thomas Knox
> To: time-nuts@febo.com
> From: johncr...@aol.com
> Date: Mon, 10 Mar 2014 14:17:58 -0400
> Subject: [time-nuts] HP 10811 - 60165 Info
1 - BRN Oscillator Return (Com)
2 - RED Oscillator Power (+12V)
3 - ORG Oven Monitor Return (Com)
4 - YEL Oven Monitor Output
5 - GRN Oven Power (+18-24V)
6 - BLU Oven Return (Com)
Thomas Knox
> To: time-nuts@febo.com
> From: johncr...@aol.com
> Date: Mon, 10 Mar 2014 14:17:58 -0400
> Subject:
b...@evoria.net said:
> A range of 0.715V-2.38V is totally outside my expectations. The only way I
> can get close to these values is if the internal CHOLD in the PIC is only a
> fraction of the 120pf they say it has - say 20pf. Any thoughts would be
> appreciated.
My quick guess is a problem
Fellow Timenuts:
I'm trying to square reality with the modeling that I did, and nothing makes
sense. When I modeled the result of just my 2.4K resistor with the caps and
resistor the PIC datasheet says it has in it, there's no relationship. The
model says
I'll get millivolts out. Here's ho
I have acquired one of these double oven oscillators. Seems like a useful
thing. Need info on pin outs, and operating voltages. Also any other useful
information or links to same would be appreciated. Please reply off list with
any files of specs etc to my email - johncr...@aol.com
All help app
A while a go i bought some low phase noise Crystek CVHD-950 and now I want
to meas the phase noise of the oscillators.
Is it best to try to impedance match the output signal and filter and
amplify the hcmos before i feed it in to the phase detector? or Just hope
that the signal is high enough to dr
It's part No 05370-20206, no longer available from Agilent. I don't think you
will find one easily. Best bet is to buy some plastic and make one. The
"proper" plastic filter material is polarised to increase contrast but thin red
acrylic sheet will do OK. masking the annciators may be tricky. Tr
Hi
I’ve played with both the 6 db loss resistive splitters and the transformer
based 3 db loss splitters. They both seem to be fine for splitting precision 10
MHz signals. For a while I avoided the transformer based parts, but not for any
reason I could prove.
Bob
On Mar 10, 2014, at 7:41 AM,
Even if the -3dB were an issue, I'd have much more faith in a clear, passive
resistor network than in a complex amplifier with all it's unknown non linear
characteristics, temperature dependent time delays, noise sources, etc., etc.
This simple home made network is a useful, manageable gadget.
Volk
Hi
If you watch long enough and know the clock frequency, you will find
corrections over the entire period of the clock. In most modules that shows up
as a +/- 1/2 clock period correction.
Bob
On Mar 10, 2014, at 2:03 AM, Hal Murray wrote:
>
> albertson.ch...@gmail.com said:
>> The M12 user
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