In message <4daa7be5.5060...@sfr.fr>, cook michael writes:
>Le 17/04/2011 00:20, beale a =E9crit :
>> The application note merely asserts the possibility, but neglects to
>present a specific design. Has anyone here attempted to use a PIC CTMU
>in that way?
I tried it when I had a pic18f25j50 in
beale wrote:
I see Microchip application note AN1375 at
http://ww1.microchip.com/downloads/en/AppNotes/01375a.pdf suggests that the
CTMU module included in some recent PIC parts, for example PIC18F46J11 can be
used as a TIC building block for interpolating time intervals with sub-ns
resolutio
Le 17/04/2011 00:20, beale a écrit :
The application note merely asserts the possibility, but neglects to present a
specific design. Has anyone here attempted to use a PIC CTMU in that way?
The app note doesn't give a complete design, but the principle of
precision time measurement is explained
I suspect this was an inadvertent mis-post to time-nuts intended for
volt-nuts
On 4/16/2011 4:01 PM, WB6BNQ wrote:
> JF,
>
> Not meaning to be unfriendly, BUT this list * * IS NOT * * a "general" test
> equipment repair faculty.
>
> The unit in question is a series of regulated voltage sources
Rick Karlquist wrote:
FWIW:
The guts of a BNC/TNC is very similar if not identical to a type N,
which is good for at least 12.4 GHz. The Agilent 13 GHz scopes
have "precision" (IE tight fitting) BNC connectors on the probes.
All of which of course doesn't mean the Asian BNC's you bought
at the
Oz-in-DFW wrote:
>
> BNCs can be as good as TNCs when properly applied, but the bayonet
> mechanism allows too much mechanical alignment play for reasonable
> reliability past a GHz or so. If they are properly installed and the
> cable is not allowed to put a radial or significant tensile load the
An Amphenol document discussing the mating compatibility of their 50-ohm
and 75-ohm BNC connectors can be found here
_http://www.amphenolrf.com/products/bnc.asp?N=0&sid=46B11E806D75617F_
(http://www.amphenolrf.com/products/bnc.asp?N=0&sid=46B11E806D75617F) .
Bruce, KG6OJI
_
HP made a point of telling users that the 75 ohm female BNC connectors used
on HP equipment were fully and safely mate-able with standard male 50 ohm
parts. This has been so certainly from the 1970's. Casual inspection of
the part shows that it uses the identical center pin set as the 50 ohm
par
On 4/16/2011 2:59 PM, shali...@gmail.com wrote:
> As pointed out earlier (by Bruce and others), there is a vast quantity of 75
> ohm BNC connectors which mate perfectly with 50 ohm BNC sockets (save for
> impedance mismatch). I have a set of 10 cables bought off the *bay with such
> connectors
You also have to wonder why cable was able to get their own HDTV standard.
I did a bit of video design in the day. I was told SECAM was such a mess that
the studios did everything in PAL and converted to SECAM for transmission.
Also, NTSC was never a standard. It was issued as a bulletin, a le
John wrote:
IMO, your crack about NTSC is unjustified.
IMO, NTSC color was a very elegant engineering solution to backwards
compatability. Without that, we could well be still watching B&W.
The other contemporary backward-compatible solutions -- PAL and SECAM
-- did not suffer from the color
I see Microchip application note AN1375 at
http://ww1.microchip.com/downloads/en/AppNotes/01375a.pdf suggests that the
CTMU module included in some recent PIC parts, for example PIC18F46J11 can be
used as a TIC building block for interpolating time intervals with sub-ns
resolution. I gather thi
JF,
Not meaning to be unfriendly, BUT this list * * IS NOT * * a "general" test
equipment repair faculty.
The unit in question is a series of regulated voltage sources that are
adjustable. Being adjustable means it is not absolute. Equally so, your 3458A
is, likewise, adjustable and is tot
Bruce Griffiths wrote:
Oz-in-DFW wrote:
On 4/9/2011 11:29 AM, Greg Broburg wrote:
I expect that I am missing something obvious here
a little nudge may help.
Regards;
Greg
What you are missing is that the concept only applies to small integer
(2 or 3) division ratios and won't work as spe
As pointed out earlier (by Bruce and others), there is a vast quantity of 75
ohm BNC connectors which mate perfectly with 50 ohm BNC sockets (save for
impedance mismatch). I have a set of 10 cables bought off the *bay with such
connectors. These cables are 75 ohm, so there will be a mismatch in
Oz-in-DFW wrote:
On 4/9/2011 11:29 AM, Greg Broburg wrote:
I expect that I am missing something obvious here
a little nudge may help.
Regards;
Greg
What you are missing is that the concept only applies to small integer
(2 or 3) division ratios and won't work as speculated here.
On 4/9/2011 11:29 AM, Greg Broburg wrote:
>
>
> I expect that I am missing something obvious here
> a little nudge may help.
>
> Regards;
>
> Greg
>
What you are missing is that the concept only applies to small integer
(2 or 3) division ratios and won't work as speculated here. It's sort
of (l
No Stan, you are correct.
**True** 75 ohm BNCs (and Ns and TNCs as well) use a substantially
smaller center pin and no insulation support around the female contacts.
Mating a 50 ohm spec male part (plug) will invariably damage a 75 ohm
female (receptacle.)
Amphenol made a **proprietary** series
To answer my own question... it's a ROHS lead-free device that contains lead!
--
What will they think of next?
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To unsubscribe, go to https://www.febo.
The chip has 8 NC - No Connect pins... that must be connected to GND. What
will they think of next?
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To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listin
Peripherally relevant to the recent discussion about accurate wristwatches
I want to point out an interesting chip: Dallas/Maxim DS3231
This is a CMOS clock with built in 32.768 kHz X-tal and a couple of
neat tricks:
Every 64 seconds, it measures the temperature, and adjust the capacitive
loadi
I am looking for the service manual of the Datron Wavetek 4910. I have just
got this reference standard from Ebay : is it normal to see 3 cells at 2 or 3
µv under 10V and one at + 13µv (23°C with 3458A just calibrated yesterday) or
it is an obvious problem with the cell (the third one) ? What
IMO, your crack about NTSC is unjustified. In the 1950s, TV and
electronics was in it's infancy. No transistors, no ICs, and a large base
of installed, expensive sets. A TV set cost about as much as a car!
IMO, NTSC color was a very elegant engineering solution to backwards
compatability. Without
Just a follow-up for others that may run into this someday
I took apart the PRS10 and disassembled the lamp assembly, Not easy..
I discovered that the MRF134 in there was still functional but that
there was a second short that was preventing oscillation, this looked to
be due to solder reflowing
On 04/16/2011 06:17 AM, Charles P. Steinmetz wrote:
Magnus wrote:
But have you gone SFN? That would compact the frequency needs such
that LTE style broadband could be done in UHF instead of breaking up
the GPS signal.
See above -- the FCC already intends to repurpose the UHF TV spectrum
for w
Hi all,
I have a Trak Microwave 8810 station clock and I'm looking for the operator manual, in particular appendix E to adjust the
default DAC voltage. I tried Trak but they were not able to help too much. They sent me a manual extract for an 8812 but the
serial port commands to set the DAC don'
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