Yeah... I got the model number wrong. I meant the 3403. Digtal, true RMS.
I used it for Y Factor measurements at IF before getting an AIL 2075.
Oops.
-John
=
> Well John,
>
> Neither do you with regard to the hp-3400A RMS voltneter. It is spec'd to
> only
> 10 MHz ! From 50Hz to 1
Well John,
Neither do you with regard to the hp-3400A RMS voltneter. It is spec'd to only
10 MHz ! From 50Hz to 1 MHz it is +/-1% and at 10 MHz it is rated at +/-5%. So
at 10 MHz it is no better then the spec of Bird 43 slug type power meter (if you
believe them).
The old hp-434 Colorimetric p
> At 08:30 PM 12/1/2009, J. Forster wrote...
>>In fact, on the Tek 7704 or 7704A (I forget which) there were "No
>>Cost"
>>options of maximally flat frequency response OR best pulse response.
>>OR!
>
> Sure, if you're using a 150 MHz to try and measure accurately at 100
> MHz, you're not going to g
Mike S,
What you say about my needs is essentially correct. For ham radio
purposes, my Bird dummy load and Tek scope will give me what I need.
However, being interested in measuring things to greater accuracy than
I really need (aren't we all?), the other responses were also
appreciated. I was cur
At 08:30 PM 12/1/2009, J. Forster wrote...
In fact, on the Tek 7704 or 7704A (I forget which) there were "No
Cost"
options of maximally flat frequency response OR best pulse response.
OR!
Sure, if you're using a 150 MHz to try and measure accurately at 100
MHz, you're not going to get absolut
My boss at Tektronix, Bob Ragsdale, quoted the "Pulse Amplifier Designer's
Law," which he said he learned at the Rad Lab in Livermore:
"If it's big enough, it's too slow.
If it's fast enough, it's too small.
If it's big enough and fast enough, its got rumdiddlies on the top."
Best,
Dick Moore
>
time-nuts-boun...@febo.com wrote on 12/01/2009 07:00:21 PM:
> From:
>
> "J. Forster"
>
> To:
>
> "Discussion of precise time and frequency measurement" n...@febo.com>
>
> Date:
>
> 12/01/2009 07:10 PM
>
> Subject:
>
> Re: [time-nuts] OT: Power level reference
>
> Sent by:
>
> time-nuts-
Hi
Boonton has made power meters (RF milivolt meters to be more precise) for a
long time. They also make a calibrator for them.
If you tear into the calibrator, it's a very simple gizmo. They take the output
of a buffered logic gate and feed it into a big low pass filter. A few
resistors / pad
I do. Very well, in fact. Unless you have swept a scope with a very well
leveled sine generator, you are only guessing it is flat.
That's WHY Tektronix sells BOTH fast rise Pulse Generators and Leveled
Sine Generators.
In fact, on the Tek 7704 or 7704A (I forget which) there were "No Cost"
optio
At 07:00 PM 12/1/2009, J. Forster wrote...
Scopes tend to have non-flat frequency response. I'd consider a
precision
load and something like an HP 3400A True RMS meter for up to a hunderd
MHz
or so.
You have to know your equipment. I have a Tek 485 350 MHz analog scope,
so I'm confident it's
I'm not ready for "power nuts" yet, but thanks to all for the
suggestions. I was considering the o'scope method, but thought I'd see
what others had to say. It's always interesting to see how different
people tackle a problem.
Joe Gray
KA5ZEC
On Tue, Dec 1, 2009 at 5:00 PM, J. Forster wrote:
> S
Scopes tend to have non-flat frequency response. I'd consider a precision
load and something like an HP 3400A True RMS meter for up to a hunderd MHz
or so.
Above 10 MHz the HP 432A would be my choice.
FWIW,
-John
===
> At 11:41 PM 11/30/2009, Joseph Gray wrote...
>>We all have our
Subject says it all,
Thanks for the interest and the help clearing out some old projects.
Stan, W1LE
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David Pritchard wrote:
Hi,
I am trying to add DGPS capability to an older Rockwell Jupiter GPS
module. I have a known good DGPS receiver and have tried to interface it
to the Jupiter via Serial Port 2 (pin #15). So far, I have had no luck
making it work. I'm wondering whether I need to "tell"
Hi Stanley:
That sure looks like it.
Thanks& Have Fun,
Brooke Clarke
http://www.PRC68.com
Stanley Reynolds wrote:
- Original Message
From: Stanley Reynolds
To: Discussion of precise time and frequency measurement
Sent: Tue, December 1, 2009 3:29:42 PM
Subject: Re: [time-nuts] Tr
Hello The Net:
Excess to my needs is a older Sulzer Labs, Frequency Standard, Tracor
Inc, LA
model 5C, serial no. 733 with companion cylindrical power supply.
Does not work. But has tremendous potential as your project for the New Year
A great stocking stuffer for the double oven nut or the
Hi,
I am trying to add DGPS capability to an older Rockwell Jupiter GPS
module. I have a known good DGPS receiver and have tried to interface it
to the Jupiter via Serial Port 2 (pin #15). So far, I have had no luck
making it work. I'm wondering whether I need to "tell" the Jupiter that
I hav
Looking at one a have from a different source ,
Shield outside 48000-35 , INSIDE BACK SHIELD 45545-C
PC board 46999-00-G2
KALEX3 K688
main chip Epson SS10A6 FD7420235 (32.768K OX)
Stanley
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Subject says it all.
I hope everyone is having the best of this holiday season.
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- Original Message
From: Stanley Reynolds
To: Discussion of precise time and frequency measurement
Sent: Tue, December 1, 2009 3:29:42 PM
Subject: Re: [time-nuts] Trimble 48000 series GPS receiver?
- Original Message
From: Brooke Clarke
To: "time-nuts@febo.com >> Discu
- Original Message
From: Brooke Clarke
To: "time-nuts@febo.com >> Discussion of precise time and frequency
measurement"
Sent: Tue, December 1, 2009 1:06:13 PM
Subject: [time-nuts] Trimble 48000 series GPS receiver?
Hi:
These are showing up on eBay (seller : **fluke.l*)*
http://cgi
I have the data sheet here:
http://www.febo.com/pages/oscillators/100_MHz_Data_Sheets/
John
Corby Dawson wrote:
I bought a couple Bliley 100Mhz oscillators about a year ago, part #
NV26R891.
Now that I want to use them I can't find the pinout to identify which
pins are the EFC and power
I bought a couple Bliley 100Mhz oscillators about a year ago, part #
NV26R891.
Now that I want to use them I can't find the pinout to identify which
pins are the EFC and power.
Can anyone help?
Thanks,
Corby Dawson
Water Heater
Some l
At 21.00 01/12/2009, you wrote:
I was sitting a couple of feet from the Z3801 when I got a whiff of a very
funky smell. Though my sense of smell is very poor, I sniffed around until I
determined it is coming from the Z3801. It seems to be working OK. I haven't
lifted the lid yet. I know there are
I was sitting a couple of feet from the Z3801 when I got a whiff of a very
funky smell. Though my sense of smell is very poor, I sniffed around until I
determined it is coming from the Z3801. It seems to be working OK. I haven't
lifted the lid yet. I know there are 3801 gurus here so, is this somet
John,
it might easily happen ;)
Even the HP 434A that was introduced 50 years ago appears to be still in
use by some power nuts:
http://www.electricspacecraft.com/pitfalls%20for%20web.pdf
Adrian
J. Forster schrieb:
How accurately do you NEED to measure power? Is this the start of a new
Gro
At 11:41 PM 11/30/2009, Joseph Gray wrote...
We all have our various highly accurate frequency and perhaps time
references. Is there a relatively simple and inexpensive method of
making an accurate RF power level reference?
Joe Gray
KA5ZEC
Since you're a ham, I'll assume you're primarily concer
How accurately do you NEED to measure power? Is this the start of a new
Group... Power Nuts?
The 432A / 478A / 8477A and a good DMM is waaay good enough for ANY real
engineering use.
-John
==
> and... I forgot to mention the Rohde & Schwarz NRS that goes from DC to
> 15 GH
Hi:
These are showing up on eBay (seller : **fluke.l*)*
http://cgi.ebay.com/trimble-48000-00-gps-receiver_W0QQitemZ290301113595
http://www.prc68.com/I/Trimpack.shtml#48000
Is there any info about them?
--
Have Fun,
Brooke Clarke
http://www.PRC68.com
_
and... I forgot to mention the Rohde & Schwarz NRS that goes from DC to
15 GHz.
The maximum accuracy method (advanced substitution method - using a
standard cell) described in the manual is probably what you're looking for.
Btw. mine has all three available heads for 50, 60 and 75 ohms. I've
bee
To all interested in this matter.
There is an excellent application note on power measurement available on
Agilents web site.
http://cp.literature.agilent.com/litweb/pdf/5989-6255EN.pdf
Fundamentals of RF and Microwave Power Measurements
Another outstanding application note can be found on Rohde a
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Hello Joe,
I haver not gotten overly concerned with measuring power levels.
I do have a pair of HP-432 power meters on the bench and I periodically
do a comparison.
With their sensors they are spec'd for about 1% accuracy.
With a Bird 43 I believe the accuracy is 10% of full scale, a bit coar
Joe,
the HP 434A calorimetric power meter does the trick as it works from DC
to 12.4 GHz.
And, it measures 10 mW to 10 W full scale.
http://www.hpmemory.org/wa_pages/wall_a_page_10.htm
Just scroll 2/3 down.
Adrian
Joseph Gray schrieb:
We all have our various highly accurate frequency and pe
Yes, do a factory reset. The tbolt uses the oscillator to track the gps
satellites. If you managed to set the oscillator params wrong, it can't track
the sats.
I am surprised that it is showing SV numbers. That indicates that it is seeing
some gps signals (or possibly using a very old
There was a special issue of IEEE proceedings about 30 years ago on just
this subject. I'll see if I can find the date (it's on my desk at work)
Basically, you always wind up going back to some sort of calorimetric
standard: some sort of load which you measure the temperature rise of, and
that yo
In message , Josep
h Gray writes:
>We all have our various highly accurate frequency and perhaps time
>references. Is there a relatively simple and inexpensive method of
>making an accurate RF power level reference? If so, then what do we
>calibrate it with, not already having such an accurate ref
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