开云体育

Greetings,

I am trying to revive a board layout and schematic capture package I got from Omation in Dallas about 15 years ago. I would very much like to find copies of the floppys the package came in and the manuals. I have the dongle but no manuals.

All I have is a backup copy that ran on a 486 dos system. It nearly works but has issues with paths. The backup was from D: drive and I have very limited success with on C:.

When I first looked at Schema, they sent me a demo with a tutorial manual. If I could find that, it would be a great help.

I would also like to find someone still using schema. It has been over ten years since I used it and I don't remember how to do library work.

Jerry

Before I start to work on the faulty SA plug-in, I am trying to
determine if my 182T display is functioning correctly.
With the plug-in out I am feeding an external input with the -10V
square wave from the calibration output. I am able to get 10
division markers as described in the manual. The only problem these
markers are not horizontally aligned. I replaced square wave with
the 0 to -10V sine wave and now I am getting 10 division horizontal
trace which is perfectly horizontal and strait for the first 6
division and then is having a couple bumps about 1 division high.
Another thing I noticed, when I vary the intensity the trace moves
slightly up and down. Otherwise the intensity works correctly. It
would nice to have another unit to compare.

I tested the CRT with the SENCORE CR70 analyzer and it appears to
have an excellent emission, not a surprise because the trace is very
bright and sharp. The power supply is good too.

Have I got a faulty CRT or I should look for an electronic fault? I
am not very experience in this area. Any help is much appreciated.
Andrew

Looking for pdf file HP part nr is 70700-90003

Many thanks,
Erik

Hello,
Looking for pdf file USER manual 70700A digitiser
HP part nr unknown
it is NOT 70700-90001 initialisation and configuration
it is NOT 70700-90021 programming

I looked at HP site and Teknet they both mention user manual
but actually point to the 70700-90001 which is not a user manual.

Any help much appreciated,
Erik

I just got one and it seems to work but much is more advanced and
complex than the RF spectrum analyzers I'm used to. I've downloaded
the ops manual from the Agilent site but it assumes that I know more
than I do. I'm looking for more basic info, app notes or tutorial or
would like to telephone someone who has used them in the past. I want
to study the harmonics of plucked guitar strings and see how the
various manufacutrers compare.
Thanks
Hank WD5JFR

Looking for a source for the SERVICE manuals for the 5071A and Z3801A

Will purchase, rent or borrow ( to copy) and return. Tried the usual suspects ( yourmanualsource and manualsplus) no joy, they have operator and programmer manuals but no SERVICE

Any leads appreciated

Dave
NR1DX/0

Hello,

HP 5300A Measurement System Operating And Service
Manual. Revised March 1973. $20.00 shipped.

PayPal (preferred), or Bank Check/USPS Money Order.

Thank you,

Bruce WA8TNC

Can anybody point me to the site I could download 182T service manual.
I found 182C on BAMA. Is this manual close enough to work on 182T?
Is there a way of testing 182T display without any plug-in? It came
with badly damaged 8558B SA. The front panel got smashed. The LCD
display still works and I have the calibrator out but I don't know if
there is any output to the display.
Andrew

Does Anyone have Operating or Service Manuals for the Hp 431b Power
Meter and Hp 8402b Power Meter Calibrator, or know of a sourse.
Thanks
Rod.
VE5RMK

Hello everybody:

Has anybody ever fixed the IF section of a HP 3585A.... mine fails to
calibrate when the RBW is in the 10 and 3 Hz settings. I suspect the
problem is in one of the crystal filter and/ or amplifier section but I
have not been able to isolate the problem.

Any help is appreciated...

John,

I definitely concur that making changes to the loop filter is the riskiest
approach. If the loop tunes the YTO only through the FM coil and not through
a combination of FM and main coil, then compensating for too much FM coil
sensitivity is probably best done in the FM coil driver. FM coils typically
have less than one ohm DC resistance, so it would take a low value resistor
to shunt it. Usually there is a single resistor in the FM driver that sets
its gain or there is a resistor in series with the FM coil that sets the
overall sensitivity of the FM coil and its coil driver. This series resistor
is a whole lot greater than the FM coil resistance so it pretty much sets
the TC of the combination. Besides, as you point out, the loop can take care
of any residual temperature related errors. I wish I had a copy of that
portion of the schematic so I could be a little more definitive.

Good luck,

Bob Dildine
W6SFH


________________________________

From: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...] On Behalf Of John Miles
Sent: Thursday, November 23, 2006 13:18
To: hp_agilent_equipment@...
Subject: RE: [hp_agilent_equipment] HP8568B



Some good points there. My thinking was that the loop was probably
not
pretuned at all, or it would not have locked up properly with the
incorrect
coil-sensitivity figure. But checking with the 8568 manual, it
appears they
do pretune the main coil with a DAC to make sure it locks to the
expected
20-MHz comb tooth.

That suggests that any sensitivity discrepancy is limited to the FM
coil,
rather than the main coil. Not surprising, since main-coil
sensitivity
seems to be 20 MHz/mA in many YTOs. Any temperature-related errors
introduced by shunt resistance across the FM coil should be
corrected by the
PLL without difficulty.

At any rate, the objection I have to altering the loop filter is
that it's
very hard to be sure you're not causing harm elsewhere. To make the
original PLL circuit work seamlessly with a different YIG, you need
to
change the loop gain without altering its bandwidth, which can be
tricky
considering that the gain and bandwidth normally changes over the
tuning
range and, often, during the acquisition process itself.

Conversely, to fool the PLL into thinking it's controlling the old
YTO, you
only have to change one parameter, the YTO's tuning sensitivity. If
you're
lucky enough to have a more-sensitive YTO, adding shunt resistance
across
the (non-pretuned) FM coil seems relatively safe...

-- john, KE5FX

Some good points there. My thinking was that the loop was probably not
pretuned at all, or it would not have locked up properly with the incorrect
coil-sensitivity figure. But checking with the 8568 manual, it appears they
do pretune the main coil with a DAC to make sure it locks to the expected
20-MHz comb tooth.

That suggests that any sensitivity discrepancy is limited to the FM coil,
rather than the main coil. Not surprising, since main-coil sensitivity
seems to be 20 MHz/mA in many YTOs. Any temperature-related errors
introduced by shunt resistance across the FM coil should be corrected by the
PLL without difficulty.

At any rate, the objection I have to altering the loop filter is that it's
very hard to be sure you're not causing harm elsewhere. To make the
original PLL circuit work seamlessly with a different YIG, you need to
change the loop gain without altering its bandwidth, which can be tricky
considering that the gain and bandwidth normally changes over the tuning
range and, often, during the acquisition process itself.

Conversely, to fool the PLL into thinking it's controlling the old YTO, you
only have to change one parameter, the YTO's tuning sensitivity. If you're
lucky enough to have a more-sensitive YTO, adding shunt resistance across
the (non-pretuned) FM coil seems relatively safe...

-- john, KE5FX

Gentlemen,

Trying to adjust loop bandwidth by shunting the YTO tuning coil(s) with a
resistance might not be a very good idea. I'm not familiar with YTO coil
drivers in the HP 8568B, but I designed the main coil and FM coil drivers in
the HP 8672A synthesizer which preceded the 8568 by a few years. All the HP
microwave instruments of that period used variations of the same YTO design.
The main coil driver needs to be as close to an ideal current source as
possible, as it is the current through the coil that controls the YTO
frequency. The temperature coefficient of the copper wire in the coil is
very high (I seem to recall it's on the order of 4000 ppm/C and quite
variable, but I'm not sure). Any resistance across the coil acts as a
current divider with very poor TC and will lead to pre-tuning errors that
are a function of temperature, so can't be adjusted out.

Again, I'm not familiar with the HP 8568 phase locked loop, but in most
designs, the loop locks the YTO via the FM coil. Often the DC portion of the
loop's error voltage is routed to the main tuning coil via a simple
cross-over network (similar to the cross-over network in hi-fi speakers) and
the high frequency portion (above a hundred hertz or so) is routed to the FM
coil. The gain through both paths is adjusted so the loop sees a constant
YTO tuning sensitivity vs. the frequency of the tuning voltage. I don't know
if this was done on the 8568, but you should be able to figure out just what
the original designers did by examining the circuit schematics in the area
from the loop integrator though the YTO coil drivers.

If you need to adjust the loop gain to compensate for the tuning sensitivity
of a different YTO, it would be probably be best to do it in the YTO coil
drivers or in the loop integrator. But I recommend first doing a complete
analysis of the circuits involved so you understand how they are supposed to
behave and so you don't change the overall behavior. Designing a phase
locked loop for low phase noise and good frequency agility is not a trivial
task. I also recommend documenting any circuit changes (maybe paste them
inside one of the instrument's covers?) so the next guy knows what you did.

Maybe someone closer to the original 8568 design can make more specific
comments.

Regards,

Bob Dildine

________________________________

From: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...] On Behalf Of Chris Bartram
Sent: Tuesday, November 21, 2006 06:41
To: hp_agilent_equipment@...
Subject: [hp_agilent_equipment] HP8568B



John

> Glad to hear you made some progress. Sounds like the replacement
YTO was
> too sensitive (degraded phase margin and increase in loop BW due
to
> increase in overall loop gain), correct? I wonder if the best way
to fix
> that would be a shunt resistance across the tuning coil. There's a
lot to
> be said for not altering the loop filter itself, if possible. It
has to
> work over a rather-wide range of conditions as the analyzer sweeps
across
> the band.

Thanks for that thought. I can't argue with your logic! I'll try it
when I
next summon-up the physical strength to lift the analyser off the
shelf where
it lives!

FWIW I did look for a change in loop performance, using the shape of
the noise
pedestal across the tuning range of the analyser, and it seemed
pretty
consistent at both of the band edges and at its centre. I didn't
have the
time or energy to look at the loop using more formal methods...

Vy 73

Chris
GW4DGU

Dave

There are scattered reports that LOGSA is closed to certain foreign
IP addresses. I can email you the files from the LOGSA site but they
are not particularly useful in this case

Dave
73 de NR1DX/0

Also, there is brief user guide at this site:

LOGSA unfriendly? Untrue, it's really quite user-friendly - just like
a Marine Drill Sargeant shouting orders in your face!

I could only find parts list and some calibration manuals on the site,
but no schematics. Here's a little navigational help:

1. Drop down and give me 20 push-ups to prepare yourself for entering
the website

2. Go to the website:

3. Click the "I accept" button near the bottom of the display.

4. Click the "Enter the Site" selection on the left side of the display.

5. Type: "Standing Wave" in the "Pub Title Text" box and press the
"Search" button to find these four documents:

* STANDING WAVE RATIO METER, HEWLETT-PACKARD MODEL Y10-415E (NSN
6625-00-815-6273)

* CALIBRATION PROCEDURE FOR STANDING WAVE RATIO METER, HEWLETT-PACKARD
MODELS 415E AND PRD MODEL 277D

* CALIBRATION PROCEDURE FOR STANDING WAVE RATIO METERS, HEWLETT-P
MODELS 415A (AN/USM-37 AND IM-97/U), 415B, 415BR AND 415D (IM-1 AND
GENERAL MICROWAVE MODEL 351 (IM-175/U, IM-175A/U AND IM-175

* INDICATORS, STANDING WAVE RATIO IM-175/U (NSN 6625-00-892-5670) AND
IM-175B/U (6625-00-892-5670)

6. Click on each document to retrieve the respective ".pdf file"

7. Study each manual until you can disassemble your SWR meter down to
the component level and then reassemble it - WHILE BLINDFOLDED!

Happy Thanksgiving to Everyone!!!

Fellow techies (or 'Tekkies' in the case of the Tektronix group) ;-)

This is to advise all users of Blue Feather Tech's FTP archive that I have made an administrative change in the server which will help me to better discriminate abuse of the archive from legitimate requests, but that will also affect those attempting to log in.

'Abuse' in this context is defined as multiple sequential login attempts by an automated script, done exclusively for the purpose of seeking vulnerabilities in the target server. These attempts create such a high "noise" level in the logs, given today's prevalence of network abusers, that it makes them very bulky and difficult to parse.

What I have done, specifically, is changed the default port that the FTP daemon listens on. Whereas a standard FTP setup will listen for connections on Port 21, Blue Feather's has been reconfigured to listen on Port 50021.

WHAT THIS MEANS: Whatever program you use for your FTP client must now specify the new port explicitly when connecting to us. The login process has not changed -- Only the port number that the server listens on. A good analogy would be someone who changes their phone number after getting a whole ton of annoying calls.

EXAMPLE: If you use a command-line based FTP utility, you probably typed something like this to get to us in times past.

ftp ftp.bluefeathertech.com

This will no longer work. You would now have to type:

ftp ftp.bluefeathertech.com 50021

...Which tells your FTP client to use the new port instead of the default 21.

IF YOU USE A WEB BROWSER: You will need to type the following into the URL bar...

ftp.bluefeathertech.com:50021

This tells your browser to use the new port instead of the default.

If you use a client program such as WS_FTP, or some other third-party package, please consult its documentation for information on how to address a specific port on a given host system.

I will also post a note about this to my web site.

Thanks in advance for your understanding and patience.




-=-=-=-=-=-=-=-=-=-=-=-
Bruce Lane, Owner & Head Hardware Heavy,
Blue Feather Technologies --
kyrrin (at) bluefeathertech do/t c=o=m
"If Salvador Dali had owned a computer, would it have been equipped with surreal ports?"

Thanks Dave - as you may have gathered from my earlier response, I have given up on LOGSA - it takes the prize for the most unfriendly and incommunicative navigation system I have ever come across - but then this may just be to deter non-military users!

Cheers,
Dave

Dave

There are some US Army manuals out on LOGSA but as I recall they have
no Schematics, just calibration info and parts lists

Dave

By the way everyone I just upgraded to Internet Explorer 7 (which I
like a lot ..faster for sure) anyway IE-7 and Logsa have a "security
certificate" incompatibility problem which according to the popup I
got they (?) are working on.. so until that gets fixed dont upgrade
to IE-7 if you surf LOGSA a lot