Re: HP 85047A (S-param test set) with loose Port1
?
Charles,
?
One of the ports on my 8503 S param test set moved, and yes it
was the one with the plastic washers on it. It drove me mad so I simply turned
the washers upside down and tightened the screws carefully.
?
73
?
Kevin
?
?
----- Original Message -----
Sent: Saturday, October 10, 2015 10:42
AM
Subject: Re: [hp_agilent_equipment] HP
85047A (S-param test set) with loose Port1
?
|
Re: HP 85047A (S-param test set) with loose Port1
Dr. David Kirkby (Kirkby Microwave Ltd)
|
Re: HP 83592B hangs 8350B sweeper
?
Hi,
Try a burst of aerosol Contact Cleaner on the
contacts on the back of the plugin also on the mating connector inside the
mainframe.
In my experience that seems to suppress the error
messages that you have described.
It might need several iterations of the process.
The act of pushing the plugin into the mainframe will help by wiping the mating
contacts, so that should help.
Good luck
Cliff? G4BGP
?
----- Original Message -----
Sent: Saturday, October 10, 2015 2:36
AM
Subject: [hp_agilent_equipment] HP 83592B
hangs 8350B sweeper
?
My 8350B with 83592B plug-in turns on?with flickering displays
that go blank?and hangs the 8350B with no error message,?and no
response to any switches on either the plug-in or mainframe. While flickering
for a few seconds the 8350B displays show -310 MHz start and 20 GHz
stop.
It does the same to a second known working 8350B. All data and
address lines are active when hung so I don't understand why the 8350B does
not respond.
If I press CW while the displays are flickering it responds. I may
have to power down and up again to then enter a CW frequency, it comes up
showing CW. Once in this state I can run tests and all front panel entries
work. I ran all the A3 tests which show the ROMs and address decoders are
OK.
The frequency in CW is high by 13 to 47 MHz going from?50 MHz to
18 GHz (it covers 0.01 to 20 GHz).
The power is way off. The display shows -2 to +23 dBm. Is this
normal? (no opt 002 attenuator).
?-2 is actually -17 dbM?and power does not increase until
about +2.5 dBm. At +10 dbM?it is actually +9.5 dBm.
Tomorrow I will start a full calibration. Suggestions and tips would
be appreciated.
Is there a battery backed memory in the 8350B? It seems to remember
the setup for quite?a while after being turned off. Is the save-n
non-volatile?
Does anyone have a spare cover for the PCBs for sale? The plate that
goes on top of the 83592B and has many screws. it also holds the big heat sink
in place. It is obvious that someone else's fingers have been inside this
plug-in.
No virus found in this
message.
Checked by AVG -
Version: 2015.0.6140 / Virus
Database: 4435/10790 - Release Date: 10/10/15
|
HP 85047A (S-param test set) with loose Port1
Hi, A while ago I managed to acquire a? HP 85047A, unfortunately it has had an accident sometime in it's life and Port1 is loose and slightly bent. I have measured the directivity of the port and it seems to be in the right ballpark as far as performance is concerned. However the whole sensor moves. Opening up? the unit I see that whereas port2 is direct metal to metal contact where the mounting screws are located, port1 has plastic washers between the two surfaces. No matter what I try I cannot stop it moving. Anyone have any ideas? Next week I should get an HP8753E opt 011 unit and I will then be able to see if the Port1 sensor needs replacing or not.? - Charles G4GUO
|
Re: HP 83592B hangs 8350B sweeper
As an addition, you have removed your nicad battery pack, right?
The nicad pack in the 8350B main frame, when overcharged (which is always)
vents caustic fumes and they fume all over the plugin, and the main frame
board next to the battery.
They cause a nightmare of problems.
The battery is next to worthless as it is, it should be removed on sight,
and all of the mess cleaned up.
-Chuck Harris
Dave McGuire Mcguire@... [hp_agilent_equipment] wrote:
toggle quoted message
Show quoted text
I'd immediately suspect a shorted tantalum capacitor on one of the supply
lines. I had one with nearly-identical symptoms a few years ago, and that
was the cause.
-Dave
|
Re: HP 83592B hangs 8350B sweeper
Suspect A3 in your 83592B
Look at manual 83592-90074
8-57 Troubleshooting the A3 Digital Interface Assembly
Dennis
--------------------------------------------
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Show quoted text
On Fri, 10/9/15, bunge@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:
Subject: [hp_agilent_equipment] HP 83592B hangs 8350B sweeper
To: hp_agilent_equipment@...
Date: Friday, October 9, 2015, 9:36 PM
My 8350B with 83592B plug-in turns on?with
flickering displays that go blank?and hangs the 8350B
with no error message,?and no response to any switches
on either the plug-in or mainframe. While flickering for a
few seconds the 8350B displays show -310 MHz start and 20
GHz stop.
It does the same to a second known
working 8350B. All data and address lines are active when
hung so I don't understand why the 8350B does not
respond.
If I press CW while the displays are
flickering it responds. I may have to power down and up
again to then enter a CW frequency, it comes up showing CW.
Once in this state I can run tests and all front panel
entries work. I ran all the A3 tests which show the ROMs and
address decoders are OK.
The frequency in CW is high by 13 to 47
MHz going from?50 MHz to 18 GHz (it covers 0.01 to 20
GHz).
The power is way off. The display shows
-2 to +23 dBm. Is this normal? (no opt 002
attenuator).?-2 is actually -17
dbM?and power does not increase until about +2.5 dBm.
At +10 dbM?it is actually +9.5
dBm.
Tomorrow I will start a full
calibration. Suggestions and tips would be appreciated.
Is there a battery backed memory in the
8350B? It seems to remember the setup for quite?a while
after being turned off. Is the save-n
non-volatile?
Does anyone have a spare cover for the
PCBs for sale? The plate that goes on top of the 83592B and
has many screws. it also holds the big heat sink in place.
It is obvious that someone else's fingers have been
inside this plug-in.
|
Re: HP 83592B hangs 8350B sweeper
I'd immediately suspect a shorted tantalum capacitor on one of the supply lines. I had one with nearly-identical symptoms a few years ago, and that was the cause. -Dave -- Dave McGuire, AK4HZ New Kensington, PA On October 9, 2015 9:36:34 PM "bunge@... [hp_agilent_equipment]" <hp_agilent_equipment@...> wrote: My 8350B with 83592B plug-in turns on with flickering displays that go
blank and hangs the 8350B with no error message, and no response to any
switches on either the plug-in or mainframe. While flickering for a few
seconds the 8350B displays show -310 MHz start and 20 GHz stop.
It does the same to a second known working 8350B. All data and address
lines are active when hung so I don't understand why the 8350B does not
respond.
If I press CW while the displays are flickering it responds. I may have to
power down and up again to then enter a CW frequency, it comes up showing
CW. Once in this state I can run tests and all front panel entries work. I
ran all the A3 tests which show the ROMs and address decoders are OK.
The frequency in CW is high by 13 to 47 MHz going from 50 MHz to 18 GHz (it
covers 0.01 to 20 GHz).
The power is way off. The display shows -2 to +23 dBm. Is this normal? (no
opt 002 attenuator).
-2 is actually -17 dbM and power does not increase until about +2.5 dBm. At
+10 dbM it is actually +9.5 dBm.
Tomorrow I will start a full calibration. Suggestions and tips would be
appreciated.
Is there a battery backed memory in the 8350B? It seems to remember the
setup for quite a while after being turned off. Is the save-n non-volatile?
Does anyone have a spare cover for the PCBs for sale? The plate that goes
on top of the 83592B and has many screws. it also holds the big heat sink
in place. It is obvious that someone else's fingers have been inside this
plug-in.
|
HP 83592B hangs 8350B sweeper
My 8350B with 83592B plug-in turns on?with flickering displays that go blank?and hangs the 8350B with no error message,?and no response to any switches on either the plug-in or mainframe. While flickering for a few seconds the 8350B displays show -310 MHz start and 20 GHz stop.
It does the same to a second known working 8350B. All data and address lines are active when hung so I don't understand why the 8350B does not respond.
If I press CW while the displays are flickering it responds. I may have to power down and up again to then enter a CW frequency, it comes up showing CW. Once in this state I can run tests and all front panel entries work. I ran all the A3 tests which show the ROMs and address decoders are OK.
The frequency in CW is high by 13 to 47 MHz going from?50 MHz to 18 GHz (it covers 0.01 to 20 GHz).
The power is way off. The display shows -2 to +23 dBm. Is this normal? (no opt 002 attenuator). ?-2 is actually -17 dbM?and power does not increase until about +2.5 dBm. At +10 dbM?it is actually +9.5 dBm.
Tomorrow I will start a full calibration. Suggestions and tips would be appreciated. Is there a battery backed memory in the 8350B? It seems to remember the setup for quite?a while after being turned off. Is the save-n non-volatile?
Does anyone have a spare cover for the PCBs for sale? The plate that goes on top of the 83592B and has many screws. it also holds the big heat sink in place. It is obvious that someone else's fingers have been inside this plug-in.
|
In addition to what Alan writes: - have a look at the program and see if the array that V(N,2) is an element of, is declared as an integer array. If so, any fractions added to x(1,1) will be lost by equating V(N,2) to your expression. - make sure your scale factor is correctly used (you're still sending in SINT format, i.e. only a "mantissa"). Since you're at least getting the correct x(1,1) values, I guess it's ok. - I still don't understand what you're trying to achieve, especially since you're using the reciprocal of a measurement in a calculation to generate the next value, or so it seems.
Raymond
|
Re: alternatives to 54120b test set
On 10/09/2015 05:00 PM, Chris Tofu dreyfusshudson@... [hp_agilent_equipment] wrote: I think that's accurate. I've seen test sets, not saying which one
(likely the 54121a though) for around 100$. An anomaly? Perhaps, but
deals can be had. I only payed 100$ + shipping for what I got, was in
fairly good shape (though missing the top cover). The guy, seemingly a
bona fide test equipment reseller, had the voltage swtich on 220vac.
Maybe he had some kid look it over. I didn't have the heart to tell him.
Probably in his best interests though. The umbilical cable alone can run
150$. Wow, sounds like the guy had too much blood in his caffeine stream. It would be nicer to have a self contained unit like the 54110/11/12,
but the specs are so anemic by comparison. It's not the last scope I'm
going to own anyway I'm sure. Down the road I'll either splurge for the
test set and/or one of the earlier color HPs. There's always the 2215a I
payed 4$ for. Has a beam that's all I can say for now. Yeah. Just keep in mind that the 54120B is *not* a general-purpose oscilloscope. It's a pretty specialized instrument. Those NMD connectors on the test set should give that away. Hang onto that 2215A! -Dave -- Dave McGuire, AK4HZ New Kensington, PA
|
Re: alternatives to 54120b test set
?
54123a - 34 ghz
54121a - 20 ghz
54121a - 12.5 ghz <<< typo, should have been 54122a
|
Re: alternatives to 54120b test set
54123a - 34 ghz
54121a - 20 ghz
54121a - 12.5 ghz
?I think that's accurate. I've seen test sets, not saying which one (likely the 54121a though) for around 100$. An anomaly? Perhaps, but deals can be had. I only payed 100$ + shipping for what I got, was in fairly good shape (though missing the top cover). The guy, seemingly a bona fide test equipment reseller, had the voltage swtich on 220vac. Maybe he had some kid look it over. I didn't have the heart to tell him. Probably in his best interests though. The umbilical cable alone can run 150$.
?It would be nicer to have a self contained unit like the 54110/11/12, but the specs are so anemic by comparison. It's not the last scope I'm going to own anyway I'm sure. Down the road I'll either splurge for the test set and/or one of the earlier color HPs. There's always the 2215a I payed 4$ for. Has a beam that's all I can say for now.
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Re: alternatives to 54120b test set
On Fri, Oct 9, 2015 at 2:16 PM, Dennis Czelusniak <czelusniakd@...> wrote:
Looking at Block Diagram of 4 Channel Test Set for 54120 Mainframe shows it contains Horizontal (A1) and Vertical (A2) Assembly.
Where did you see a 4 Channel test set for under $100?
That's an achievable price for a 54121A. Here's one that went for $105 + ship:
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I will give that a try on Monday.? I might be able to tell the DVM to do some math too - but I think that slows down the output.
|
Re: alternatives to 54120b test set
Looking at Block Diagram of 4 Channel Test Set for 54120 Mainframe shows it contains Horizontal (A1) and Vertical (A2) Assembly.
Where did you see a 4 Channel test set for under $100?
Dennis
--------------------------------------------
toggle quoted message
Show quoted text
On Fri, 10/9/15, Chris Tofu dreyfusshudson@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:
Subject: [hp_agilent_equipment] alternatives to 54120b test set
To: "Hp_agilent_equipment" <hp_agilent_equipment@...>
Date: Friday, October 9, 2015, 2:50 PM
Hello
group, just acquired a 54120b, seems to "work"
fine (was told by seller it didn't power up). Is the
designated test set the only one that will work? Are there
workarounds/juryrigs? Sounds stupid I know. My needs
aren't particularly demanding at the moment, basically
staring at square waves under 10mhz.
?I
seemed to see a message on this screen when I powered the
unit on for
the first time, something to do with calibration I think.
Does this mean
calibration info was lost (being the test set wasn't
present and
connected)? I saw something in a pdf service manual, stating
the unit
shouldn't be powered on w/o a test set connected, but up
to that point
didn't say why. It's not that I need dead specific
calibration currently, just wondering what's the scoop.
?I'm
not spending any or much more money. This thing was a
bargain, and I'll
leave it alone and use a beat up old Tek 2215a for the time
being.
Would love to start playing with it though. I realize you
can sometimes
find these test sets (54123a, but don't quote me) for
100$ on ebay. Just
that I need a car at the moment . . .
?Would love to hear of unorthodox methods of
connecting a probe, if they exist. The umbilical cord was
supplied. My guess is some kind of pre-amp is necessary, as
this unit isn't configured like the 54110 or equivalent
models. Didn't do a lot of research (or even look at the
pictures!) when choosing this item. I used a 54100 or
something many years ago in a testing lab. This unit, with
the proper test set, is so high in bandwidth, and so
inexpensive I'm hardly experiencing buyer's
remorse.
?In theory could the front end of a 54110,
54111, 54112 be retrofitted to this scope? I'm really
interested in learning everything I can about these models.
Was warned against HP scopes, as they use proprietary micros
and whatnot (mind features an extremely proprietary Motorola
68000!!!). I LOVE THE DAMEND THINGS.
?Thanks in advance for any help or info.
|
?
You are getting it! but in integer arithmetic. If
you convert to floating point at that part of the program you will will most
probably get the same result. You need to do division arithmetic before any
scaling and conversion to integers.
?
The fractional result of?1/X(1,1) is obviously
less than 1. It is also less than 1 when you use 3/X(1,1). this?can be only
scaled?before being?converted to a single precision integer. We
suspect you are probably trying to modify the wrong part of the program. But
without sight of the whole code we are working blind.
?
as a trial try...3000/X(1,1) and see what you
get.
?
Alan
G3NYK
?
----- Original Message -----
Sent: Friday, October 09, 2015 8:43
PM
Subject: [hp_agilent_equipment] Re: I
need a SINT value!
So.....?
how do I get the value of??? (1/x(1,1,))*3? that I need?
|
So.....? how do I get the value of??? (1/x(1,1,))*3? that I need?
|
To add to? Alan's answer and assuming X(1,1) is always an integer (which I'm not sure of, without knowing your program)? and V(N,2) is an integer (because it's sent as SINT):
If X(1,1)=0, 3/X(1,1) will throw a divide by zero error
Other results of 3/X(1,1) will either be 0, 1 or 3; all X(1,1) > 3 will give a result 0
So, if V(N,2) is what you send, any value of X(1,1) > 3 will send x(1,1).
Raymond
|
Re: alternatives to 54120b test set
On 10/09/2015 02:50 PM, Chris Tofu dreyfusshudson@... [hp_agilent_equipment] wrote: Hello group, just acquired a 54120b, seems to "work" fine (was told by
seller it didn't power up). Is the designated test set the only one that
will work? Are there workarounds/juryrigs? Sounds stupid I know. My
needs aren't particularly demanding at the moment, basically staring at
square waves under 10mhz. 10MHz?! The 54120B is a 20GHz sampling oscilloscope/TDR system with risetimes in the low double-digits of picoseconds. The test set is the input sampler. "Can't get there from here"...you need the test set or the oscilloscope is a brick. I'm not spending any or much more money. This thing was a bargain, and
I'll leave it alone and use a beat up old Tek 2215a for the time being.
Would love to start playing with it though. I realize you can sometimes
find these test sets (54123a, but don't quote me) for 100$ on ebay. Just
that I need a car at the moment . . . Certainly understandable prioritization, but it's probably best to put it on a shelf until you can score a test set. Would love to hear of unorthodox methods of connecting a probe, if they
exist. The umbilical cord was supplied. My guess is some kind of pre-amp
is necessary, as this unit isn't configured like the 54110 or equivalent
models. Didn't do a lot of research (or even look at the pictures!) when
choosing this item. I used a 54100 or something many years ago in a
testing lab. This unit, with the proper test set, is so high in
bandwidth, and so inexpensive I'm hardly experiencing buyer's remorse.
In theory could the front end of a 54110, 54111, 54112 be retrofitted
to this scope? Not even close. I'm really interested in learning everything I can about
these models. Was warned against HP scopes, as they use proprietary
micros and whatnot (mind features an extremely proprietary Motorola
68000!!!). I LOVE THE DAMEND THINGS. I hate to sound contrarian...but "proprietary"? They were used in hundreds of models of computers, no more proprietary than x86...but not suicide-inducing to program or try to get performance out of. ;) All this said, though, I have a 54120B, and I absolutely love it. It is a BEAST for TDR work...absolutely amazing capability and performance. With the faster test sets (which are not terribly common, unfortunately) it goes up to 34GHz. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
|
alternatives to 54120b test set
Hello group, just acquired a 54120b, seems to "work" fine (was told by seller it didn't power up). Is the designated test set the only one that will work? Are there workarounds/juryrigs? Sounds stupid I know. My needs aren't particularly demanding at the moment, basically staring at square waves under 10mhz.
?I
seemed to see a message on this screen when I powered the unit on for
the first time, something to do with calibration I think. Does this mean
calibration info was lost (being the test set wasn't present and
connected)? I saw something in a pdf service manual, stating the unit
shouldn't be powered on w/o a test set connected, but up to that point
didn't say why. It's not that I need dead specific calibration currently, just wondering what's the scoop.
?I'm
not spending any or much more money. This thing was a bargain, and I'll
leave it alone and use a beat up old Tek 2215a for the time being.
Would love to start playing with it though. I realize you can sometimes
find these test sets (54123a, but don't quote me) for 100$ on ebay. Just
that I need a car at the moment . . .
?Would love to hear of unorthodox methods of connecting a probe, if they exist. The umbilical cord was supplied. My guess is some kind of pre-amp is necessary, as this unit isn't configured like the 54110 or equivalent models. Didn't do a lot of research (or even look at the pictures!) when choosing this item. I used a 54100 or something many years ago in a testing lab. This unit, with the proper test set, is so high in bandwidth, and so inexpensive I'm hardly experiencing buyer's remorse.
?In theory could the front end of a 54110, 54111, 54112 be retrofitted to this scope? I'm really interested in learning everything I can about these models. Was warned against HP scopes, as they use proprietary micros and whatnot (mind features an extremely proprietary Motorola 68000!!!). I LOVE THE DAMEND THINGS.
?Thanks in advance for any help or info.
|
Dave McGuire