Anyone know if these movies still exist
Love the title to the 8640 movie titles
"Can You Turn Me On?"--8640 Story 1 (1981)
"You've Got Me Turned On, Now What?"--8640 Story 2 (1981)
-pete
The Tektronix movie masters were all trashed :(
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Re: 8640B External Reference
Easy. Take the 5 MHz, split it and mix it with itself. You may want a
buffer amp to follow the mixer output. Mini-Circuits Labs has the parts
you need.
Best,
John
Richard W. Solomon wrote:
toggle quoted message
Show quoted text
After moving to Arizona I know have at least one of my GPS Stabilized
Oscillators up and running. I intend to use the 10 MHz output as the
External Reference for a couple of EIP Counters and I had hoped my
8640B. But, HP in their infinite wisdom, has deemed that a 5 MHz
reference is needed. Is there any way to change that from 5 MHz to 10
MHz ? Maybe I should just stick 10 MHz in and see what happens ??
Any thoughts on this ?
Thanks, Dick, W1KSZ/7
Yahoo! Groups Links
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Re: Hp141+8553B+8552B and HP8601A
Most likely this is not gonna work, its too inacurate, the 8601 is not synthesized and therefore will drift way too much
iw3sgg <iw3sgg@...> wrote: Hi HP people!
A little post for us.
I have a spectrum analyzer HP141T with IF plug HP8552B and HP8553B.
The spectrum analyzer cover 0-110Mhz or 0-11Mhz.
I have a sweep generator HP8601A that sweep from 0-110 or 0-11Mhz.
Is possible to connect the sweep generator to analyzer for measure
filters like a tracking generator???
I connect the sweep out of HP8601A to scan in/out of HP8552B and I
switch the SCAN MODE to EXTernal.
I connect the out RF signal of HP8601A to DUT (device under test like
a crystal filter) and from DUT I go to spectrum analyzer.
The result is that the screen of HP141 move to the right of about 2-3cm.
Why??
Is like that the spectrum analyzer can't pursue the sweep signal.
Someone of us have same idea?
Is possible to use HP8601A Swepper to measure filters with HP141T like
a tracking generator???
Thanks for repply and I'm sorry for bad english,I'm in Italy.....
Best regards.
---------------------------------
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Re: 8640B External Reference
Dick,
I've got a new Spectracom 8140T frequency distribution "Tap" module that
takes 10 MHz in, buffers it, divides it by 2, then filters the output back
to a sine wave.
12 VDC "phantom power" also is applied to the 10 MHz input port.
If you don't find a better solution, figure 40 bucks plus shipping. No
hurry, I have several and they won't disappear anytime soon.
Regards,
Tom
toggle quoted message
Show quoted text
----- Original Message ----- From: "Richard W. Solomon" <w1ksz@...> To: <hp_agilent_equipment@...> Sent: Tuesday, November 20, 2007 5:16 PM Subject: [hp_agilent_equipment] 8640B External Reference After moving to Arizona I know have at least one of my GPS Stabilized
Oscillators up and running. I intend to use the 10 MHz output as the
External Reference for a couple of EIP Counters and I had hoped my
8640B. But, HP in their infinite wisdom, has deemed that a 5 MHz
reference is needed. Is there any way to change that from 5 MHz to 10
MHz ? Maybe I should just stick 10 MHz in and see what happens ??
Any thoughts on this ?
Thanks, Dick, W1KSZ/7
Yahoo! Groups Links
|
Re: 8640B External Reference
5MHz was quite common back then, it had to do with the fact that 5MHz XO had a better phasenoise, you will also find 5MHz on many older rubidium and cesium beam standarts.
You have basically two options, the first one is to just use a 2/1 frequency divider, you can find those at any semiconductor company fairly cheap, the other solution which is a bit more intricat is to use a DDS chip to generate your 5MHz out of a 10MHz XO
"Richard W. Solomon" <w1ksz@...> wrote:
After moving to Arizona I know have at least one of my GPS Stabilized
Oscillators up and running. I intend to use the 10 MHz output as the
External Reference for a couple of EIP Counters and I had hoped my
8640B. But, HP in their infinite wisdom, has deemed that a 5 MHz
reference is needed. Is there any way to change that from 5 MHz to 10
MHz ? Maybe I should just stick 10 MHz in and see what happens ??
Any thoughts on this ?
Thanks, Dick, W1KSZ/7
---------------------------------
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I acquired a box full of plug-ins for my 5245L counter and have a couple of
questions.
1. 5253B 50-500 MHz heterodyne oscillator The left most digit is not
displayed. i.e., 62.567 is displayed as 2.567. Is this the way it's
supposed to work?
2. 5257A Transfer Oscillator I can't find anything on the internet about
how to use it. I certainly don't want to spend any money on a manual until
I find out if it works and if it will be useful to me. Can some one give a
quick course in how to use it.
David
KC2JD/4
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After moving to Arizona I know have at least one of my GPS Stabilized
Oscillators up and running. I intend to use the 10 MHz output as the
External Reference for a couple of EIP Counters and I had hoped my
8640B. But, HP in their infinite wisdom, has deemed that a 5 MHz
reference is needed. Is there any way to change that from 5 MHz to 10
MHz ? Maybe I should just stick 10 MHz in and see what happens ??
Any thoughts on this ?
Thanks, Dick, W1KSZ/7
|
Re: Hp141+8553B+8552B and HP8601A
Sorry, the sweep calibration is much too inaccurate
to use 8601A+8553B as a tracking generator. To use
8601A as a TG, it must be Option 007, and your RF
module must be an 8553L, not an 8553B.
You need an 8443A or 8443B.
Regards,
David Wise
toggle quoted message
Show quoted text
-----Original Message-----
From: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...]On Behalf Of iw3sgg
Sent: Tuesday, November 20, 2007 2:01 PM
To: hp_agilent_equipment@...
Subject: [hp_agilent_equipment] Hp141+8553B+8552B and HP8601A
Hi HP people!
A little post for us.
I have a spectrum analyzer HP141T with IF plug HP8552B and HP8553B.
The spectrum analyzer cover 0-110Mhz or 0-11Mhz.
I have a sweep generator HP8601A that sweep from 0-110 or 0-11Mhz.
Is possible to connect the sweep generator to analyzer for measure
filters like a tracking generator???
I connect the sweep out of HP8601A to scan in/out of HP8552B and I
switch the SCAN MODE to EXTernal.
I connect the out RF signal of HP8601A to DUT (device under test like
a crystal filter) and from DUT I go to spectrum analyzer.
The result is that the screen of HP141 move to the right of
about 2-3cm.
Why??
Is like that the spectrum analyzer can't pursue the sweep signal.
Someone of us have same idea?
Is possible to use HP8601A Swepper to measure filters with HP141T like
a tracking generator???
Thanks for repply and I'm sorry for bad english,I'm in Italy.....
Best regards.
|
Re: HP 35677A S-Parameter Test Set
Yes that would help..I just need to know what the little board inside is doing. Most of the enclosure is empty, so I have lots of space to put a single board compute with some extra hardware. Yes I am aware of the discussion you mentioned....but I got the full S parameter test set for about $150 very cheap. Please send it to: isaac.martinez at sbcglobal dot net Thank you --- In hp_agilent_equipment@..., "Martin Fischer" <Martin.Fischer@...> wrote:
Hello marsac1212,
would it be helpful to you if I send you a scanned copy of the 35677A
schematic?
BTW Are you aware of the thread about the HP 35676A/B Transmission
Reflection Kit for the HP 3577?
Regards
Martin
[Non-text portions of this message have been removed]
|
Hp141+8553B+8552B and HP8601A
Hi HP people!
A little post for us.
I have a spectrum analyzer HP141T with IF plug HP8552B and HP8553B.
The spectrum analyzer cover 0-110Mhz or 0-11Mhz.
I have a sweep generator HP8601A that sweep from 0-110 or 0-11Mhz.
Is possible to connect the sweep generator to analyzer for measure
filters like a tracking generator???
I connect the sweep out of HP8601A to scan in/out of HP8552B and I
switch the SCAN MODE to EXTernal.
I connect the out RF signal of HP8601A to DUT (device under test like
a crystal filter) and from DUT I go to spectrum analyzer.
The result is that the screen of HP141 move to the right of about 2-3cm.
Why??
Is like that the spectrum analyzer can't pursue the sweep signal.
Someone of us have same idea?
Is possible to use HP8601A Swepper to measure filters with HP141T like
a tracking generator???
Thanks for repply and I'm sorry for bad english,I'm in Italy.....
Best regards.
|
MC1495s are available from Jameco.
findchips.com is a good resource for locating these "obsolete, but not
hopeless yet" parts.
|
Hi,
I have repaired a few 3325a synthesizers. I have found that the Sample /Hold switches U20 and U24 have been broken.
These are quad devices, only three channels are used in each application. Sometimes swapping them will fix the problem.
If you have a manual check service group I
The part is an LF13331D. The part is obsolete.
A similar, inter-changeable part is used in the 3336 synthesizer/level generators.
Good luck !!
John Barnes
toggle quoted message
Show quoted text
---------- Original Message ---------------------------------- From: John Day <johnday@...> Reply-To: hp_agilent_equipment@... Date: Tue, 20 Nov 2007 09:15:50 -0500 At 09:02 AM 11/20/2007, you wrote:
Hello All,
I am having trouble tracking down a MC1495 or SG1495 or 1826-0437.
Its a 'wideband linear 4-quadrant multiplier' used in the AM and
Amplitude levelling in a 3325A.
Does anyone sell this chip anymore? It has been obsolete for some time.
Although I have never tried this trick in a 3325A, I have used the
Analog Devices AD633 (readily available from DigiKey and others) in
other applications where I originally used the MC1495. It might be
worth some investigation.
I don't think I have the schematics of the 3325A, but if you can post
or email me the appropriate section I can try to sketch something out for you.
John Day
Toronto
Is there a functional / electrical equivalent?
Best regards,
Mark.
PS I have 3x A3 boards, all with the same problem!
Symptom is A-Cal fail, All 3 self test fail.
The voltages around this IC are all wrong.
mcs
________________________________________________________________ Sent via the WebMail system at aztec-net.com
|
Im building up some spare parts for my testequipment right now, problem
is that with Rogers materials most PCB houses go by the panel, the
panel cost is about $400ea for RO4350B with 0.5mm dielectric (0.020)
in addition it would yield about 100boards when i really only need 10
I thereby encourage anyone who is currently pondering a project but is
faced with the same dilemma to contact me at
microwaveengineer1968@..., maybe we can "PCB POOL" the only
requirement is that the board has to be on RO4350B 0.020 dielectric
20oz copper.
|
try , they are not cheap, about $5 ea
Mark <marks@...> wrote:
Hello All,
I am having trouble tracking down a MC1495 or SG1495 or 1826-0437.
Its a 'wideband linear 4-quadrant multiplier' used in the AM and
Amplitude levelling in a 3325A.
Does anyone sell this chip anymore?
Is there a functional / electrical equivalent?
Best regards,
Mark.
PS I have 3x A3 boards, all with the same problem!
Symptom is A-Cal fail, All 3 self test fail.
The voltages around this IC are all wrong.
mcs
---------------------------------
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|
At 09:02 AM 11/20/2007, you wrote: Hello All,
I am having trouble tracking down a MC1495 or SG1495 or 1826-0437.
Its a 'wideband linear 4-quadrant multiplier' used in the AM and
Amplitude levelling in a 3325A.
Does anyone sell this chip anymore? It has been obsolete for some time. Although I have never tried this trick in a 3325A, I have used the Analog Devices AD633 (readily available from DigiKey and others) in other applications where I originally used the MC1495. It might be worth some investigation. I don't think I have the schematics of the 3325A, but if you can post or email me the appropriate section I can try to sketch something out for you. John Day Toronto Is there a functional / electrical equivalent?
Best regards,
Mark.
PS I have 3x A3 boards, all with the same problem!
Symptom is A-Cal fail, All 3 self test fail.
The voltages around this IC are all wrong.
mcs
|
Have you tried ebay ?
Mark <marks@...> wrote: Hello All,
I am having trouble tracking down a MC1495 or SG1495 or 1826-0437.
Its a 'wideband linear 4-quadrant multiplier' used in the AM and
Amplitude levelling in a 3325A.
Does anyone sell this chip anymore?
Is there a functional / electrical equivalent?
Best regards,
Mark.
PS I have 3x A3 boards, all with the same problem!
Symptom is A-Cal fail, All 3 self test fail.
The voltages around this IC are all wrong.
mcs
---------------------------------
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|
Hello All,
I am having trouble tracking down a MC1495 or SG1495 or 1826-0437.
Its a 'wideband linear 4-quadrant multiplier' used in the AM and
Amplitude levelling in a 3325A.
Does anyone sell this chip anymore?
Is there a functional / electrical equivalent?
Best regards,
Mark.
PS I have 3x A3 boards, all with the same problem!
Symptom is A-Cal fail, All 3 self test fail.
The voltages around this IC are all wrong.
mcs
|
HP 35677A S-Parameter Test Set
Hello marsac1212,
would it be helpful to you if I send you a scanned copy of the 35677A
schematic?
BTW Are you aware of the thread about the HP 35676A/B Transmission
Reflection Kit for the HP 3577?
Regards
Martin
|
Re: 35677A service/ internal diagram.
Planning to use mini-circuits ZASWA-2-50DR 1.- Yes it is absorptive type i.e 50 ohm terminated 2.-The switch is DC coupled, so LF does not seem to be a problem... likely it is not PIN based. 3.- Isolation is about 90 db in the range of interest... it will never beat the 100 dB of a mechanical switch but it will last almost forever....besides that I think I can take care of the isolation with a 12 term 2 port correction. Given that the 3577A can not do that type of correction. a.) the original switch terminates the unused arm in 50ohm, this condition needs to be fullfilled by your solid state switch as well !
b.) low frequency boundary
many solid state switches are based on GaAs and suffer from
poor low frequency performance, pin switches are even worse, the solid state switch used in the 85046A for example exhibits poor RF characteristics below 100KHz
c.) isolation
the mechanical switches have fairly high isolation, get a
datasheet of the Agilent 8763A (this is what they used) your Solid state switch needs to be equal or better !
marsac1212 <marsac1212@...> wrote:
Hello group:
Does anybody have the service manual of the 35677A S parameter test
set? All I need to know is what the pin out of the little connector on the back?
I am trying to change the internal mechanical coaxial switch for a
solid state one and use the S parameter with my own LF network analyzer.
---------------------------------
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I have read HP's Technical Specifications and comparison of the 8752C
and 8753D. I am confident the 8752C features are sufficient for the
work I'm doing.
So my question for the group is: Are there other factors beyond
technical specifications to consider? For example, is it more
difficult to obtain spare parts and technical documentation on the
8752C compared to the 8753D? Do they share the same (hard to find)
CRT? Does this group have experience in troubleshooting the 8752C?
Thanks,
Jim W4TVI
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