Re: 8640B External Reference
as he says a low pass filter will produce a quasi sine wave "gaussian responce"
By
arthurok
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#9208
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Re: 8640B External Reference
sorry i wasnt to clear on that, the DDS i was refering to actually has a clock multiplier build in that allow a max of 30MHz i think.
Mike Feher <n4fs@...> wrote: If you use 10 MHz as
By
lothar baier <microwaveengineer1968@...>
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#9207
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8140T reference tap
Sorry, guys, I did not mean for that to go to the reflector.
regard,s
Tom
By
Tom Dawson
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#9205
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Re: Anyone know if these movies still exist
They should at least be preserved, the Tek ones I remember went back
to the 50's and 60's and where 16MM.
By
pdxoregonpete <pdxoregonpete@...>
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#9204
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Re: Anyone know if these movies still exist
pdxoregonpete wrote:
About 10 years ago, I got a box of Tek VHS videos on NTSC video
measurements, etc. They might still be available, if wanted. Is it worth
checking?
-John
By
J Forster <jfor@...>
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#9202
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Re: 8640B External Reference
If you use 10 MHz as a clock for a DDS, then, you are just as well off using
a flip-flop. Your output will be just a 5 MHz square wave either way. Now if
you were to multiply the 10 MHz up first, like
By
Mike Feher
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#9203
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Anyone know if these movies still exist
http://www.movierevie.ws/people/80388/Hewlett-Packard.html
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
By
pdxoregonpete <pdxoregonpete@...>
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#9201
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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:
By
J Forster <jfor@...>
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#9199
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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
By
lothar baier <microwaveengineer1968@...>
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#9200
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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"
By
Tom Dawson
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#9198
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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
By
lothar baier <microwaveengineer1968@...>
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#9197
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HP-5245L Plug-Ins
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
By
David C. Hallam <dhallam@...>
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#9196
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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
By
Richard W. Solomon <w1ksz@...>
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#9195
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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
By
Dave Wise
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#9194
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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
By
marsac1212
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#9193
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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
By
iw3sgg <iw3sgg@...>
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#9192
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Re: 3325A A-Cal Failed.
MC1495s are available from Jameco.
findchips.com is a good resource for locating these "obsolete, but not
hopeless yet" parts.
By
David DiGiacomo
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#9191
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Re: 3325A A-Cal Failed.
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.
By
eboytoronto
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#9190
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Microwave Circuit boards
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
By
microwaveengineer1968 <microwaveengineer1968@...>
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#9189
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Re: 3325A A-Cal Failed.
try http://www.arcadechips.com/index.php?manufacturers_id=24, they are not cheap, about $5 ea
Mark <marks@...> wrote:
Hello All,
I am having trouble tracking down a MC1495 or
By
lothar baier <microwaveengineer1968@...>
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#9187
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