Discussion:
HP/Agilent 3325B
(too old to reply)
pfitz
2004-04-30 14:50:33 UTC
Permalink
Hi All,

I was wondering if anyone could help me out. In the past I've just been
using this beast as a standard signal generator and that suited me fine
because I didn't have any documentation or instructions on how to create my
own functions on it, and besides I had a Stanford Research DS345 Function
Generator for creating these.

The limitation of this however was that it could only generate functions up
to 10Mhz, and for the most part up to now that has been ok, but now in a
system I'm designing I need to be able to generate a frequency of 20Mhz. All
I want to do essentially, is generate a 50% duty cycle square waveform @20
MHz and vary the rise and fall times, Is this possible with the 3325B?

I've tried contacting Agilent but they say the manual is out of production
and they don't have a pdf.

If anyone knows anything about this I'd appreciate it if they'd contact me
on the email given without the nospam.



regards



pfitz
Winfield Hill
2004-04-30 15:23:49 UTC
Permalink
pfitz wrote...
Post by pfitz
I was wondering if anyone could help me out. In the past I've just been
using this beast as a standard signal generator and that suited me fine
because I didn't have any documentation or instructions on how to create my
own functions on it, and besides I had a Stanford Research DS345 Function
Generator for creating these.
The limitation of this however was that it could only generate functions up
to 10Mhz, and for the most part up to now that has been ok, but now in a
system I'm designing I need to be able to generate a frequency of 20Mhz. All
MHz and vary the rise and fall times, Is this possible with the 3325B?
According to the HP data sheet, the range is sine waves to 21MHz,
square-waves, triangles and ramps to 11MHz. The square-wave rise
time is 20ns.


Thanks,
- Win

whill_at_picovolt-dot-com (use hill_at_rowland-dot-org for now)
Dejan Durdenic
2004-04-30 18:07:27 UTC
Permalink
Post by pfitz
The limitation of this however was that it could only generate functions up
to 10Mhz, and for the most part up to now that has been ok, but now in a
system I'm designing I need to be able to generate a frequency of 20Mhz. All
MHz and vary the rise and fall times, Is this possible with the 3325B?
I've tried contacting Agilent but they say the manual is out of production
and they don't have a pdf.
If anyone knows anything about this I'd appreciate it if they'd contact me
on the email given without the nospam.
regards
pfitz
No, HP3325A cannot vary rise/fall times of squarewave output and anyway
cannot
generate more than 11MHz squarevawe at all...It has some powerfull sweep
functions,
but it's essentially classic function generator.

- Dejan
pfitz
2004-05-04 08:28:48 UTC
Permalink
Can anyone recommend a Function generator that will be capable of doing
this, I may need to hire one for 2 weeks or so?
Post by Dejan Durdenic
Post by pfitz
The limitation of this however was that it could only generate functions
up
Post by pfitz
to 10Mhz, and for the most part up to now that has been ok, but now in a
system I'm designing I need to be able to generate a frequency of 20Mhz.
All
Post by pfitz
MHz and vary the rise and fall times, Is this possible with the 3325B?
I've tried contacting Agilent but they say the manual is out of production
and they don't have a pdf.
If anyone knows anything about this I'd appreciate it if they'd contact me
on the email given without the nospam.
regards
pfitz
No, HP3325A cannot vary rise/fall times of squarewave output and anyway
cannot
generate more than 11MHz squarevawe at all...It has some powerfull sweep
functions,
but it's essentially classic function generator.
- Dejan
Kevin Carney
2004-05-04 13:05:12 UTC
Permalink
HP 8082A pulse gen can do that. The frequency is not real accurate as it
uses a potentiometer to set the rate. It does have controls that will vary
the rise and fall time. They made a few generators like that but not real
solid on the frequency. Check out Tucker Electronics, Test Equipment
Connection, or any other used equipment company
--
change .combo to .com for correct email

***************************************************
"We ought always to know precisely why a given job
is done in a particular way, and why it is done at
all, and why it can't be done more efficiently,
if it must be done at all."-- T.J.Watson

***************************************************
Post by pfitz
Can anyone recommend a Function generator that will be capable of doing
this, I may need to hire one for 2 weeks or so?
Post by Dejan Durdenic
Post by pfitz
The limitation of this however was that it could only generate functions
up
Post by pfitz
to 10Mhz, and for the most part up to now that has been ok, but now in a
system I'm designing I need to be able to generate a frequency of 20Mhz.
All
Post by pfitz
I want to do essentially, is generate a 50% duty cycle square waveform
@20
Post by Dejan Durdenic
Post by pfitz
MHz and vary the rise and fall times, Is this possible with the 3325B?
I've tried contacting Agilent but they say the manual is out of
production
Post by Dejan Durdenic
Post by pfitz
and they don't have a pdf.
If anyone knows anything about this I'd appreciate it if they'd
contact
Post by pfitz
me
Post by Dejan Durdenic
Post by pfitz
on the email given without the nospam.
regards
pfitz
No, HP3325A cannot vary rise/fall times of squarewave output and anyway
cannot
generate more than 11MHz squarevawe at all...It has some powerfull sweep
functions,
but it's essentially classic function generator.
- Dejan
pfitz
2004-05-04 13:04:45 UTC
Permalink
The frequency has to be pretty stable for my app ~ 0.4ppm, Are there any
others out there that might fit the bill?
Post by Kevin Carney
HP 8082A pulse gen can do that. The frequency is not real accurate as it
uses a potentiometer to set the rate. It does have controls that will vary
the rise and fall time. They made a few generators like that but not real
solid on the frequency. Check out Tucker Electronics, Test Equipment
Connection, or any other used equipment company
--
change .combo to .com for correct email
***************************************************
"We ought always to know precisely why a given job
is done in a particular way, and why it is done at
all, and why it can't be done more efficiently,
if it must be done at all."-- T.J.Watson
***************************************************
Post by pfitz
Can anyone recommend a Function generator that will be capable of doing
this, I may need to hire one for 2 weeks or so?
Post by Dejan Durdenic
Post by pfitz
The limitation of this however was that it could only generate
functions
Post by pfitz
Post by Dejan Durdenic
up
Post by pfitz
to 10Mhz, and for the most part up to now that has been ok, but now
in
Post by Kevin Carney
a
Post by pfitz
Post by Dejan Durdenic
Post by pfitz
system I'm designing I need to be able to generate a frequency of
20Mhz.
Post by pfitz
Post by Dejan Durdenic
All
Post by pfitz
I want to do essentially, is generate a 50% duty cycle square waveform
@20
Post by Dejan Durdenic
Post by pfitz
MHz and vary the rise and fall times, Is this possible with the 3325B?
I've tried contacting Agilent but they say the manual is out of
production
Post by Dejan Durdenic
Post by pfitz
and they don't have a pdf.
If anyone knows anything about this I'd appreciate it if they'd
contact
Post by pfitz
me
Post by Dejan Durdenic
Post by pfitz
on the email given without the nospam.
regards
pfitz
No, HP3325A cannot vary rise/fall times of squarewave output and anyway
cannot
generate more than 11MHz squarevawe at all...It has some powerfull sweep
functions,
but it's essentially classic function generator.
- Dejan
Ian Buckner
2004-05-05 15:20:55 UTC
Permalink
The 33250A is listed as the replacement box. The datasheet
is on this page:
http://we.home.agilent.com/USeng/nav/-11267.536881980/pd.html
A quick scan gets 50MHz pulse with variable rise/fall time.
Frequency accuracy is 1ppm, but you can lock it to an external
reference.
Stability is 0.3ppm 18-28 deg C.

Regards
Ian
Post by pfitz
The frequency has to be pretty stable for my app ~ 0.4ppm, Are there any
others out there that might fit the bill?
Post by Kevin Carney
HP 8082A pulse gen can do that. The frequency is not real
accurate as it
Post by pfitz
Post by Kevin Carney
uses a potentiometer to set the rate. It does have controls that will vary
the rise and fall time. They made a few generators like that but not real
solid on the frequency. Check out Tucker Electronics, Test
Equipment
Post by pfitz
Post by Kevin Carney
Connection, or any other used equipment company
--
change .combo to .com for correct email
***************************************************
"We ought always to know precisely why a given job
is done in a particular way, and why it is done at
all, and why it can't be done more efficiently,
if it must be done at all."-- T.J.Watson
***************************************************
Post by pfitz
Can anyone recommend a Function generator that will be capable of doing
this, I may need to hire one for 2 weeks or so?
Post by Dejan Durdenic
Post by pfitz
The limitation of this however was that it could only
generate
Post by pfitz
Post by Kevin Carney
functions
Post by pfitz
Post by Dejan Durdenic
up
Post by pfitz
to 10Mhz, and for the most part up to now that has been ok, but now
in
Post by Kevin Carney
a
Post by pfitz
Post by Dejan Durdenic
Post by pfitz
system I'm designing I need to be able to generate a
frequency of
Post by pfitz
Post by Kevin Carney
20Mhz.
Post by pfitz
Post by Dejan Durdenic
All
Post by pfitz
I want to do essentially, is generate a 50% duty cycle
square
Post by pfitz
waveform
Post by Kevin Carney
Post by pfitz
@20
Post by Dejan Durdenic
Post by pfitz
MHz and vary the rise and fall times, Is this possible with
the
Post by pfitz
3325B?
Post by Kevin Carney
Post by pfitz
Post by Dejan Durdenic
Post by pfitz
I've tried contacting Agilent but they say the manual is out of
production
Post by Dejan Durdenic
Post by pfitz
and they don't have a pdf.
If anyone knows anything about this I'd appreciate it if they'd
contact
Post by pfitz
me
Post by Dejan Durdenic
Post by pfitz
on the email given without the nospam.
regards
pfitz
No, HP3325A cannot vary rise/fall times of squarewave output
and
Post by pfitz
anyway
Post by Kevin Carney
Post by pfitz
Post by Dejan Durdenic
cannot
generate more than 11MHz squarevawe at all...It has some
powerfull
Post by pfitz
sweep
Post by Kevin Carney
Post by pfitz
Post by Dejan Durdenic
functions,
but it's essentially classic function generator.
- Dejan
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