¿ªÔÆÌåÓý

Date
HP853A/8559A Problem
I have an HP853A Spectrum Analyzer display with the 8559A plugin. The display and plugin controls seem to work but it is not displaying a signal regardless of the setting. I tried an external signal
By Mike N2MS · #91907 ·
Re: [OT] - Bird 4391M Data connector information
Yes, Bird made 2 conversion boxes for th 4391 power analysts,? a 4380-488 and a 4380-232.? They were about the same size as the 4391 and sat under the 4391, attached with a short cable.? one box
By Trevor Barron · #91905 ·
Re: [OT] - Bird 4391M Data connector information
Ok, Bird engineer courteously answered, M is the military version and the connector's function is meant to connect with either IEEE-488 or RS232 boxes. So, it is not a serial port, needs (some)
By Giuseppe Marullo[iw2jww] · #91904 ·
Re: HP8560A power supply repair
I had the same issue on an HP 8562A. Replaced mine with an electrolytic I had lying around and haven't had issues since.
By Razvan · #91903 ·
HP8560A power supply repair
Today i fixed a problem in the 28 V line of our HP 8560A. The culprit was a dry elko in the voltage doubler, marked with polarity, 180 uF, 40 V. An interesting part, since it has three pins.
By Dieter Teuchert · #91902 ·
Re: Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
You don¡¯t loop the IF out back into RF ¨C you could use IF out on the second section when in zero span mode to an SDR like a down convertor. That way you get real time display of something up
By Noel VK3NH · #91901 ·
Re: Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
You would still need to swap the LO between chassis. Much easier to just swap the RF sections each time in one chassis.
By Noel VK3NH · #91900 ·
Re: Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
You can chain multiple IFs. I have two in one of my SAs and the 70900 is smart enough to select the appropriate one. There are inputs and outputs for the 21.something IF signal. But I don¡¯t think
By bownes · #91899 ·
Re: Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
David, Programming considerations (MODULE CONFIGURATION) See 400 and 401 at http://www.dudleylab.com/HP%2070000%20Series%20Modular%20System%20Manual%2070900-90286.pdf The HP 70900 (A or B) local
By Noel VK3NH · #91898 ·
Re: Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
Oh yes. The mainframe has plenty of oomph. There are many other modules besides SA that you may put in a single system. For example, one of Mine has the 70004 display and two 70001 mainframes
By bownes · #91897 ·
Re: HP 8642B develops issues when warming up
Although I am not about to place the boards of the 8642B into an oven, I have a video which you might find interesting that discusses the oven trick I discussed previously. This video is a link to
By DW · #91896 ·
Re: Can I capture a missed pulse with an old HP 54501A scope?
It looks to me that the pattern trigger mode should be able to do what you want. I have caught glitches many times but never used that scope. I might suggest that you set up pattern trigger mode to
By Mark Goldberg · #91895 ·
Re: Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
Are you sure the internal mainframe psu can cope wth two potentially power hungry SA's? This may preclude the worry of IF's... Regards Sent from Samsung by banging a nail into a piece of wood.
By nigel adams · #91894 ·
Re: Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
But the mainframe I bought from eBay has a 70902A IF unit, and I already have a couple of IF units on the 22 GHz front end. So perhaps something like 1) Remove a partially working power sensor to free
By Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...> · #91893 ·
Re: Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
You have to have an IF section. There are several choices.
By bownes · #91892 ·
Re: Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
[email protected]> wrote: I was not aware about the noise. I can't go into the application unfortnately. The unit I bought does have an 10 Hz to 300 kHz IF section, so could add an IF module. From
By Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...> · #91891 ·
Re: Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
The 21.4 MHz output from a front end module goes to the input of the IF module. The IF module has no provision for two inputs. How would you connect the two front end outputs to one IF module? You
By pianovt · #91890 ·
Re: Can I capture a missed pulse with an old HP 54501A scope?
Hello Chris, as I never used a HP scope, I can not say more. What I would suggest would be maybe a HP 53310 Modulation Analyzer, or a DPO. May I ask where you are based. Maybe, you can slink by my
By Tam Hanna · #91889 ·
Re: Can I capture a missed pulse with an old HP 54501A scope?
Hello Tam, Friday, October 12, 2018 It is pretty random, sometimes sevral times within a five second span sometimes once in 10 seconds. Thanks for the reply. I feel the 54501A may be able to do it,
By Chris Wilson · #91888 ·
Re: Can I set up a 2.9 GHz (70904A) and 22 GHz (70905A) spectrum analyzer in 70004A display and 70001A mainframe?
The 22 GHz one has a minimum frequency of 100 kHz, whereas the 2.9 GHz one has a minimum frequency of 10 Hz. I was interested in the range 20 kHz -100 kHz, and the 22 GHz front end can't do that. Dr
By Dr. David Kirkby from Kirkby Microwave Ltd <drkirkby@...> · #91887 ·