Same success as Dave previously mentioned.
I exclusively use the FR301 on every job for unsoldering components, etc. It successfully removes all solder from thru holes allowing leaded parts to be removed easily. It also works wonderfully on those boards where poorly experienced designers didn't follow the layout rules making the holes so small that it is nearly a press fit to get the lead to pass through.
Yes, it is somewhat large but the advantage of not having trailing cables or hoses certainly offsets any objections to the size.
I also recommend picking up a few various size tips for it.
Greg
On Monday, February 24, 2025 at 01:53:05 PM MST, HP-Agilent-Keysight-equipment@groups.io <digestnoreply@groups.io> wrote:
| | | This is a digest for HP/Agilent/Keysight test equipment.. View all your groups.io groups, and edit your subscriptions, here. | | Do not reply to this email. To reply to a message, click the Reply link under the message. | | | Topics in this digest: | | | | | | | | | 1a.? | Re: 8753C VNA option upgrade
From: N.keyser@...
Date: Mon, 24 Feb 2025 08:33:46 MST
Hi Jinxie, ? Thank you very much for replying. I am currently in the process of attempting the upgrades: I did receive some feedback on the subject - I just need to ensure that I take the time to properly understand the procedure first. ? Thanks again for considering the request ? Kind regards | | View/Reply Online | Reply To Group | Reply To Sender | Mute Topic | Top ^ | New Topic | | | | | 1b.? | Re: 8753C VNA option upgrade
From: Caesar Valenti
Date: Mon, 24 Feb 2025 09:44:12 MST
Jinxie, ? That keyword text is obviously what I wrote to you at some point.? Anyone with an 8753/8752/871x/8720/8719/8722/8702 can write to me (with the s/n) and get the keywords they need to enable any option.? This is a service I provide for free so that no one has to run the risk of unsoldering and programming EEPROMs. I have been doing this for almost 10 years now and get a request about once or twice per week. CV | | View/Reply Online | Reply To Group | Reply To Sender | Mute Topic | Top ^ | New Topic | | | | | | | | | | | 4a.? | Re: Accurately measuring 1000pF and 100pF capacitors, to calibrate 4276A?
From: Richard Parrish
Date: Mon, 24 Feb 2025 10:15:17 MST
If you need accurate measurements, I do have an Andeen-Hagerling 2500E which can measure C @1kHz to better than 5ppm and 8 digits resolution even at 10pF.? I rarely get it calibrated but its still the best on the market. If you decide on what you're going to use as a standard, I'd be glad to measure it for you if you send your standard to me. Richard | | View/Reply Online | Reply To Group | Reply To Sender | Mute Topic | Top ^ | New Topic | | | | | 4b.? | Re: Accurately measuring 1000pF and 100pF capacitors, to calibrate 4276A?
From: Greg Muir
Date: Mon, 24 Feb 2025 10:48:02 MST
I use a Boonton 76-3A precision decade capacitor for my calibration checks. I originally picked it up for calibration of an old Boonton 72BD meter (0.001 to 2000 pF capacitance range) but it now also serves as a good calibration check on a few HP units that I have. It has capacitance selection from 1 to 1221 pF in 1-2-3-5 x1, x10 & x100 ranges. Accuracy is 0.1% ±0.001 pF. The connections are made through special BNC(M) connectors without outer bayonet shell. But the unit can occasionally can be found in used condition with the Boonton output connector adapter to normal BNC(F) interface or you can make your own.
They sometimes come up pretty inexpensive on ePay amidst the real price gougers.
Greg | | View/Reply Online | Reply To Group | Reply To Sender | Mute Topic | Top ^ | New Topic | | | | | 5a.? | E5052A Power On Test (3.3V Bus Supply)
From: jmr
Date: Mon, 24 Feb 2025 11:17:08 MST
I wonder if anyone here has experience or access to an Agilent E5052A signal source analyser? Mine is about 20 years old and is recently showing signs of unreliability. The main symptom is an occasional power on self test fail and it then reports issues with a 3V3 power supply voltage on the A3 DSP/ADC board where it reads low at typically 2.96V. I think a pass requires >2.96V but this may be firmware dependent. My E5052A is running the latest firmware V2.51.
I think this 3V3 supply is common across the backplane but it gets reported as an A3 test in the service menu. The 5V PSU rail also reads low at between 4.7 and 4.8V but this is still a pass (shows true for the test result)
Also, for several years now it has shown a stubborn internal spurious at 60 kHz at a very low level. This very slightly spoils any phase noise measurements even though it shows up at about -140dBc then the trace is in phase noise mode in dBc/Hz. I'm not sure what causes this internal 60 kHz term, it may be from a PSU or the display or a divided clock. It may be that the 60kHz spurious term is a feature of this analyser as it is present on all my plots dating back over 13 years. It's not caused by anything nearby to the instrument as it does it regardless of position or proximity to other equipment. Plus the other E5052A I've used in the past (in a different location) is exactly the same.
The 60kHz spurious is also present when I swap across to the baseband input even with a very clean LF signal fed to the 0-40 MHz baseband input. So this spurious must be getting in at the ADC if it affects the baseband input as well.
? I've seen similar on another E5052A that also shows a lowish 3V3 voltage (but it never shows a power on test failure) and it also has the permanent 60 kHz spurious on all phase noise tests on the main RF input. ? The service menu password is only three characters long and is 'kid' ? If anyone has access to a healthy E5052A could they enter the service menu and do a manual Power On Test (POT) in the service menus? Then report the 5V and 3.3V results for the A3 module Mine shows anything from 2.91V to 3.05V and I think the pass/fail threshold for the POT is somewhere around 2.96V. The other E5052A I have some access to shows 2.982V to 3.08V and never reports a POT failure. Thanks in advance for any replies Jeremy | | View/Reply Online | Reply To Group | Reply To Sender | Mute Topic | Top ^ | New Topic | | | | | | | 5c.? | Re: E5052A Power On Test (3.3V Bus Supply)
From: jmr
Date: Mon, 24 Feb 2025 13:30:07 MST
Hi Jim, thanks. I've just spent some time fishing around the outside of the chassis with a loop probe and the 60 kHz spurious is from the front of the instrument around the display. It isn't a single tone, it is spread over many kHz on the high side of 60 kHz and looks to be caused by digital traffic. It might be the display causing it. It seems to be at 59 kHz and it may be backlight related but it looks like it has some digital traffic on it.? ? Probing around the screen area of an E5071B VNA (I think this has the same touch screen display) shows exactly the same waveform so it is definitely screen related in some way. I'm not sure how this is getting into the baseband path but because it is also there on the main phase noise display I think it is getting in at the ADC/DSP module, possibly via a power supply rail. Hopefully a tired decoupling cap is the cause. | | View/Reply Online | Reply To Group | Reply To Sender | Mute Topic | Top ^ | New Topic | | | | | 5d.? | Re: E5052A Power On Test (3.3V Bus Supply)
From: jmr
Date: Mon, 24 Feb 2025 13:53:00 MST
Turning the backlight off makes the spurious term go away when probing :) ? There is a soft menu button that turns off the backlight and pressing this makes the spurious vanish on the probe (that feeds to another spectrum analyser). ? Also if I do a screen grab via Excel and GPIB (with the backlight ON) the 60kHz spurious is present on the spectrum from the baseband input. But if I grab the screen with the backlight off the baseband spectrum is clean on the grabbed screen image in Excel. A huge improvement. ? I guess I can live with this when grabbing screen plots as (hopefully) I can add the 'backlight off' command to the excel routine. ? So screen grabs will look much better. I'll have a look for the backlight command in the programming guide... | | View/Reply Online | Reply To Group | Reply To Sender | Mute Topic | Top ^ | New Topic | | | | | 6a.? | HP 8660B/86602B developed output stability problem, getting-started suggestion(s) request
From: David Feldman
Date: Mon, 24 Feb 2025 12:14:12 MST
My HP 8660B/86602B (owned since 1995 - I've owned it longer than it's initial life in industry, I believe) failed to produce a stable output signal when powered up a few days ago (it has worked properly over the years, although it's use is not frequent.) I wish to tackle repair (at least as a learning experience.)
When tested today at some spot CW frequencies (1, 2, 5, 10, 20, 30, 50 and 100 MHz), output signal is below nominal by 200-300 kHz and is not stable (movement around carrier seen on spectrum analyzer display and listing on a receiver yields a noisy and unstable signal.) A swap-out of the 86602B RF plug-in (I have a spare) yielded no difference in behavior.
I have original operator/service manuals for the three key components (the 8660B, 86602B and 11661B frequency extension module inside the 8660B) and associated extension cables/boards (the 11672 service kit and 08660-60070 extender card set), so at least not flying totally blind.
My getting-started question is from this observation:
The 8660B manual's adjustment/test procedures don't mention whether the 11661B frequency extension module's behavior should be considered (as far as I can see, there is no mention of the 11661B in the 8660B manual at all.) It appears to be silent as to whether the 8660B should be evaluated with the 11661B installed (or not.) The 11661B manual focuses on that device and presumably assumes that the 8660B containing it is working normally.
Where (at the 8660B itself or the 11661B FEM) should I start troubleshooting?
Thanks for any suggestions (other than recycling the hardware and replacing it with a TinySA or similar)! | | View/Reply Online | Reply To Group | Reply To Sender | Mute Topic | Top ^ | New Topic | | | | | | | | | You are receiving this email because you are subscribed to HP-Agilent-Keysight-equipment@groups.io via big_sky_explorer@.... You can unsubscribe here. | |
