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Mine arrived today. Alas, it uses a USB B connector instead of a more common USB mini or micro; I gotta get a cable. Mine has the comparator IC marked only, "AJK BAA." Yes, this is an Analog Devices

What's wrong with my Rubidium reference that would make me choose a GPS disciplined? Costed me $75 on EPay, but still needs a power supply, case and diastribution amplifiers, yet another project to

I have the same equipment and don't need insane accuracy (1Hz in 100MHz is more the sufficient - 10e-8). I will put the 1PPS signal into the A input, the 10MHz from the ref osc out on the back into

They say coffee helps you live longer, I don’t know about how true that is but I do know that it definitely makes me enjoy the time I do have much more! Peter

?????? There are many of us who are slaves to coffee. Have few other bad habits but I can't even talk in the morning before drinking a cup. -- Richard Knoppow dickburk@... WB6KBL

Yes, works as advertised as far as I can tell. There is plenty of discussion and many screenshots

Two questions for the original poster: How accurate do you need (want) to be? and what are you using the counter for? Time and frequency precision can become an obsession - Time Nuttery. Robert

There has been discussion recently about generating fast rise/fall time pulses by various means. Here is a link to a Leo Bodnar device that will provide <40 ps rise/fall time, 50% duty cycle, 10 MHz

Correct! Need more caffeinated beverage. Thanks! [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:

?????? On a standard scope with the same signal on X and Y in phase is a line at 45degrees to the right, 180degrees out of phase is a straight line tilted 45 degrees to the left, a circle is 90

Dr. Joel Dunsmore hangs out in the Forums on HP/Agilent/Keysight. [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:

If anyone here designed commercial VNAs, I'd like to call attention to some recent posts I've made to the EEVblog metrology forum on the topic of using an SA and a computer to measure amplitude and

By far and away the best choice is going to be a GPS disciplined oscillator such as an HP 3801A or a Thunderbolt. A good GPSDO should be good to at least 1x10^-10 ? (1ppb) over the course of a day.

As Dave from Artek says, it is helpful to know the serial number of the unit. What you most likely want is the "Operation and Service Manual" for this unit. The part number for the manual is

I can't recall where, but someone posted a comment to the effect that the PPS output of their GPS unit had significant (~20 nS) jitter. I'd suggest feeding the output of the reference to be checked

Ok. So you have a Trrimble Thunderbolt GPS?

Hi Anders, with my counters, I put a 10 MHz sinewave from the GPSDO (thunderbolt) on channel 1 of oscilloscope, triggering on it, then I put the counter's 10 MHz reference to channel 2 and I trim the

What would be a reasonably cheap way of checking frequency calibration? I have an old hp 5328, with oven. I also have one of those cheap GPS modules where the PPS output can be reprogrammed. I set it

Paul There are several different versions of the service manuals for the 8558B.??? In order to direct you properly could you please tell us the serial number of your

Hello all, I'm looking for hp5300a / 5303a manual service thank Roberto