38dB gain
10 MHz - 2 GHz
VSWR 2.0 max

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James, the APC-7 connector is sexless. You spin the collar to move the threaded portion in or out of the collar nut. You do the same on the on the mating APC-7 connector/adapter. The most common adapters are APC-7 to N-f, or APC-7 to SMA-f (APC-7 to N-m, or APC-7 to SMA-m are also available but less common).

HP instrument divisions had a number of serial number formats over the years:

One format was of the form:? YYWWCNNNNN
Where:

YY = an indication of the year when the product was introduced or a?major change was made to the product.? YY = the number of years?since 1960.? Thus YY = 23 indicates the year 1983.

WW = the week of the year when the product was introduced or a major?change was made to the product; range of WW = 01-52.

C = The country in which the product was manufactured.? The letter?"A" indicates the USA as the country of manufacture, "J" for Japan, etc...

NNNNN = A unique number for each individual product within a product?model.? This was typically a sequential number beginning with?00101. Serial numbers <= 100 were usually pilot/proto instruments that? were for internal HP use/testing/development and not usually available to the outside world.

The format of product serial numbers changed in the early 1990s (somewhere around 1993).?Note that on many instrument models, the serial number format was not changed until there was a major change in the model itself, or its manufacture location.

NEWEST FORMAT

The newest format is of the form:? CCYYWWNNNN
Where:

CC = The ISO code for the country in which the product was?manufactured.? The letters "US" indicates the USA as the?country of manufacture. Others include MY for Malaysia, SG for Singapore, JP for Japan, or GB for Great Britain.?

YY = an indication of the year when the product was introduced or a?major change was made to the product.? YY = the number of years?since 1960.? Thus YY = 36 indicates the year 1996.

WW = the week of the year when the product was introduced or a major?change was made to the product; range of WW = 01-52.? Use of?these two characters to indicate week of the year is optional.?Note that for some products, the two WW characters are not?used to indicate the week of the year, but are used as part of?a six character NNNNNN sequence number.

NNNN = A unique number for each individual product within a product?model. This sequence number begins with 101.? For some products, the sequence number has six characters (NNNNNN)

The computer/calculator side of HP have their own serial number format variations...

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Dave, Bob,

?

Not only does the HP/Agilent/Keysight product line these days reflect the increased costs to design and produce a product given today’s higher wages and other huge operating expenses but I feel that there could be a little cost savings going on somewhere in there to minimize any residual cost impact to the customer from nonsense spending.

?

The week before last I received a Keysight 2022 calendar that was shipped UPS ** overnight** from their promotions department.? I had already hung a calendar last month from another manufacturer that came to me via US mail.

?

My watch and cell phone does a pretty good job of telling me the day and date without sinking the money barge.

?

Greg

The first on was made in 1994 and the second one was made in 1996.

Add 60 to the most significant digits of the serial. I.E. 34 + 60 = 94 and 36 +50 =96.

The other answers are correct concerning any internal differences.

Sam
W3OHM

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On 2/6/22 13:03, Greg Muir via groups.io wrote:

It’s a shame that around this time HP was starting to “dumb down” their product documentation.Aside from paying less people to do technical documentation (to some extent) I do understand the profit motive to push assembly level replacement instead of repair but the end user also faces a considerable increase in trying to keep their equipment alive.

Well, yeah, they "got suits". Their logic (if you can call it that) is "if it breaks, we'd be happy to sell them another one", and "we can't have people opening things up, they might do something stupid and sue us!"

Screw high-minded civic thinking, respecting your customer, and trying to be the best. Surely THAT won't get you a good quarterly bonus.

I love it when I see "NO USER SERVICEABLE PARTS INSIDE" on a piece of *test equipment*. "Wanna bet, bitch?"

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

James,

The APC-7 is a so-called hermaphroditic connector; it is both male and female. If you screw the outer ring one way or the other, completely, it becomes the other sex. I hope that makes sense.

73,
geo - n4ua

On 2/6/22 13:18, Bob Albert via groups.io wrote:

In the old days, HP did a commendable job.? As the years went by they became more profit oriented.

Correction: "Short-term profit oriented". These suits can't see past the end of the quarter. Bill Hewlett and Dave Packard were looking a lot farther down the line than that.

The decision to go public is often a big mistake when it comes to product value.

It's common knowledge that being publicly-traded is generally bad for a company's customers and encourages self-destructive corporate behavior, when viewed in the long term. If you think about it, it makes sense, as the company's true customers are no longer those who purchase its products, but its stockholders. Everything boils down to "shareholder value".

Disgusting.

No longer do managers attempt to create products; they now attempt to make money.? Not that money wasn't always the ultimate goal, but some outfits carry the banner a bit too much.? A lot too much.

Yes. And since suits typically have outsized egos, each successive generation of suits thinks they can "push things a little bit farther" than their predecessors, because of course they're better businessmen. So things deteriorate over time.

I recently looked at Keysight's offerrings regarding the present successor to the original HP200.? They no longer seem to offer a reasonably priced audio oscillator.
Very few analog scopes are available from anyone these days.? A digital scope is basically a computer with a screen readout, not an oscilloscope.

Analog oscilloscopes take real talent to design, digital oscilloscopes much less so. The former cannot easily be farmed out to India or China, while the latter can. Again, there's that short-term profit.

Further, the current crop of tech guys, while I think they're generally doing great things, seem to lack any real knowledge of oscilloscopes. They think that an oscilloscope can be made by slapping a display on a microcontroller and connecting a wire to an A/D input. Sure, you can generally display a waveform that way, but it's going to be garbage. And the market is FLOODED with finished products labeled "oscilloscope" that are little more than that.

These kids don't understand the difference, and they formulate assumptions based on incomplete knowledge, and then they vehemently defend those positions without being willing to learn about what they've missed.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

--

Thanks. Would you say that the 3611A... is likely to have the newest modifications then ? It also has a higher serial (last five digits).

Thanks for the info, I have searched for this but can only find what I think is called the Male APC-7 to SMA or N-Type, I cannot even find any photos for a Female version of the Adapter, Basically all of the adapters that I find seem to have the very same fitting that is on the front of the Analyzer.

James

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The prefix is related to the date that particular revision of the instrument went into production. The exact differences are usually outlined in the service manual, but there often isn’t a difference in operation.?

Hi,

I have two almost identical HP-8561E's.
One has a serial like 3425A00xxx and the other 3611A00xxx.?
What is the difference ? Thought the prefix was sort of a model number, but maybe not ?
Is there a website were these numbers can be looked up ?

BR Peter

Paul,
What is A160-0100? Is it a part number? I can't find anything related. Can you point me in the right direction?

I've already looked at HP cross reference files without any success.

Regards, Istvan