[time-nuts] HP 3048A Phase Noise Measurement System Accessories / Options

[John Miles]

> Hi,
>
> recently I added a nice 11848A phase noise interface to the herd.
>
> It came with the options K23 (DC Blocking Filter) and K21 (AM Detector
> Filter), including the complete set of adapters, manuals and matching /
> calibration networks.
> If anyone is interested, I'll be happy to scan the manuals. I think
> these are not yet out on the web.

I've uploaded my cal, ops, and ref manual scans to http://www.hparchive.com
(see the Equipment link under '3048A' near the bottom of the page), as well
as two different editions of the 11848A service manual, but I don't think
I've seen any schematics for the various option modules.  Would be good to
add those to the page.

> Another interesting detail: The 11848A has options 201, 300 and H26. H26
> appears to denote the opt 201 microwave phase detector with extended
> frequency range to 26.5 GHz (with male 3.5 connectors on the front
> panel). I've never seen that option before. I have no idea what 300
> stands for though.

Sounds like a nice box.  Did it come with any software?  Since option 301
was the MS-DOS version, maybe 300 refers to another software option,
possibly a customer-specific mod to support the 26.5 GHz mixer.

> I would appreciate to hear about any other options and accessories for
> the 3048A / 11848A that are not covered by the common manuals.
>
> Btw. are there any known projects to run the 3048A on HP/Agilent VEE or
> other nowadays environments?

Not on VEE, but you can run it under the Transera HTBasic emulator
(including the free trial version) using this modified version:
http://www.ke5fx.com/3048A_X01.zip .  (I'm not the author but I can probably
help you get it running if you have any trouble, since I've used it
heavily.)

-- john, KE5FX