[time-nuts] HP3048A Phase Noise Test System

John Miles jmiles at pop.net
Mon Mar 2 16:51:33 UTC 2009

Short answer: download an eval copy of TransEra HTBasic (purchasable for
about $1000 US/seat, usable for 30 minutes at a time otherwise).  Then unzip
a copy of the HP RMB software that's been tweaked to make it more compatible
with the emulator, at http://www.ke5fx.com/3048A_X01.zip .  Set up the
emulator according to the readme.txt file.  You can run the emulator with a
National Instruments GPIB board.  I don't know if it works with the HP
interfaces or not.

The docs for the 3048A system itself are at
http://www.hparchive.com/hp_equipment.htm , near the bottom of the table.

This is an arcane, patience-trying process, and not all functions and
features work properly.  But that's how you get to ~-180 dBc/Hz for free!

-- john, KE5FX

> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
> Behalf Of Martyn Smith
> Sent: Monday, March 02, 2009 5:06 AM
> To: time-nuts at febo.com
> Subject: [time-nuts] HP3048A Phase Noise Test System
> Hello All,
> I have a couple of HP3048A with option 301 phase noise test sets.
> I run the systems on HP Brio computers with a GPIB interface, running
> Windows 95.
> I bought the units as working systems and have no knowledge on the 3048A
> software and how it works.
> I want to upgrade the system using a laptop with a GPIB interface.
> Has anyone successfully done this?
> Would I need a special GPIB interface and how would I get the software to
> talk to the GPIB interface?
> Any help would be much appreciated.
> Best Regards
> Martyn
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