A good old HP 8590A spectrum analyzer, which was picked up from eBay for parts or repair. It turned out to have a bad mixer in the first converter. A matched pair of schottky diodes was dead. A replacement was found and installed. The analyzer seems to be back in business. Perhaps, it will need some adjustments though.
Forum:
www.eevblog.com...
Service manual:
www.keysight.co...
Avago (Broadcom)HSMS-28xx datasheet:
www.mouser.com/...[1]-908864.pdf
Diodes on Mouser:
HSMS-2802 - the ones I used:
www.mouser.com/...
HSMS-2812 - the ones I think I should have used:
www.mouser.com/...
Негізгі бет #43 - HP 8590A spectrum analyzer repair - part 1 of 3
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