Am 23.02.2025 um 08:51 schrieb DF6NA Rainer:
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HP 83020A 2-26,5GHz - 30dB gain - 30dBm out
Am 22.02.2025 um 23:54 schrieb David Feldman via groups.io:
Hi All,
Today (22 Feb) had access to the HP 8670B unit that started this conversation. I've attached three internal photos with close-up of any identifying information I could see.
Did some RF testing at 2, 6, 10, 14 and 18 GHz. It appears to have 30-40 dB of gain and 1-3 watts output power. As the test set-up was not particularly friendly (an ancient Wiltron sweeper and Narda 7000A operating in power meter mode that was about +/- 1 dB off HP 8484A), once the (much) higher than expected max output power was observed, we switched to a Narda 30 dB high power attenuator (intended only to 6 GHz), after a cursory check indicated that it just got lossier as it was operated well above it's specification.
Anyway, there was no indication of how the internal potentiometers would need to be adjusted, nor how the unit uses those, but at least for now at? 6 GHz it seems to be usable.
