HP 432A as an optical detector
Christopher Bartram <cbartram@...>
I was intrigued by Sam's observation that he could see a flash lamp with his
432. I've just tried shining a laser (which as a narrowband optical source
won't have the IR radiation of an incandescent bulb, suggested by Geoff...)
into my R486 26 - 40GHz sensor. I can detect the laser, and making a very
rough head calculation, the calibration is probably not that far out..!