Author Topic: New (to me) HP3458A reference  (Read 5484 times)

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Offline VintageNut

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Re: New (to me) HP3458A reference
« Reply #25 on: November 13, 2016, 10:59:41 am »
Not a suitable one :) Lowest range is 20mV with P6245 probes.

10X probes are for high frequency cowboys. Use coax, change the probe multiplier setting to 1X and now you have 10X better flicker noise measurement capability.  I am certain you already knew that.

Your scope goes for $2k - $3k on ebay. It was a big deal in its day.

working instruments :Keithley 260,261,2750,7708, 2000 (calibrated), 2015, 236, 237, 238, 147, 220,  Rigol DG1032  PAR Model 128 Lock-In amplifier, Fluke 332A, Gen Res 4107 KVD, 4107D KVD, Fluke 731B X2 (calibrated), Fluke 5450A (calibrated)

Offline TiN

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Re: New (to me) HP3458A reference
« Reply #26 on: November 14, 2016, 05:37:15 am »
That trick does not work here, because scope has high-frequency custom TekConnect ports, not the usual BNC's. This means only DC coupling and only 50 Ohm input. YouTube | Have test gear documentation to share? Upload here! No size limits, firmware dumps and teardown photos welcome.

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