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Archive for December 29th, 2016

Fordham FG-801 Function Generator Recalibration

While I had the case open, I checked the FG-801’s calibration:

Fordham FG-801 Fn Gen - circuit board

Fordham FG-801 Fn Gen – circuit board

Look at all those parts!

The raw filtered DC power supplies run a bit high and the output voltages & frequencies were off by a little, but not too much after all these years.

Page 11 of the instruction manual gives the setup and calibration adjustments (clicky for more dots):

Fordham FG-801 Manual - Page 11

Fordham FG-801 Manual – Page 11

Page 12 gives some values that should be true:

Fordham FG-801 Manual - Page 12

Fordham FG-801 Manual – Page 12

For whatever reason, the manual isn’t available on The InterWebs, so here it is for your amusement:

Fordham FG-801 Sweep Function Generator – Instruction Manual.pdf

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