So I'm not sure what to make of these results.
First, a DC battery test with a D cell battery. The packaging says 1.5V; I have no idea how loose D cell battery tolerances are.
View attachment 83831
6.7% off spec. Is it the meter or the battery? No idea...
Moving on the to the calibration tape.
View attachment 83832
The default reference fluxivity for the PR99 MK II is 250 nWB/m = 0 VU
So it's expected that a 355 nWb/m tape gives this result for a 1 kHz tone.
View attachment 83833
Looks like the left channel is about 0.5 dB too low.
When measuring the 1 kHz test tone at 355 nWb/m = +3 VU, we get this output at the XLR line out jacks, in CAL (calibrated / fixed) mode:
View attachment 83834
So the next part is where my math is making me less than confident.
At 0 VU on the meter, the output should be +4 dBU at the XLR jacks, which = 1.23 VAC, I think.
So +3 dB on the VU meter should be.....+7 dBU, which = 2.24 VAC??
Is that math correct?
If so, either the output is a little hot, the meter is off by .01V, or my measuring is doing something wrong.
Or my math is wrong.