Exact item shown, Noisecom model NC1107A 100 Hz to 100 MHz noise generator with typed label held on with tape which I think has an error. The label says 15VDC and 160ma current draw, so I first tested this at 15VDC - you can see that the current draw is 58ma (far from 160 ma) and the noise power is quite a bit less than calculated from the  the specification. I first worried that my analyzer might be out of calibration so you can see in the photos that I tested it with the 50 MHz calibration signal from my power meter, that signal is 0 dBm and is used to calibrate the power sensors.  The Sectrum Analyzer (SA) was 1/2 dB low, much less than the power level difference from the spec.   Then I looked at the spec sheet which says that package 1 devices (which includes this one) run from 28VDC, and that the power drops by 1/4 dB for each 1% of voltage reduction.  I looked at the inside of the unit, and there is no regulator, and the power reduction is about what would be predicted by dropping from 28V to 15 V.  To see if the spec sheet might be right and the typed label be wrong, I slowly increased the voltage from 15 to 28V, logging the voltage, current and noise level in a 100Khz RBW, as you can see in the hand written note.  The result is .... yes, wait for it .... the spec sheet is right, and at 28V the power is almost at the ideal value (a couple of dB low, which might be cable loss).  I will cross out the 15V on the label on the unit so the next owner doesn't make the same mistake.  My paper log is included in the listing and the paper copy of the data sheet.

Note to me: right side back of garage, plastic bin number 1

I normally ship within 24 hours of your order, but the post office does not always initiate tracking when I put the packages in the drop off box.  

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