The design of the RNG has been tested according to the DIEHARD test. But EACH RNG is actually tested according tot the 8192 x 8 bit samples test. This is to ensure that each RNG is in perfect working order. It is not necessary to test eacht shipped RNG with the diehard test.
So, we cannot say that the Orion RNG that is sold has passed the DIEHARD test.
Reason?
"ORION's Random Number Generator consists of two independent analogue Zener diode based noise sources."
How can they know that the Zener diodes produce the same noise?
Fact:
They can't.
Of course, the issue of (non)calibration still stands.