[time-nuts] CSAC vs NAC1

[jimlux]

Here's a quick summary of the datasheet performance between the 
Vectron/Accubeat NAC1 and the MicroSemi CSAC.  Bear in mind that 
Microsemi now has a wider temp range (i'm using the old rev J datasheet)

CSAC is 1/10th the power
NAC1 has a better crystal, so the phase noise is better
the "atomic" part is comparable in performane


Parameter	NAC1		CSAC
Aging		3E-10/mo	9E-10
		1E-9/yr		10E-9

ADEV		2E-11 @ 100sec	2.5E-11
		8E-11 @ 10	8E-11
		2E-10 @ 1 sec	2.5E-10

phase noise
		-86 @ 10	-70
		-120 @ 100	-113
		-138 @ 1000	-128
		-143 @ 10k	-135
		-148 @ 100k	-140
		-150	floor

max chg		1E-9 (-20 to 65) 5E-10  (-10 to 35)

pwr		1.2W op		0.12
		1.8W warm	0.14