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CRaTER Instrument Serial Number Decoder
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The Grand Plan:
S/N 01->07	Flight Hardware
S/N 08->	Engineering Hardware
S/N 31<-	Software Simulators

S/N	Date	Status
---	-----	---------------------------------------------------
08		First engineering spin of digital PC board
		Actel Socketed, HVBias supply on vector board
		Lab regulated power supplies; FPGA rev 1

		The detectors are the first Micron build, 3 thin and 3 thick
		selected from the delivery of 6 each.  They were burned in, but
		not subjected to a 21 day stability test.  The leakage of the
		thick detectors was reported as 1.5ua, 50% over spec.
		      D1:     thin	  s/n D01-2452-2A
		      D3:		  s/n D04-2452-5A
		      D5:		  s/n D02-2452-2B
		      D2:     thick	  s/n E03-2448-17B
		      D4:		  s/n E06-2448-11B
		      D6:		  s/n E05-2448-11A

		Telescope is not the first, but the second mechanical design,
		keeping the detectors out of the load path.  It is intended for
		vibration testing to validate the flight mechanical design.

		Analog board is the first spin of the PC layout, but should
		functionally be identical to the second.  Some minor mods have
		been made to reduce noise.

		Digital board is the first spin of the PC layout.  The LLD
		housekeeping does not report negative voltages, nor is 28VDC bus
		current or voltage reported.  Similarly, power supply and
		bulkhead temperatures are unreported.  The peak stretcher input
		diodes were added to the original design as well as a transition
		buffer for the PWM trains which generate the CAL and LLD voltage
		levels. 


09		First flight spin fo digital PC board with commercial parts
		Sockets for PH300 peak stretchers
		Engineering analog PC board with commercial parts
		Engineering telescope assembly from s/n 8
		Engineering grade regulated power supplies
		All housekeeping functional
		Engineering unit housing
	1/1/07	Fixed problem with low level counts (PH300 feature)

10	3/13/07	Promoted from S/N 9; unchanged digital board
		First flight spin of analog PC board with engineering parts
		Engineering telescope assembly with thin detector gain set
		   to 300MeV full scale; thick still at 100MeV full scale.
		FPGA S/N 3: changed cal pulse shape to make amplitude
		   independent of rate.

11	3/26/07	The FLATSAT model to be delivered to GSFC
		This unit omits peak streatchers, HV bias, and the
		analog board(!). Custom wirewrap circuitry turns the
		ecal signals into data; all analog telemetry works.

31		See the PERL programs primary-packet, ss-packet, and
		house-packet in the GSE-software directory which can
		generate software-controlled data streams.