WH/14/11/96
DATCHA specifications (collected from several sources)
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1. High Voltage Channels.
	HV channels		2 channels/chamber
				3 chambers means 3 x 2 = 6 HV channels.
				4 channel/CAN node (2 CAN nodes needed)
				2 CAN nodes/'QUAD_HV"-module (1 module needed)
   Specification per channel
	range			0 to 4095 Volt (set thru 12-bits DAC)
	ramping
		type		linear
		speed		software selectable in seconds (1-65535 sec)
	voltage monitoring	10-bits ADC; voltage automatically switched
				off by software	in case of exceeding settable
				range
	noise			?
	ripple			?
	.... 

2. Threshold settings.
	BIMUX threshold		0 to 250 mV
	2 x threshold / chamber

3. Temperature measurement.
	8 x wired sensors on tube, LM35 & cables.
	10 bits range		0 to 4.096 V
	temperature sensors	100 mV/C
	range 		   	0C to 40C

4. Masking noisy wires with BST register (32-bits BST-reg per BIMUX)
	BOL			16x32-bit register
	BML			14x32-bit register
	BIL			10x32-bit register
	individual masking per wire via (software) JTAG interface.

5. t0 ('tee-zero') calibration.
	select tube column [0:7]
	pulse toggle		minimum pulse width 3 microseconds
				triggered by leading edge
	calibration tables with timing differences channels