LBA DAS Specifications              RHF     2/3/98
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Summary
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A twin channel, wideband, variable bandwidth digital IF system with integral
data encoders/formatters for AT and VLBA correlators and S2 digital recorder.

Each channel
	Input Bandwidth		:	64MHz
	Input Range			:	0.1-192MHz
	AGC Range			:	12dB
	Digitisation		:	8-bit @ 128MHz
	Auxiliary Input		:	8 or 4-bit baseband @ 128MHz

	Output Bandwidth
		Single Passband	:	64, 32, 16,..., 0.0625MHz
		Dual Passbands	:	2*16, 2*8,..., 2*0.0625MHz
	Tuneable Bands		:	All bands <=16MHz
	Tuning Resolution	:	<=1Hz

	Output Format
		2-bit, 4-level	:	AT and VLBA code
		2-bit, 3-level	:	Multibeam code
	Correlator Port
		AT Format		:	32MHz BW max
		Multibeam		:	64MHz BW max
	Analog Monitors		:	Two DACs, 32MHz BW max
	Digital Monitor		:	10-bit, 16MHz BW max

	Features			:	Four families of filter responses
						:	Spectrum flipping, input and outputs
						:	Mixed bandwidth outputs
						:	Phase continuous frequency switching

	Readouts			:	AGC level
						:	2-bit coder levels
						:	PLL parameters
						:	Power Supply voltages
						:	Reference clock monitors

Common resources
	Input
						:	5MHz CW Frequency Reference
						:	1PPS Pulse Time Reference
						:	Auxiliary Sync (optional)
						:	Input Blank Signal (optional)

	Output				:	S2 Recorder Port, C1 format

	Control I/O			:	RS232C or RS485 Dataset Bus format

	Power				:	IEC connector, 120/240VAC (strapped)


Software (provided)		:	Needs DOS or Linux OS, one async serial port

Packaging				:	19" rack-mount module bin, 5U high



Filter Characteristics
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t.b.a.

Input Signal Levels
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t.b.a.

Output Signal Levels
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t.b.a.

I/O Data Formats
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t.b.a.

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								23/02/98