VXI SM8000 Relay Optical Module’s Data Attenuation Level, Register 02 thru 08 - Read and Write

VXI Technology, Inc.

	Relay (Optical Module’s Data (Attenuation Level))
	Register 02 thru 08 – Read and Write
ADDR	Plug-In LA+0x002 – 0x008
		The SM8000 can alternatively drive up to 4 optical multi switch or
		attenuator modules. Module one is addressed by writing a 16-bit
		word to address LA+0x002; module two is controlled by writing
		to address LA+0x004 and so on.
		When controlling the multi switch modules, data bits D4 (MSB)-
		D0 (LSB) are used to pass the channel selection data directly to
		the optical module. See the configuration information for the
	16 Bit Data Word to	specific optical module that is installed in the SM8000.
D15-D0	be sent to Optical	For multi switch modules, these addresses are both read and write.
	Multi Switch or
	Attenuator	When controlling attenuator modules D15 (MSB)-D0 (LSB) are
		used to pass the 16 bit control word to the optical module.
		Writing to this register initiates the transfer of data to the optical
		module.
		For attenuator modules, these addresses are write only.
		See typical Optical Attenuator control example.

	Relay (Optical Module’s Data (Attenuation Level))
		Register 0A thru 0C – Read
ADDR	Plug-In LA+0x00A – 0x00C
			Queries of the optical attenuator module may be acquired through
			reading of these registers.
			When querying attenuator modules D15 (MSB) - D0 (LSB) are
			used to read the three 8-bit data bytes from the optical module.
	16 Bit Data Word to		Once the optical module has been queried, these registers may be
			read to receive the data retrieved from the optical module. Address
D15-D0	be read back from
			0C will read back the most significant byte, and the address 0A
	Optical Attenuator
			will read back the middle and least significant byte.
			Depending on the query command (see Attenuator Command Set)
			a predefined byte count will be received back from the optical
			module.
			See typical Optical Attenuator control example.

56 SM8000 Series Programming