Agilent Technologies 35670-90066 manual Random Seek

	Internal Test Descriptions	Agilent 35670A
	Self-Test Descriptions
[ OFFSET ]	This test verifies that the analyzer can correct for dc offsets generated by the input circuits on
	the A1 Input assembly or A2 Input assemblies. In this test, the input circuits are connected to
	ground. For the A1 Input assembly’s channel 1, time record measurements are taken with the

signal routed through the 100 kHz anti-alias filter and through the 50 kHz anti-alias filter with the dc offset DAC set to 127, then to –127. For the A1 Input assembly’s channel 2, time record measurements are taken with the signal routed through the 50 kHz anti-alias filter with the dc offset DAC set to 127, then to –127. For the A2 Input assembly’s channel 1 or 2, time record measurements are taken with the signal routed through the 50 kHz anti-alias filter and through the 25 kHz anti-alias filter with the dc offset DAC set to 127, then to –127. For the A2 Input assembly’s channel 3 or 4, time record measurements are taken with the signal routed through the 25 kHz anti-alias filter with the dc offset DAC set to 127, then to –127.

[ QUICK CONF TEST ] This test calibrates the analyzer and checks the calibration limits. Any calibration errors are entered in the Test Log. See “Calibration Routine Description” earlier in this chapter for a description of the calibration routine.

[ RANDOM SEEK ]	This test verifies that the A100 Disk Drive assembly’s head can move to a random sector on the
	flexible disk. In this test, the disk controller on the A7 CPU assembly instructs the disk-drive
	head to move to a random record. This test requires a formatted flexible disk.
[ READ ]	This test verifies that the A100 Disk Drive assembly can read a flexible disk. In this test, the
	A7 CPU assembly’s disk controller instructs the Disk Drive assembly to read the current record
	on the flexible disk. While the current record is being read, the disk controller monitors the
	RDDATAn signal to verify the read operation. The current record is set by the [ SEEK RECORD
	] test. This test requires a formatted flexible disk.
[ READ/WRITE ]	This test verifies that the A100 Disk Drive assembly can read and write to a flexible disk. In
	this test, the A7 CPU assembly’s disk controller instructs the Disk Drive assembly to read the
	current record on the flexible disk. While the current record is being read, the disk controller
	monitors the RDDATAn signal to verify the read operation. The disk controller then instructs
	the Disk Drive assembly to write to the current record. While the current record is being
	written to, the disk controller monitors the WDATAn signal to verify the write operation. The
	current record is set by the [ SEEK SECTOR ] test. This test requires a formatted flexible disk that
	is not write protected.

[ READ/WRITE ALL ] This test verifies that the A100 Disk Drive assembly can read and write to all records of a flexible disk. In this test, the A7 CPU assembly’s disk controller instructs the Disk Drive assembly to read every available record on the flexible disk (excluding privileged tracks). While the flexible disk is being read, the disk controller monitors the RDDATAn signal to verify the read operation. The disk controller then instructs the Disk Drive assembly to write to every available record on the flexible disk (excluding privileged tracks). While the flexible disk is being written to, the disk controller monitors the WDATAn signal to verify the write operation. This test stops on the first error. The execution time for this test depends upon the size of the disk. For example, if there are no errors, this test takes approximately one hour for a double-sided, low-density disk. This test requires a formatted flexible disk that is not write protected.

[ RESTORE ]	This test verifies that the A100 Disk Drive assembly’s head can move away from track 0, then
	back to track 0. In this test, the A7 CPU assembly’s disk controller instructs the disk-drive
	head to move away from track 0, then back to track 0. The disk controller monitors the T00n
	signal to verify the move operation. This test requires a formatted flexible disk.

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