modified frequency modulation การใช้

• Manchester coding and modified frequency modulation have a bit rate equal to 1 / 2 the baud.
• The command data rate is 423.75 kbit / s encoded using Modified Frequency Modulation ( MFM ).
• The disks were Modified Frequency Modulation ( MFM ) coded in 512-byte sectors, and were soft-sectored.
• It was quickly replaced by double density floppy drives using modified frequency modulation ( MFM ) or group code recording ( GCR ).
• Modified frequency modulation ( MFM ) controllers were the most common type in small computers, used for both floppy disk and hard disk drives.
• The interface with the drives is a NEC 765 DMA transfers and support for single density discs; they were formatted as double density using modified frequency modulation.
• BMC is also the original " frequency modulation " used on single-density floppy disks, before being replaced by " double-density " modified frequency modulation.
• Eventually Commodore gave in to disk format standardization, and made its last 5?inch drives, the 1571, compatible with Modified Frequency Modulation ( MFM ), to enable the Commodore 128 to work with CP / M disks from several vendors.
• A Modified Frequency Modulation or ( 1, 3 ) RLL encoding stores each data bit as two bits on tape, but since there is guaranteed to be one 0 ( non flux reversal ) bit between any 1 ( flux reversal ) bits then it is possible to store 6, 400 encoded bits per inch on the tape, or 3, 200 data bits per inch.