Teac FD-55 Series - 219

explained simple model. In the case of LI < L2, shown in Fig.206, the
allowable cable length is remarkably shortened.
Enough care is required for such a case.
For the system design, observe the input/output signal waveforms both
at host and FDD sides carefully assuming the cable connections possible,
and determine the maximum cable length which enables the interface
receivers of both sides to receive the signals correctly. The shorter
the total cable length, the better for the system performance.
Therefore, it is recommended to select the appropriate length of cable
for the system construction.
Though the length is different depending on types of cable and types
of host side receiver, the maximum cable length in a typical daisy
chain connection is as follows:
(Refer to item 2-2-3-1).
Terminator resistor 3300
Terminator resistor lKn
oe power
3m,Max.
1.5m,Max.
Power cable
+12V,+5V L2
~--~~------~~---------+----~~----~----------~~
FDD
control
unit
Signal cable
Fundamentally, only the final
FDD has a resistor network for
terminator.
Note:Omark in the FDD shows the FDD address designated by straps DSO ~ OS3.
(Fig.206) Typical connecting scheme for up to 4 FDDs
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