JVC CA-MXS5RMDB manual Sound Skip Guard Memory, MD limitations

Sound Skip Guard Memory

The biggest weakness of discs is their susceptibility to vibration. The “Sound Skip Guard Memory” has been developed to cope with this weakness.

With this function, a few seconds of signals read by the optical read head from the MD are first stored in memory before being reproduced as audio signals. Thus, even when vibration or shock interrupts signals being read, these stored signals can continue to reproduce sounds for the few seconds. Thus, the user will enjoy uninterrupted music.

Normally.... When “vibrated”....

MD limitations

The MD records data in an original format that differs from that of conventional cassette tapes or DATs. Since there are some limitations with this recording format, the following types of symptoms may occur. These symptoms are not malfunctions.

Symptoms	Cause
“DISC FULL” appears, even though there is still enough	There is a maximum number of tracks which can be
remaining time on an MD.	recorded, regardless of recording time. More than 254
	tracks cannot be recorded on an MD.
“DISC FULL” appears, even though the number of tracks	• Repeating erasure and recording on the same MD creates
and recording time do not reach the limit.	many blank portions sparsely on the MD. When record-
	ing on such an MD, a track is recorded on these blank
	portions sparsely. If a track is divided and recorded into
The JOIN function sometimes does not work.
	so many portions, “DISC FULL” appears.
	• If a divided portion of less than 8 seconds is made while
The remaining time on the MD does not increase even
	a track is recorded on the MD, that track cannot be
when tracks are erased.
	joined to another track using the JOIN function. Further-
	more, if that track is erased, the remaining time of the
The sound drops out during fast forward or fast reverse.	MD may not increase exactly by the erased amount.
	• If a track has been divided into many portions while
	being recorded on the MD, sounds will drop out while
	fast forwarding or reversing such an MD.
The amount of recorded time on the MD added to the	You cannot record on a blank portion of less than 2 seconds
amount of remaining time is shorter than the MD’s total	in the MD. For this reason, the actual recording time of
possible recording time.	discs may become shorter.

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