Table of Contents
Advertisement
Audio problems
Hum on analogue input
There is no reason for the 568.2 to produce hum on the
analogue input.
Check the source equipment. Disconnect each source in turn.
If the hum originates from a ground loop, an antenna or cable
supply may be the cause. In this case an antenna-lead isolator
should be fitted.
If the 568.2 seems to be the cause of hum consult your
dealer.
There is radio interference
The 568.2 is a digital audio and computing device which has
been designed to very high standards of electromagnetic
compatibility.
If this equipment does cause or suffer from interference to/from
radio or television reception then the following measures should
be tried:
Reorient the receiving aerial (or antenna) or route the antenna
cable of the receiver as far as possible from the 568.2 and its
cabling.
Ensure that the receiver uses well-screened antenna cable.
Relocate the receiver with respect to the 568.2.
Connect the receiver and this product to different AC outlets.
If the problem persists contact your dealer.
Audible hiss at high volume settings
The input dynamic range of most current recordings is at
maximum 16 bit. The reason for this is that currently CD, DVD,
and LaserDisc use a 16-bit standard although DVD can support
up to 24-bits. The analogue sources you have cannot achieve
this kind of range. For comparison, analogue sources are likely
to be of the order of:
VCR, 12 bits.
FM radio, 13 bits.
Reel to reel tape, 13 bits.
Cassette tape, 12 bits.
LP, 11 bits.
Note: There may be a difference between the dynamic range of
the source channel when it is operating, and the noise you hear
in standby. For example, LP normally has lower noise when the
stylus is not in the groove; similarly tape will be quieter when it is
stopped. CD may also be quieter when it is stopped, producing
so called 'digital silence'.
111
Advertisement
Table of Contents
