NPI SEC-05LX, Руководство по эксплуатации

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Synchronization of Two or More SEC Amplifier Systems
For recordings with two or more switched mode amplifiers in the same preparation it is
necessary to synchronize the current injection and voltage recording timing protocols to avoid
artifacts and excessive noise. This is done by the SYNCHRONIZATION inputs and outputs at
the rear panel of the instruments based on a "master-slave" arrangement.
The master instrument provides the clock frequency (from which the switching frequency is
generated internally) for the slave instruments.
All SEC amplifiers prepared for synchronized operation have a BNC connector marked
MASTER OUT. This output is connected to the SLAVE IN BNC connector slave instrument(s).
Up to four SEC amplifiers can be synchronized, one SEC acting as master and three SEC
operating as slaves.
The position of the toggle switch marked INT. MODE / SYNC. MODE decides whether the
amplifier operates as master or as slave. In the position INT. MODE the switching frequency is
generated internally, and the amplifier operates as master or as stand-alone instrument. In the
position SYNC. MODE the amplifier is used with the clock frequency of the MASTER
instrument, i.e. it works as slave in both switched modes (VC / CC). In this case current injection
and sampling of current and potential signals are synchronous. Therefore, all artifacts are
suppressed.
Warning : If the SYNCHRONIZATION switch is in the SYNC. MODE position and no signal is
connected to the SLAVE IN connector the switched modes of the amplifier (VC and CC) are not
working (no switching frequency!).