User Manual

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5.26.4 Output power
The expression of power for the power amplifier is
P = V
2
/ R
Where, P is the output power(the unit is W), V is the output virtual amplitude value (the unit
is Vrms), R is the load resistance（the unit is Ω） .
The maximum output amplitude can reach 10Vrms and the minimum load resistance can be
2Ω. Besides, the higher the temperature of the working environment, the larger is the
frequency of the output signal and the greater the distortion of the output signal. Usually,
the maximum output power can reach 8W(8Ω) or 2W(50Ω).
5.26.5 Output protection
The power amplifier is of short circuit protection function and over heat protection. Usually it
is unable to be destroyed but long time output short circuit should be avoided. The
frequency, amplitude and loading should be best within the limitation, two of which,
especially, cannot get the limitation at the same time in case that the power amplifier is
damaged.
6. Maintenance & fuse replacement
In the case of an electrical defect the melting fuse on the rear side (6) of the device may
trigger.
If this is the case, use only a fuse with the same ratings (T 3A/250V 5x20mm) for
replacement.
In normal operation mode the fuse should never trigger without any reasons, so make sure
the electrical defect is eliminated before restarting the device.
Note: The repair must be performed only by qualified personnel.