UNI-T UT-M14 User Manual page 7

power amplifier outputs a reverse phase 180°signal from the input signal; Press
this key again, the indicator will be extinguished, it indicates the power amplifier
outputs an in-phase signal that is the same as the input signal.
ON: Press ON key, the indicator will steady illuminated, it indicates channel
output of the power amplifier is enabled; press ON key, the indicator will be
extinguished, it indicates channel output of the power amplifier is disabled; If the
indicator is blinking, it indicates the channel output overcurrent protection or
output overvoltage protection
POWER: If POWER indicator is steady illuminated, it indicates the power is
connected; if the indicator is blinking, it indicates the interior temperature of power
amplifier is high, so the channel output cannot be open. It should wait the interior
temperature decrease to the normal range, and the indicator will turn to steady
illuminated. Then then channel output can be open.
2.4.2 Notice for Input / Output
If input impedance of the instrument is Zi = 50 kΩ, then input range is -12V~ +12V
when voltage gain is x 1; input range is -1.25V~ +1.25V when voltage gain is x 10.
If input signal is over the specified range, it may cause damage to the instrument
and dangerous. If output impedance of the instrument is Zo< 2Ω, then the output
range is -12V~ +12V; the actual output voltage can up to±12.5V, so the total
harmonic distortion of wave will increased.
Rear Panel
2.4.3 Power Input End
Please use the power adapter provided in the attachment to connect the power
input end. The power supply is 9V/ 4000mA DC signal. Do not use other output
adapters to power UT-M14. Otherwise, the performance of the device may be
degraded or permanently damaged.