Other Requirements; Microphone/Guitar Input - JBL PARTY BOX 100 Service Manual

Function Crosstalk
Dynamic range
Input Impedance
Residual Noise
DC Offset
Damping Factor
Signal Sensing(ATO) at 1 kHz

4.1.2 Other Requirements

Short Circuit Protection at Output Stage
Over Voltage Protection
Thermal Protection
Environmental Conditions

4.1.3 Microphone/Guitar input

Mic/Guitar input to speaker,set potentiometer to Factory Level(1/4), unless otherwise specified.
Description
Input Sensitivity
Input Overload
Frequency Response (Output Power:-3dB
ROP)
75dB@100Hz
70dB @1KHz
65dB @10KHz
80dB@1KHz
> 4 Kohm
1.2mV rms
<30mV
>8
Analog: <5mV ,Typ. 3mV
Digital : < -70dBF
The amplifier should be protected so that no functional failure
occurs when it is operated with a short across its output stage
for 2 minutes. The amplifier should recover after removing the
short condition.
In case a regulation loop in the unit gets defectives, the output
voltage shall not exceed more than 30% of the nominal value.
There should not be any breakdown or activation of any
protection circuit during the entire thermal profile test. Refers to
the Thermal Profile test stated in Reliability Test Plan for
Multimedia Powered Speaker System.
The unit should work between +5°C till 45°C under ambient
temperature.
The unit should not get damaged within the temperature range
of +5°C till 60°C ambient temperature.
Specification
Mic : 20mV +/- 10%, Guitar : 100mV +/- 10%; fine-tune
potentiometer to meet requirement.
Mic : 489mV, Guitar : 1228mV;set potentiometer to Min
Mic : 50Hz~14kHz, Guitar : 50Hz~20kHz,limit -3dB