6
4.1.2
Other Requirements
Short Circuit Protection at Output Stage
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.
Over Voltage Protection
In case a regulation loop in the unit gets defectives, the output
voltage shall not exceed more than 30% of the nominal value.
Thermal Protection
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.
Environmental Conditions
The unit should work b5 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.
4.1.3
Microphone/Guitar input/Wireless Microphone
For MIC driving circuit(between MIC port and ADC) tbd
Description
Specification
Gain (input 5mVrms at 1KHz)
20dB to 35dB
Frequency Response
20Hz to 20KHz +/- 1dB
Signal-to-Noise Ratio (input 5 mVrms at
1KHz)
70dB (A-Weighted) 10Hz - 22KHz BW
4.2
Bluetooth Section
4.2.1
General
Description
Specification
Bluetooth Standard
Version 4.2+ EDR,BLE
Frequency Band
2.402 – 2.480 GHz
Host Interface
UART
Profile Supported
SPP (Serial Port Profile)
A2DP (Advanced Audio Distribution Profile)
AVRCP (Audio/Video Remote Control Profile)
Audio Codec
SBC (Subband Codec)
Data Rate
Antenna
Certification
2.1Mbps (over the air)
300Kbps (over UART)
Internal
CE, FCC, BQE
