Sam Ash Music Corporation AG300 User Manual

 

 

 

 

 

No   Item  

Details  

Adjustment Point  

Settings/Standards  

Notes  

1  

Initial Setting  

Set PCB and channel  

Channel setting is depend on 
the IR signal from the RX 
AR300 

PCB power switch = ON  

 

2  

Power supply input   

Supply power at battery 
terminal.  

 1.5V 

 

 

3  

Consumption Current 
Confirmation  

Consumption current at 
1.5V.  

 

120mA 

There is no signal input 

4  

Internal Voltage 
Confirmation  

Ouput voltage of DC-DC 
Converter.  

 3.3V 

 

 

5  

Frequency Adjustment  

Adjust each channel to the 
specified frequency 
(639.025MHz – 
647.000MHz, 25KHz 
Interval).  

VC2  

Specified frequency 
+/-5kHz.  

 

6  

RF Output Level 
Adjustment 

Adjust the output RF level  

VR1 

+2.5mW - +3.5mW  

 

7  

Spurious Level 
Confirmation  

Check by spectrum 
analyzer.  

 

Less than 1uW.  

 

8  

AF Amplifier Adjustment  

Adjust the audio input level 
to ensure deviation and 
distortion comply with the 
specification 

VR2  

 

9  

Deviation Adjustment  

Adjust the deviation less 
than 40kHz.  

VC1, VR3 

Less than 40KHz 

When input signal rise 
to input 1kHz THD4% 

10  

Distortion Ratio 
Confirmation  

Adjust by audio output from 
receiver.  

 

Less than 2%  

1kHz DEV= 20kHz and 
both of 6.7kHz on the 
other hand 

11  

Frequency Response 
Confirmation  

Adjust by audio output from 
receiver.  

 

+/-3.5dB over 50Hz to 15kHz 

Audio input level at 
-50dBv