Справочник Пользователя для Bosch Security Systems Inc. H221

    
 
REV-H Users Manual   

Page 3 

 
Quick set cont’d. 
 
 9.  Press and hold the set and down arrows at the same time for 3  
      seconds and release to go to the next screen function. 
 
      The next screen is the audio (microphone) level (attenuator)   
      screen. Setting the level correctly depends on the microphone    
      used and the person using the microphone. Setting the attenuator to  
      “0”db is the same as setting a control to maximum gain. 
      Setting the attenuator to –42 db is the same as setting a control to 
      minimum gain. Each step of the attenuator equals 3 db. 
 
      Setting the attenuator for the maximum Audio Meter reading on the  
      receiver without peak distortion will produce the best signal to noise  
      ratio. 
        
 
10. The next screen is RF Power. The Transmit Power (RF) is shipped set to  
       “Lo” for use with multiple frequency systems and the best battery life.  
       “Hi power can be selected for longer distances or to suppress noise or 
       interference. The nominal power in Hi is 50 milliwatts. 
 
11.  When power off is required, simply place the power Off-On switch in 

the OFF position. The display will then delay slightly to allow the 
receiver to shut down quietly.