Wulfsberg Electronics Division CVC-151 用户手册

 

Page 46 

Publication No. 150-047012 

Dec 2005 

Rev. D 

1.  The FREQUENCY SELECTOR knobs tune the radio receiver directly.  The display actually shows the 

frequencies to which the receiver is tuned.  In addition to rotation of the FREQUENCY SELECTOR KNOBS, 
the receiver may be tuned by an external ARINC 429 digital bus. 

2.  Display intensity and panel lighting are controlled by external dimmer controls. 

3.  If the signal to which the receiver is tuned is lost for longer than 5 seconds, the display pointers will park at 

90

°. 

4.  The FREQUENCY SELECTOR KNOBS rotate continuously through all detents without end stops.  After the 

highest number is displayed, the next detent clockwise will cause the lowest number to be displayed. 

5.  If the display is not functioning, the system frequency can be established as follows:  Press the transfer 

button for 7 seconds.  The system will then be at 100 kHz (for BCD interface it will be 190 kHz) and it will be 
in active tuning mode.  Rotating the large frequency selector clockwise will increase the frequency in 100 
kHz steps.  Rotating the small knob clockwise will increase the frequency in 1 kHz steps. 

8.  Frequencies selected between 100 kHz to 189 kHz and 1861 kHz to 1899 kHz are invalid and will cause the 

display to blink off and on. (except with BCD Interface) 

9.  Pressing and holding the left pushbutton (PWR) for more than 1 second will trigger the system to shutdown.  

A warning screen will display a countdown.  Releasing the PWR button before the count has expired will 
return the unit to the display screen active prior to initiating the shutdown. 

Should the system become unresponsive, a hardware failsafe shutdown can be initiated.  Under this 
circumstance, press and hold the PWR button for 12-15 seconds. There is no indication other than actual 
system shutdown and an audible click.