Tyco Electronics P5200 사용자 설명서

87 

This section describes the primary function of the button and knob controls. Other functions associated 
with these controls are detailed in later sections. 

Applies power to and adjusts the receiver’s volume. Rotating the control 
clockwise applies power to the radio. A single alert tone (if enabled through 
programming) indicates the radio is operational. 

Rotating the control clockwise increases the volume level. Minimum volume 
levels may be programmed into the radio to prevent missed calls due to a low 
volume setting. While adjusting the volume, the display will momentarily 
indicate the volume level (i.e. VOL=40). The volume range is from a minimum 
programmed level of zero (displayed as OFF in the display) up to 40, which is 
the loudest level.

 

Selects systems or group/channels (depending on programming). This is a 16-
position rotary knob.  

Note: A mechanical stop, which can limit the positions accessed, is shipped with 
the radio but must be installed. To install the mechanical stop, remove the 
channel knob, loosen the set screw on the channel knob metal base (using a 
1.27mm hex wrench), and remove the channel knob metal base. Replace the 16 
channel ring with the channel stop ring located at the desired channel. Reinstall 
the channel knob metal base, tighten the set screw, and reinstall the channel 
knob. 

Automatically selects the pre-programmed Group/System by pressing and 
holding for a programmed duration. It can also be used to declare an emergency 
by pressing and holding for a programmed duration. The button must be pre-
programmed for either operation, but not both. 

Push-To-Talk must be pressed before voice transmission begins. In trunked mode 
the radio’s ID is transmitted upon depression of the PTT button. (Refer to Figure
10-1.) 

Unsquelches the receiver and allows channel monitoring prior to transmission. 
Momentarily removes the Channel Guard decoding from the channel. 

Activates one of a number of programmable software options selected during PC 
programming. Programmable options include hi/low power settings, keypad lock, 
LCD contrast, LCD and keypad back lighting.