Tyco Electronics M/A-Com P5300 Manual De Usuario

32 

Once an OpenSky system has been selected from the available systems on your P5300 series portable 
radio, the characteristics described in the following sections will govern operation. 

The P5300 portable radio features two rotary control knobs, an emergency button, and a dual-position 
A/B switch located on the top of the radio.  Refer to Figure 7-2: Top View.  The Push-To-Talk (PTT) 
button and two option buttons are located to the left side of the radio keypad, see Figure 7-3: Side View.  
The front mounted keypad of the P5370 “System” model has 15 buttons and the P5350 “Scan” model has 
six buttons.  Refer to Figure 7-5 and Figure 7-4, respectively.  

The function of the button and knob controls will vary depending on the mode of operation. The primary 
functions of the button and knob controls when in the OpenSky mode of operation are listed in the 
following paragraphs.  

Applies power to the radio and adjusts audio 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. While adjusting the 
volume the display will momentarily indicate the volume level (i.e.

 

VOL=31). The 

volume range is from a minimum programmed level of zero

  (

displayed as

 

MUTE

 

in 

the display) up to 40, which is the loudest level.

 

Used to select voice groups when operating within an OpenSky system. This is a 16-
position rotary knob.  

A mechanical stop, which can limit the number of positions accessed, is shipped 
with the radio but must be installed. To install the mechanical stop, remove the 
voice group selection knob, loosen the set screw on the voice group selection knob
metal base (using a 1.27mm hex wrench), and remove the voice group selection 
knob metal base. Replace the 16 channel ring with the channel stop ring located at 
the desired channel. Re-install the voice group selection knob metal base, tighten the 
set screw, and re-install the voice group selection knob.  

Press to declare an emergency. Press and hold for three seconds to clear emergency. 

The Push-To-Talk button must be pressed before voice transmission begins. 

Scrolls UP or DOWN thru available items within a sub-menu, such as available talk 
groups, pre-programmed speed dial numbers, canned alert messages, etc. 

The keys on the keypad have special functions and are labeled using a symbol or abbreviated word 
describing its primary function. Numeric entry is a secondary function of the keys. Each key is described 
in Table 8-1.