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transmit when a carrier is present. Instead, the radio will generate a continuous low-pitched 

tone while PTT switch is pressed. Release the PTT switch and wait for the channel to be clear 
of activity. 

 
If CTCSS or Digital Code Squelch (DCS) Lockout has been programmed on a channel, the 

radio can transmit only when there is no carrier being received or when the carrier being 
received includes the correct CTCSS tone or DCS code. 

 

Time-Out Timer 

 
If the selected channel has been programmed for Time-Out Timer, you must limit the length of 
each transmission, While transmitting, a beep will sound 10 seconds before time-out. 

Another beep will sound just before the  deadline; The TX indicator will disappear the 
transmission will cease soon thereafter. To resume transmitting, you must release the PTT 

switch and wait for the “penalty timer “ to expire (if you press the PTT switch before this timer 
expires, the timer restarts, and you will have to wait another “penalty” period) 

 
 

 
 

 

Summary of Contents for F-25U

Page 1: ...F 25V F 25U F 50V F 45U Operating Manual...

Page 2: ...AND MOBILE RADIO Only qualified technicians are allowed to repair this product Do not operate the radio without a proper antenna attached As this may damage the radio and may also cause to exceed FCC...

Page 3: ...artment that contains an LP gas container or its fitting No changes or adjustments shall be made to the equipment except by an authorized or certified electronic technician Using your radio to send pe...

Page 4: ...ly configured radio 1 VOL PWR Knob Turn this control clockwise to turn the radio on and increase the volume Turn it counterclockwise into the click stop to the radio off 2 BUSY TX Indicator Indicate t...

Page 5: ...error messages 5 Microphone Jack Connect the microphone plug to this jack 6 P C Buttons Programmable Function Buttons These buttons can be set up for the special applications such as High Low power s...

Page 6: ...wer connection 3 External Speaker Jack An external loudspeaker may be connected to this 2 contact 3 5mm mini phone jack Caution Do not connect either wire of this line to ground and be certain that th...

Page 7: ...ess the assigned PF button to Up down Channel The display can show channel numbers or channel labels Technician along programs the display mode and channel labels Transmitting Press PF button which is...

Page 8: ...includes the correct CTCSS tone or DCS code Time Out Timer If the selected channel has been programmed for Time Out Timer you must limit the length of each transmission While transmitting a beep will...

Page 9: ...d noise unmute the audio the BUSY TX indicator will grow green SCAN 1 4 The Scanning feature is used to monitor multiple channel programmed into the transceiver While scanning transceiver will check e...

Page 10: ...rgency feature which may be useful if you have someone monitoring on the same frequency as your transceiver s channel Press the assigned PF button to initiate an emergency call For future detail conta...

Page 11: ...button for 2 second to lock the front panel buttons this can be enabled to prevent radio setting from being disturbed MEMO CH 1 2 Press the assigned PF button to recall the programmed channel directl...

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