FRS420 – User Instruction Guide – Content Draft
TriSquare Communications
Draft for content only – customer to define layout and additional graphics
Page 4
will pause on that channel until the channel is
clear. Then after a 4 second delay, the unit will
continue scanning. Pressing
PTT
while the
scan is paused on a channel will allow you to
transmit on that channel.
To turn on channel scanning:
Press and hold either the
Up
or
Down
button
until the SCAN icon on the display is shown.
The channel number on the display will be
rapidly cycling through the channels.
To turn off channel scanning:
Press and hold the
Up
or
Down
button until the
SCAN icon on the display is off.
LCD Backlight
The LCD back light will automatically be
turned on with any key press except
PTT
and
call
. The LCD display will be illuminated for 5
seconds before turning off.
Auto Squelch Feature
The FRS420 radio is equipped with an
automatic squelch system which shuts off weak
transmissions and unwanted noise due to
terrain conditions or if you have reached your
range limit.
To temporarily disable the Auto Squelch and
listen to the selected channel, rapidly press the
PTT
button twice. The channel will remain
open for 4 seconds before the Auto Squelch re-
engages or you repeat the double
PTT
key
press.
Automatic Power Save Feature
Your radio has a unique circuit designed to
dramatically extend the life of the batteries. If
there is no transmission within 5 seconds, your
radio switches to the Power Save mode. The
radio is still able to receive transmissions in
this mode.
Specifications
Description
Channels
14
CTCSS Codes
38 Sub-Audible Tones
Operating Frequency UHF 462.550-467.725 MHz
Power Source
3AA Alkaline Batteries or
custom NiMH Battery Pack
Output Power
500mW ERP maximum
Battery Life
45 Hours (5/5/90 duty cycle)
Channel Frequency Chart (Mhz)
CTCSS Chart (Hz)
Code
Frequency (Hz)
Code
Frequency (Hz)
Code
Frequency (Hz)
0
Disa bled
13
103.5
26
162.2
1
67.0
14
107.2
27
167.9
2
71.9
15
110.9
28
173.8
3
74.4
16
114.8
29
179.9
4
77.0
17
118.8
30
186.2
5
79.7
18
123.0
31
192.8
6
82.5
19
127.3
32
203.5
7
85.4
20
131.8
33
210.7
8
88.5
21
136.5
34
218.1
9
91.5
22
141.3
35
225.7
10
94.8
23
146.2
36
233.6
11
97.4
24
151.4
37
241.8
12
100.0
25
156.7
38
250.3
C h a n n e l
F r e q u e n c y C h a n n e l
F r e q u e n c y
1
4 6 2 . 5 6 2 5
8
4 6 7 . 5 6 2 5
2
4 6 2 . 5 8 7 5
9
4 6 7 . 5 8 7 5
3
4 6 2 . 6 1 2 5
1 0
4 6 7 . 6 1 2 5
4
4 6 2 . 6 3 7 5
1 1
4 6 7 . 6 3 7 5
5
4 6 2 . 6 6 2 5
1 2
4 6 7 . 6 6 2 5
6
4 6 2 . 6 8 7 5
1 3
4 6 7 .6 8 7 5
7
4 6 2 . 7 1 2 5
1 4
4 6 7 . 7 1 2 5
