Becker AR 4201 User manual

Becker AR 4201 VHF Radio Guide
The Becker AR 4201 is a compact unit with many functions yet is easy to operate.
Basic Operation
Adjust volume using the volume knob. Turn fully counter clockwise to turn the unit off.
Squelch is preset so does not need to be adjusted manually. It can be manually turned off by
pressing the squelch button when receiving weak singals and is indicated by an ON or OFF on the
screen when pressed.
The LCD screen will show two frequencies. The top frequency (large numbers) is the active
frequency where radio signals are being transmitted and received. The bottom frequency (small
numbers) is the standby frequency that the pilot can change when selecting another one to use.
To change frequency use the MHZ and KHZ adjustment knobs to select the desired frequency on the
standby frequency and press the Frequency Toggle Button. This will swap the two over and now
make the desired frequency active.
Volume/Power
Frequency Toggle
Button
Active
Frequency
Standby
Frequency
MHZ Adjust
KHZ Adjust
Pressing the toggle button
has now changed 122.7 to
being the active channel
Press the toggle button to
change the active channel
Mode Button
Squelch
Button

Mode Button
Pressing the mode button will give access to three different modes.
Mode 1 is the default screen as explained above.
Mode 2 will access the Stored Memory Frequencies. The memory number will be shown on the
bottom of the screen and the active frequency on the top. To cycle through the stored memories
rotate the KHZ knob to view one by one or the MHZ knob to view in steps of ten memories at a time.
Mode 3 will show Battery voltage on the bottom of the screen with the active frequency still at the
top.
Storing a Frequency
To store a frequency simply select the desired frequency and toggle it to the top (active) of the
screen in the default mode (mode 1).
Press the mode button to get into the memory storage screen (mode 2) and select the memory
number to be used.
Press the store button. The frequency should now be stored in that memory number.
Extra Features
When Transmitting, a small triangle will appear on the left side of the active frequency.
When voltage drops below 10.5 volts the LCD screen will start flashing.
Memory Number
Active Frequency
Adjust stored
memories with
either MHZ or
KHZ knobs
Voltage