Because the A10 and A20 digital RF transmission is inherently immune to intermodulation, multiple A10 and A20 Digital Wireless
transmitters can be used simultaneously on nearby adjacent frequencies without worry of intermodulation interference. Systems can
be used together when separated by at least 400 kHz. When operating in the 902-928 MHz Band, it is recommended to separate
channel frequencies by at least 1 MHz.
Touch the Frequency button to enter the Frequency menu. From the frequency menu, use the scroll wheels to select a frequency
(integer and fractional of MHz) or use the +400 kHz and -400 kHz buttons. Touch the Set Frequency button to set the frequency and
exit back to the Transmitter View.
After changing frequency, attach an antenna with a length specific to the frequency in use. Using the wrong length of antenna
reduces RF range. The recommended antenna for the set frequency is displayed in the Information menu. See Antenna Guide for
more information.
Setting RF Power
RF power is the strength of the transmitting signal. The A20-Mini offers the following RF power settings.
●
Off - A20-Mini is not transmitting RF.
●
Low - 2 mW
●
Normal - 10 mW
●
High - 20 mW
●
*Extra High - 40 mW. This setting only appears when Options>Allow Extra High - 40 mW RF Power is active.
RF Power settings are based on the selected Country of the device running A20-Remote as some legal restrictions may apply.
Touch the RF Power button and make a selection from the list.
In situations where the transmitter is relatively close to the receiver, the Low - 2 mW setting offers the best battery life.
For most common wireless microphone applications, the Normal - 10 mW setting provides excellent range. In situations where body
absorption may be an issue or extended range is required, the High - 20 mW setting can be helpful.
If significant body absorption is unavoidable or maximum range is required, the Extra High - 40 mW setting can be enabled via the
settings menu. Please be aware that the Extra High - 40 mW RF Power setting can reduce battery life by over 20%.
Tip: Try using Long Range Modulation to increase RF range prior to increasing the RF Power setting.
Mode
Touch the Mode button to enter the Mode menu. Select between RF Only, REC Only, and REC + RF.
Simultaneous Record and Transmit mode is not available on A20-Mini units sold or operated in the United States of America.
Record & Timecode details are not displayed in the TX Status Window when RF Only is selected. RF Transmission details are not
displayed in the Transmitter Status window when REC Only is selected.
Mute Mic
Touch the Mute Mic button to mute the microphone. When muted, no audio is present in the recordings or transmitted. Mute status is
indicated by a blue Mute Mic menu button, a blue dot in the A20-Mini Status indicator, and the A20-Mini Audio LED turns solid blue.
LEDs
The A20-Mini LEDs can be turned on or off. Turn the LEDs off when you need the A20-Mini to be discreet. When Off, the LEDs do
not illuminate except when pressing the red button to power on, power off, or pair, in Identify mode, and when USB-C is connected.
Formatting Media
Formatting the A20-Mini media deletes all recorded files. It is good practice to periodically format media. Make certain to transfer
any files before formatting. The first eleven characters of the transmitter name are used to name the media. Media is named at time
of format.
Modulation
Select Standard or Long Range Modulation. When compared to Standard Modulation, Long Range Modulation has better sensitivity.
This increased sensitivity results in more robust performance in challenging RF environments.
The Modulation setting must match between the A20-Mini and the A10-RX in order for the transmitted signal to be received.
A20-Mini
User Guide
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