Audio A10-TX-US, Руководство пользователя

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A10-TX-US User Guide
Basic Operation
Frequency Selection
The A10 Digital Wireless System available in the operates in the UHF frequency band from 470
to 608 MHz. There are two models of the A10-TX-US transmitter to cover this frequency range.
Multiple A10 Digital Wireless systems can be used simultaneously on nearby adjacent
frequencies without worry of intermodulation interference since the A10 Digital Wireless System
and its digital RF transmission is inherently immune to intermodulation. Systems can be used
together when separated by at least 400 kHz. Use the scan tool on the A10-RX receiver to search
for available frequencies.
ª When using A10 Digital Wireless systems in conjunction with analogue RF systems, an
intermodulation plan needs to be addressed for analogue receivers.
Channel, Sub Channel, Frequency
To simplify frequency selection, frequencies are divided into channels and sub channels.
• Channel - corresponds to broadcast television channels used in geographic region.
• Sub Channel - channels are divided in 400 kHz increments called sub channels to speed up
frequency selection. The number of sub channels depends on the channel mapping selected.
• Tune
- specific frequencies within the transmitter’s tuning range can be selected in 25 kHz
increments.
To change TV channels, use the Left button to highlight the TV
Channel. Press the centre Menu button to select the TV channel.
Select the sub channel until the desired sub-channel is selected.
See the
Frequency Tables in this guide for a complete list of
frequencies corresponding to the channel and sub channel selections.
Audio Input and Control
The A10-TX-US input accepts a wide range of audio input types, including lavalier microphones,
balanced microphones, and balanced and unbalanced line level signals. 12 V and 48 V phantom
power is available for balanced microphones. The Selection Menu offers options for audio level
control, input type, limiters, and low cut filter.
Lavalier Microphones
Unbalanced lavalier microphones wired in two-wire mode, are directly compatible with the
A10-TX-US input. When connected, the A10-TX-US auto-detects the presence of a lavalier
microphone.
Balanced Microphones with Phantom
Balanced microphones, including phantom powered shotgun microphones, can be connected
to the A10-TX-US. 12 V and 48 V phantom power are available for microphones requiring
it. For microphones that can properly operate on 12 V phantom, such as the Schoeps CMIT,
select 12 V phantom to significantly increase battery runtime.
Line-Level Sources
Wireless systems are often used as “camera hop” systems. For most camera hop applications
the output of a field mixer is connected to a wireless transmitter. The wireless receiver output
is connected to the camera input. The line level input selection simplifies using the A10