Zaxcom Inc. TRX Manual Do Utilizador
TRANSMISSION FORMAT SELECTION
The display will show "Format X"
where X is US or EU. If this item is not set correctly the
receiver will not be able to receive any audio from this transmitter. This item allows the user
to choose between US mode and European mode. This user selection will not take effect
until the unit has been powered down and restarted. The US mode (mode 0) transmits a
signal that occupies a bandwidth of 200 kHz. This is legal in the US and several other countries.
This mode provides the best audio quality. The European mode (mode 1) is designed to occupy
a 140 kHz bandwidth. This mode will allow a greater transmitter range and will allow more
transmitters to operate simultaneously than the US mode. Check local legal requirements to
determine which mode is allowed in the country you are operating in. In the future, there will be
more modes to choose from which will increase range and audio quality even further.
Visit
to choose between US mode and European mode. This user selection will not take effect
until the unit has been powered down and restarted. The US mode (mode 0) transmits a
signal that occupies a bandwidth of 200 kHz. This is legal in the US and several other countries.
This mode provides the best audio quality. The European mode (mode 1) is designed to occupy
a 140 kHz bandwidth. This mode will allow a greater transmitter range and will allow more
transmitters to operate simultaneously than the US mode. Check local legal requirements to
determine which mode is allowed in the country you are operating in. In the future, there will be
more modes to choose from which will increase range and audio quality even further.
Visit
the transmitter and receiver the range and feature set will dramatically increase over time.
Zaxcom has a reputation for constantly adding new features and user suggestions during the
entire lifetime of a product. This ensures that your wireless system will perform better and better
the longer you own it.
Zaxcom has a reputation for constantly adding new features and user suggestions during the
entire lifetime of a product. This ensures that your wireless system will perform better and better
the longer you own it.
HIGH-PASS FILTER SELECTION
The display will show 'HIGH PASS' and the high pass frequency. This indicates different high-
pass filter cutoff frequencies. Selection is from 20Hz to 220Hz
Filters are implemented digitally. Note that since the high-pass filter is implemented in the digital
domain, the automatic compressor/limiter may engage even when the user hears no substantial
audio. The purpose of the limiter is to prevent the mic preamp from over-driving the A/D
converter. Therefore the limiter operates on audio before it has been processed by the high-pass
filter. If there is a massive amount of low frequency audio content being filtered out by the high
pass filter (such as wind noise) the user may hear the effects of the limiter without hearing the
audio that caused the limiter to engage. If this problem occurs then the gain is set too high.
Reduce the mic preamp gain well below that which will trigger the limiter.
pass filter cutoff frequencies. Selection is from 20Hz to 220Hz
Filters are implemented digitally. Note that since the high-pass filter is implemented in the digital
domain, the automatic compressor/limiter may engage even when the user hears no substantial
audio. The purpose of the limiter is to prevent the mic preamp from over-driving the A/D
converter. Therefore the limiter operates on audio before it has been processed by the high-pass
filter. If there is a massive amount of low frequency audio content being filtered out by the high
pass filter (such as wind noise) the user may hear the effects of the limiter without hearing the
audio that caused the limiter to engage. If this problem occurs then the gain is set too high.
Reduce the mic preamp gain well below that which will trigger the limiter.
RF POWER OUTPUT SELECTION
The power output is fixed at 34mW. The new hardware design uses higher battery power when
the RF output power is reduced making this the optimum power level for this hardware version.
Power can be lowered where the legal limit requires a lower power level. Consult the factory for
adjustment information.
Programming
The TRX990/TRX990AA can be programmed by downloading the operating program from the
Zaxcom web site and loading it onto a Mini SD memory card. Once the program is on the card
insert the card in the TRX900. Hold down the “Increment and Decrement” key at the same time
and switch on the power. The unit should show the word programming. This process will take
about 10 seconds. After it is done power down the unit and power back up to run the new
program.