RF Central microLite Transmitter, Руководство пользователя

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microLite Transmitter User Manual
Revision 1.2
16
2.1.2 Power, Remote Control, and User Data Interface Connector
The microLite Transmitter Power, Remote Control, and User Data interface includes
power and ground connections plus two RS-232 serial port interfaces.
2.1.3 Audio and Video Input Connectors
The microLite TX has two analog audio inputs and one video input. They are used for
stereo audio and HD/SD-SDI or NTSC/PAL video input. Refer to Chapter 3 for
specifications of these signals.
2.1.4 User Data Input
A data channel may be transmitted along with the audio and video information. The
data channel is accessed through a RS-232 serial interface in the EXT connector.
2.1.5 MPEG4 Encoder (H.264 Part 10)
The MLT encodes the input video signal before modulation and transmission to reduce
bandwidth. The microLite TX contains a built-in MPEG4 (H.264 part 10) encoder for
this purpose. The microLite TX features the latest compression methods utilizing I, P
and B frames for more accurate encoding of compressed video signals.
2.1.6 COFDM Modulator
The COFDM modulator receives data from the output of the MPEG4 AVC encoder
through a circuit that enhances the security of transmissions. The
microLite TX is able
to transmit data at high data rates and with low error rates using COFDM modulation
techniques. The data rate used by the transmitter depends upon the CODFM modulator
settings used.
2.1.7 RF Transmitter
The microLite microwave circuits mix the signal to the desired microwave frequency.
The signal is filtered and boosted through a low noise output amplifier.
The
microLite TX has a single SMA style antenna connector. The output impedance of
the antenna connector is 50 ohms.
Note: On 2.4 and 5.8GHz models that operate in USA, the connectors are RP-SMA
due to FCC requirements.
Refer to Chapter 3, “Specifications” for frequency band and channel tuning
specifications.