DTC Palladium Pd-TX-100 Manuale - Pagina 11

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PROGRAMMING

Transmitter Control Application

Output Frequency (MHz)

(your frequency)

The transmit frequency can be changed by entering the new desired

frequency in this field. Values outside the range supported by a particular

transmitter type will be rounded to the highest or lowest supported

frequency as appropriate. The resolution of the transmit frequency is

complex and resolved to the closest achievable within the constants of the

supported step sizes of 1MHz, 1.6667 MHz and 2.5 MHz.

Modulation Output

OFF

This control is used to turn on and off the RF output. After a configuration

change, the output always reverts to OFF. It must be ON for operation.

Modulation FEC

2/3

The default FEC is 2/3, however improved range operation can be achieved

by selecting FEC 1/3. FEC 1/3 will improve signal range by 3dB. However

FEC 1/3 reduces link capacity to 1.2Mb/s therefore reducing picture

quality.

FEC Link Bitrate Sensitivity 2/3 2.4Mb/s: -99dBm,

1/3 1.2Mb/s: -102dBm

1/16

Modulation Guard Interval

The Guard Interval is fixed at 1/16 in current software releases.

Modulation Bandwidth

2.5 MHz

For the Palladium transmitter products, the modulation bandwidth is fixed

at 2.5MHz.

QPSK

COFDM Mode

The COFDM mode can be changed between QPSK and 16QAM. QPSK is

the default mode and will give the strongest most rugged RF link

Default values are shown in red.

performance. Selecting 16QAM reduces the link performance by 5dB but

improves the link data throughput, giving significantly better video quality.

DTC COMMUNICATIONS, INC.