Interface Configuration and Interpretation
Configurations: This dialog box provides an option to recall a number of settings configuration files; for example, prestored transponder parameters. The configuration files are created and stored in the MTM400. To select a configuration file, highlight the required name in the list.
Tuner Frequency (kHz):
This value is the center frequency of the IF channel to be received (that is, after downconversion in the LNB where applicable). Any frequency can be entered; there is no need to follow a channel plan. The frequency resolution is determined by the tuner step size of 1 MHz.
Symbol Rate (kBaud):
This value is the symbol frequency (Baud rate) of the signal to be received, over a range of 1 to 30 MBaud. You need to enter the symbol rate to a typical accuracy of 1000 ppm to ensure successful lock.
Modulation Format:
The card supports a number of modulation formats: Turbo FEC 8PSK, Turbo FEC QPSK, DVB QPSK and Digicipher ™ II. Enter the appropriate format and puncture rate (also known as the code rate) into the modulation dropdown dialog box. A Scan function is also provided, allowing automatic acquisition if the precise code rate is not known.
LNB Power: The QPSK/8PSK card incorporates a regulated power supply for control of a LNB (Low Noise Block) or similar equipment. The supply voltage, using the
LNB 22kHz Tone:
A 22 kHz tone is provided for control of an LNB (Low Noise Block) or similar equipment. The tone, using the
Front End Lock If full lock is acquired onto the channel and it is receiving the signal correctly, the Front End Lock (FEL) indicator will light up green. When a signal is present but no lock is achieved, the indicator is red. When no signal is found, the indicator is gray.
BER | The Bit Error Rate ahead of the FEC is displayed. |
MTM400 MPEG Transport Stream Monitor User Manual |