JVC TDR6 Demodulator Application Notes, Industry Standard LNB Frequencies

Demodulator Application Notes

G

This appendix contains additional technical information for the TDEM-6110

Demodulator option module, including information on:

■Configuration

■Rates and channel spacing

■Estimating Eb/N0

■Troubleshooting

Configuration This section provides technical information to supplement the basic configuration procedures provided in the chapter on configuring the TDR6.

Industry Standard LNB Frequencies

The tuner input frequency for the demodulator is divided into two components (RF and LO) to correlate with industry standards. The following table lists the RF range for common LNB LO frequencies.

RF Ranges for LO Frequencies

RF Range		LNB LO (Mhz)	Input L-band	Type
(Mhz)			Range (Mhz)
3450	- 4200	5150	950 - 2150	C band
10950	- 11700	10000	950 - 2150	—
11700	- 12450	10750	950 - 2150	Domestic Ku Band
12250	- 13000	11300	950 - 2150	—

Demodulator Tuner SAW Filter

The demodulator tuner has a SAW filter (bandpass) for rejecting out-of-band noise. It is important that you correctly specify the input L-Band frequency to insure that the input spectrum is within the passband of the filter.

Check the Offset parameter to confirm that the acquired carrier is within 2 Mhz of the location you specified when entering the RF and LO parameters.

For the procedures used to query to offset parameter and to correct the offset by adjusting the RF and LO parameters, refer to the chapter on configuration.

Demodulator Application Notes 01-0870-401B 01/03 81