This read-write object sets the receive frequency, valid either in the L-Band range (950-1950 MHz) or IF-Band ranges (50-90 MHz and 100-180 MHz), with 100 Hz resolution. This must be tuned to match the actual downlink frequency the satellite is transmitting on, after any LNB conversion tracked separately via cdd564LNBLOFrequency, so an incorrect value here is one of the most common reasons a demodulator never locks despite the antenna being properly pointed. For a transponder whose signal, after LNB downconversion, lands at a specific frequency, an admin would set this object to exactly that value to bring the demodulator into lock.