Kenwood TS-990S Operation Manual - Page 83
Simultaneous Main Band And Sub Band Reception, Frequency Tracking, Tracking]
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ASSISTING YOUR SMOOTH QSO 5 SIMULTANEOUS MAIN BAND AND Sub band RECEPTION The transceiver has two independent receivers, so that the transceiver can receive on the main band and sub band using different frequencies. For example, while you have a QSO using the transceiver in simplex operation on the main band, you can tune into a sub band frequency that a DX-pedition operator has announced to work on and wait for the DX-pedition operator to come up. Furthermore, if you wish to call a DX station using Split operation, with the reception in the main band using the frequency occupied by the DX station, you can monitor the transmitted signal by receiving the signal on the sub band. 4 4 FREQUENCY TRACKING By rotating the Tuning (M) control with the frequency tracking function activated, you can change the main band and sub band frequencies with the difference between the frequencies maintained. Also, rotating the Tuning (S) control can change the sub band frequency without changing the main band frequency. This frequency tracking will be useful, for instance, when different antennas are connected for the main band and sub band allowing you to measure the difference in the signal strengths. The tracking function is particularly effective on the low-frequency bands. Frequency Tracking can be used while the main band and sub band are in VFO mode. If Frequency Tracking is enabled when the main band and sub band are in different modes, the sub band is placed in the same mode as the main band.
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