Yaesu FT-950 Operating Manual

Also see for FT-950: Brochure & specs Reference Manual Update Update

Page 48 FT-950 O PERATING M ANUALI NTERFERENCE REJECTIONIF SHIFT OPERATION (SSB/CW/RTTY/PKT/AM MODES)IF SHIFT allows you to move the DSP filter passband higher or lower, without changing the pitch of the incoming signal,and thus reduce or eliminate interference. Because the carrier tuning frequency is not varied, there is no need to re-tune theoperating frequency to eliminate the interference. The total passband tuning range for the IF SHIFT system is ±1 kHz.1. Press the [SHIFT] button. The LED inside the [SHIFT]button glows orange. The [SELECT] knob functionsas the IF SHIFT knob. The center position of the IFpassband appears in the SHIFT indicator on the dis-play.2. Rotate the [SELECT] knob to the left or right to re-duce the interference.3. Press the [CLEAR] button to move the filter passbandto center.ADVICE:The center position of the IF passband will be memorizedindependently on each VFO stack of VFO-A and VFO-B.Referring to Figure “A”, note the depiction of theIF DSP filter as the thick line, with the[SELECT(SHIFT)] knob in the 12 o’clock posi-tion. In Figure “B”, an interfering signal has ap-peared inside the original passband. In Figure “C”,y o u c a n s e e t h e e ff e c t o f r o t a t i n g t h e[SELECT(SHIFT)] knob. The interference levelis reduced by moving the filter passband so thatthe interference is outside of the passband.[SHIFT] Button[SELECT] KnobSHIFT Indicator[CLEAR] ButtonIFBANDWIDTHIFBANDWIDTHIFBANDWIDTHDesired Signal Desired Signal Desired SignalQRMQRMA B C