Yaesu FT-897 Operating Manual

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Yaesu FT-897 Operating Manual Manual pdf 26 page image

Page 24 FT-897 OPERATING MANUALIF SHIFTThe receiver’s IF SHIFT feature is an effective interference-reduction tool, which allows you to shift the passband re-sponse higher or lower without changing the pitch of theincoming signal.RECEIVER ACCESSORIES1. Press and hold in the CLAR/IF SHIFT button for onesecond to activate the IF SHIFT feature. An icon, suchas “ ”, “ (slightly shifted to the upper side),” “ (moreshifted to the upper side),” “ (slightly shifted to thelower side),” or “ (more shifted to the lower side)”icon will appear at the right of the frequency display toindicate the IF SHIFT’s current position.2. Rotate the CLAR knob, as needed, to reduce or elimi-nate the interference.3. To turn the IF SHIFT feature off, again press and hold inthe CLAR/IF SHIFT button for one second. The lastsetting of the IF SHIFT control will be retained until youchange it again.If you wish to make a more permanent shift in the receiver’sIF passband, use Menu Mode No-015 [CAR LSB R] (forLSB mode) or No-017 [CAR USB R] (for USB mode). Thisallows you to set up a higher or lower listening pitch, if youprefer such as compared to the default passband response.See page 55.AGC (AUTOMATIC GAIN CONTROL)The receiver recovery time constant of the AGC system maybe modified to match your operating needs.1. Press the [F] key momentarily, then rotate the MEM/VFO CH knob, as needed, until Multi Function Row “l”[NB, AGC, AUTO] appears on the display.2. Press the [C] key to toggle the AGC recovery time con-stant among the following selections:AUTO FAST SLOW AUTO where “AUTO” represents “FAST” on CW and DIG(AFSK), and “SLOW” on the voice modes.If you disable the AGC by pressing the [B](AGC)key (to make the parentheses disappear), the S-meter (which monitors AGC voltage) will ceaseto function. Depending on the setting of the RF Gain con-trol, incoming signals will probably be distorted if the AGCis turned off.B AT T- AB AT T- BBANDMODECLARAFLOCKPHONEMICSQL/RFMEM/VFO CHDWN UPV/MDSPUPDSPFCLARCLAR/IF SHIFTB AT T- AB AT T- BBANDMODECLARAFLOCKPHONEMICSQL/RFMEM/VFO CHDWN UPV/MDSPUPDSPFCB F MEM/VFO CH