Yaesu FT-817 Operating Manual

Also see for FT-817 -: Brochure & specs Operating manual Technical supplement Manual Modification Instructions

39FT-817 Operating Manual4. If the optional YF-122C 500 Hz filter has been installed, it may be used for RTTY work.Recall Operating Function Row 7 [IPO, ATT, NAR] then press the (NAR) key toengage the narrow filter.5. To set up the transmit side, be sure that the Meter is set to monitor ALC voltage. If not,press the key momentarily, then rotate the knob to select to select OperatingFunction Row 9 [PWR, MTR], then press the (MTR) key so as to select metering ofALC.6. Press and hold in the key for 1/2 second to enter the MENU mode, then rotate theknob to select Menu #25 (DIG MIC).7. Following the instructions for your TNC’s software, activate the transmitter from thecomputer keyboard; this should cause the AFSK output from the TNC to be sent to theradio. While transmitting, view the ALC meter; a few “dots” of ALC indication shouldbe observed. If not, rotate the knob to adjust the AFSK level. Press and hold in thekey for one second to save the new AFSK level setting and return to normal opera-tion. You are now ready for RTTY operation.Because RTTY is a continuous-duty transmission mode, try to keep your transmissionshort when running on battery power, so as to minimize current drain.PSK31 OperationTwo dedicated PSK31 modes are available, one each for USB-side and LSB-side injection.For BPSK work, the injection does not matter, but for QPSK the two working stations mustuse the same sideband.Connect the FT-817 to your computer’s sound card or interface.Setup for PSK31 operation is basically identical to that previously described for RTTYoperation. As before, use the “DIG” mode. However, in Menu #26, select “PSK31-L” (forLSB injection) or “PSK31-U” (for USB injection. As with RTTY, Menu #25 may be used toset the drive to the transmitter. And the YF-122C 500 Hz filter may also be utilized, asdescribed previously.TRANSMITTER O PERATIONDIGITAL M ODE O PERATION (SSB-BASED AFSK)