Psk31 Operation - Yaesu FT-818ND Operating Manual

4. 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
gage 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
Function Row 9 [ PWR, MTR ] , then press the
of ALC.
6. Press and hold in the
knob to select menu #25 (DIG MIC).
7. Following the instructions for your TNC's software, activate the transmitter from the
computer keyboard; this should cause the AFSK output from the TNC to be sent to the
radio. While transmitting, view the ALC meter; a few "dots" of ALC indication should be
observed. If not, rotate the
key 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 transmis-
sion short when running on battery power, so as to minimize current drain.

PSK31 Operation

Two dedicated PSK31 modes are available, one each for USB-side and LSB-side injec-
tion. For BPSK work, the injection does not matter, but for QPSK the two working stations
must use the same sideband.
Connect the FT-818 to your computer's sound card or interface.
Setup for PSK31 operation is basically identical to that previously described for RTTY
operation. As before, use the "DIG" mode. However, in Menu #26, select "PSK31-L" (for
LSB injection) or "PSK31-U" (for USB injection). As with RTTY, Menu #25 may be used to
set the drive to the transmitter. And the YF-122C 500 Hz filter may also be utilized, as de-
scribed previously.
Transmitter Operation
key for 1/2 second to enter the m
knob to adjust the AFSK level. Press and hold in the
knob to select to select Operating
( MTR ) key so as to select metering
mode, then rotate the
enu
( NAR ) key to en-
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