64
FT-857 Operating Manual
D
IGITAL
M
ODE
O
PERATION
(
SSB-B
ASED
AFSK
)
monitor ALC voltage. If not, press the [
FUNC
] key momentarily, then rotate the
SE-
LECT
knob to select to select Multi Function Row “i” [
MTR,
– – –
, DISP
], then press the
[
A
](
MTR
) or [
B
] key so as to select metering of ALC (“
ALC
” icon will appear at the
upper of the[
B
]] key).
5. Press and hold in the [
FUNC
] key for one second to enter the Menu mode.
6. Rotate the
SELECT
knob to recall Menu Mode
No-001
[
EXT MENU
]
, then rotate the
DIAL
to change the setting to “
ON
” to enable the extended Menu Mode.
7. Rotate the
SELECT
knob to select Menu Mode
No-037
[
DIG GAIN
]
.
8. 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 indica-
tion should be observed. If not, rotate the
DIAL
knob to adjust the AFSK
level within the
FT-857
for 16 dots of indication on the ALC meter.
9. Press and hold in the [
FUNC
] key for one second to save the new AFSK level setting and
return to normal operation. You are now ready for full RTTY operation.
Because RTTY is a continuous-duty transmission mode, try to keep your trans-
missions 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 injection.
For BPSK work, the injection does not matter, but for QPSK the two working stations must
use the same sideband.
1. Connect the
FT-857
to your computer’s sound card or interface.
2. Setup for PSK31 operation is basically identical to that previously described for RTTY
operation. As before, use the “DIG” mode. However, in Menu Mode
No-038
[
DIG MODE
]
,
select “
PSK31-L
” (for LSB injection) or “
PSK31-U
” (for USB injection). As with RTTY,
Menu #38 may be used to set the drive to the transmitter. And the
YF-122C
500 Hz filter
or
YF-122CN
300 Hz filter may also be utilized, as described previously.
“USER” Defined Digital Modes
Also provided in the
FT-857
are two convenient “USER” Digital modes, one each provid-
ing USB- and LSB-side injection, which may be used for SSTV, Fax, Pactor, and other
digital operating modes.
Here is an example involving the configuration of the USER mode for JT44 (WSJT) opera-
tion with USB-side injection (as opposed to LSB injection, used in the default “RTTY”
mode):
1. Use Menu Mode
No-038
[
DIG MODE
]
to set the Digital mode to “
USER-U
.”
T
RANSMITTER
O
PERATION
