FCC ID: K66FT-857
Operating Manual
Vertex Standard Co., Ltd.
40
(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.”
2. Press the MODE(<)/MODE(>) key, as needed, to select the DIG operating mode (the “DIG” icon will appear on the
display).
3. Now use Menu mode to configure the transceiver’s passband response. Once in the Menu mode, rotate the MEM/VFO
CH knob to select Menu Mode No-039 [DIG SHIFT], and rotate the DIAL knob to set the desired BFO offset. (a
center frequency for the receiver response). For WSJT use, a setting of about “+1500” will be a good starting point.
4. Finally, depending on how you wish the display to respond, you may program in a corresponding display shift, using
Menu Mode No-036 [DIG DISP].
5. Remember to press and hold in the [F] key for one second when exiting the Menu mode.
The setup of the AFSK drive level is identical to that described previously for RTTY operation.
The USER-L and USER-U Digital modes should allow you to operate on any SSB-based AFSK Digital mode. Note that
the “PSK31” configurations will also work well for many Digital operating situations.
Packet (1200/9600 bps FM) Operation
The FT-857 is designed for operation on either 1200 bps or 9600 bps packet, and setup is similar to that described
previously for SSB-based modes. A separate Data input adjustment is provided, allowing you to optimize the deviation on
the FM Packet modes separately from the levels set for SSB-based Digital modes. The RX-Data output lines are fixed-
level outputs, not affected by the setting of the AF Gain control.
1. Connect your TNC to the FT-857’s rear-panel DATA jack, per the illustration.
Note that different connections are used for 1200 bps and 9600 bps Packet.
2. Use Menu Mode No-073 [PKT RATE] to select the desired Packet mode.
Once you have entered the Menu and have selected Menu Mode No-073 [PKT RATE], rotate the DIAL knob to select
either “1200” or “9600” (bps) as the Packet rate.
3. Press the MODE(<)/MODE(>) key, as needed, to select the PKT operating mode (the “PKT” icon will appear on the
display).
You are now set up for reception on Packet. If you are operating on 1200 bps, try now to connect to another station or
node; you may well find that the drive level needs no further adjustment. If, however, you are having trouble connecting
due to insufficient or excessive drive from the TNC to the FT-857, use Menu Mode No-071 [PKT 1200] (for 1200 bps
Packet) or No-072 [PKT 9600] (for 9600 bps Packet) to set the drive. Use your terminal software’s “test” protocol to send
out test tones, and adjust the deviation by rotating the DIAL knob, which will vary the data input level to the FT-857’s
