Yaesu FT-817ND User Manual

41FT-817ND Operating Manual
PACKET
(
1200/9600 BPS FM
)
OPERATION
The FT-817ND 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 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-817ND’s rear-panel DATA jack, per the illustration. Note
that different connections are used for 1200 bps and 9600 bps Packet.
2. Use Menu #40 (PKT RATE) to select the desired Packet mode. Once you have entered
the Menu and have selected Menu #40, rotate the knob to select either “1200” or
“9600” (bps) as the Packet rate.
3. Press the / key, as needed, to select the PKT mode (the “PKT” icon
will appear on the display).
4. 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 fur-
ther adjustment.
5. If you are having trouble connecting due to insufficient or excessive drive from the TNC
to the FT-817ND, use Menu #39 (PKT MIC) to set the drive. Use your terminal software’s
“test” protocol to send out test tones, and adjust the deviation by rotating the
knob, which will vary the data input level to the FT-817ND’s modulator. Remember to
press and hold in the key for one second when adjustments are completed, so as to
save the new setting for Menu #39.
The 9600 bps Packet deviation setting is very critical to successful operation, and
it can only be accomplished using a calibrated deviation meter; the optimum set-
ting is usually ±2.75 kHz (±0.25 kHz). For 1200 bps, the optimum level is much less
critical, with the optimum deviation being between ±2.5 kHz and ±3.5 kHz.
TRANSMITTER OPERATION
Pin
1
2
3
4
5
Note
Maximum Input Lebel
40 mV pp @1200 bps
1.0 V pp @9600bps
Impedance: 10 kΩ
Ground to Transmit
Maximum Output Level: 500 mVpp
Impedance 10kΩ
Maximum Output Level: 300 mVpp
Impedance 10kΩ
SQL Open: +5V
SQL Closed: 0V
Label
DATA IN
PTT
DATA OUT
9600 bps
DATA OUT
1200 bps
SQL

Yaesu FT-817ND Specifications

General

Output power	1 W
Frequency range	30 - 100000 MHz
Channels quantity	208 channels
Display type	LCD
Product type	Portable CB radio
Product color	Black
Housing material	-
Battery type	AA
Number of batteries supported	8

Weight and Dimensions

Depth	165 mm
Width	135 mm
Height	38 mm