Icom IC-2820H Instruction Manual - Page 140

Packet operation

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15 OTHER FUNCTIONS ■ Packet operation D Data speed For packet operation, the transceiver can be set to one of two data speeds: 1200 bps (default) or 9600 bps. q Push [F• ] to display function guide. w Push [MENU](V/MHz•SCAN) (Right band's) to enter MENU screen. e Rotate [DIAL] to select "PACKET" then push [MAIN•BAND]. r Rotate [DIAL] to select "PACKET BPS" then push [MAIN•BAND]. t Rotate [DIAL] to select desired data transmission speed from 1200 bps (default) and 9600 bps, then push [MAIN•BAND]. y Push [BACK](V/MHz•SCAN) (Right band's) twice to return to frequency indication. For 1200 bps operation- • Disconnect the microphone plug from the microphone connector during data transmission, otherwise the data signal and voice signal are simultaneously transmitted. For 9600 bps operation- • When the transceiver is set for 9600 bps data transmis- sion in set mode, the microphone signal is automatically cut. Therefore, it is not necessary to disconnect the microphone plug from the connector in this case. • When pushing [PTT] during data transmission, data transmission is interrupted and voice signals have priority. 119 DPACKET JACK PIN ASSIGNMENT q w e r t y Front panel view q DATA IN Input terminal for data transmit. See left for details on how to toggle data speed between 1200 (AFSK) and 9600 bps (G3RUH, GMSK). w GND Common ground for DATA IN, DATA OUT and AF OUT. e PTT P PTT terminal for packet operation only. Connect ground to transmit data. r DATA OUT Data out terminal for 9600 bps operation only. t AF OUT Data out terminal for 1200 bps operation only. y P SQL Output is high (+5 V) when the transceiver receives a signal which opens the squelch. • To avoid unnecessary TNC transmission, connect squelch to the TNC to inhibit transmission when receiving signals. • Keep audio output at a normal level, otherwise a "P SQL" signal will not be output.

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119
15
OTHER FUNCTIONS
■
Packet operation
D
Data speed
For packet operation, the transceiver can be set to one of two
data speeds: 1200 bps
(default)
or 9600 bps.
q
Push
[
F
•
]
to display function guide.
w
Push
[MENU](V/MHz•SCAN)
(Right band’s)
to enter MENU
screen.
e
Rotate
[DIAL]
to select “PACKET” then push
[MAIN•BAND]
.
r
Rotate
[DIAL]
to select “PACKET BPS” then push
[MAIN•BAND]
.
t
Rotate
[DIAL]
to select desired data transmission speed
from 1200 bps
(default)
and 9600 bps, then push
[MAIN•BAND]
.
y
Push
[BACK](V/MHz•SCAN)
(Right band’s)
twice to return
to frequency indication.
For 1200 bps operation—
• Disconnect the microphone plug from the microphone
connector during data transmission, otherwise the data
signal and voice signal are simultaneously transmitted.
For 9600 bps operation—
• When the transceiver is set for 9600 bps data transmis-
sion in set mode, the microphone signal is automatically
cut. Therefore, it is not necessary to disconnect the mi-
crophone plug from the connector in this case.
•
When pushing [PTT] during data transmission, data trans-
mission is interrupted and voice signals have priority.
D
PACKET JACK PIN ASSIGNMENT
q
DATA IN
Input terminal for data transmit. See left for details on how
to toggle data speed between 1200
(AFSK)
and 9600 bps
(G3RUH, GMSK)
.
w
GND
Common ground for DATAIN, DATA OUT and AF OUT.
e
PTT P
PTT terminal for packet operation only. Connect ground to
transmit data.
r
DATA OUT
Data out terminal for 9600 bps operation only.
t
AF OUT
Data out terminal for 1200 bps operation only.
y
P SQL
Output is high (+5 V) when the transceiver receives a sig-
nal which opens the squelch.
• To avoid unnecessary TNC transmission, connect squelch to the
TNC to inhibit transmission when receiving signals.
• Keep audio output at a normal level, otherwise a “P SQL” signal
will not be output.
Front panel view
w
y
r
q
e
t