AT&T 2820 Instruction Manual Page 138

  • Download
  • Add to my manuals
  • Print
  • Page
    / 164
  • Table of contents
  • BOOKMARKS
  • Rated. / 5. Based on customer reviews
Page view 137
117
14
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.
DPACKET JACK PIN ASSIGNMENT
qDATA IN
Input terminal for data transmit. See left for details on how
to toggle data speed between 1200
(AFSK) and 9600 bps
(G3RUH, GMSK).
wGND
Common ground for DATA IN, DATA OUT and AF OUT.
ePTT P
PTT terminal for packet operation only. Connect ground to
transmit data.
rDATA OUT
Data out terminal for 9600 bps operation only.
tAF OUT
Data out terminal for 1200 bps operation only.
yP 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
Page view 137
1 2 ... 133 134 135 136 137 138 139 140 141 142 143 ... 163 164

Comments to this Manuals

No comments