Other Functions - Icom IC-E2820 Instruction Manual

D Adjusting the transmit signal output from
the TNC
When setting data transmission speed to 9600 bps, the data
signal coming from the TNC is applied exclusively to the in-
ternal limiter circuitry to automatically maintain band width.
NEVER apply data levels from the TNC of over 0.7 V p-p, oth-
erwise the transceiver will not be able to maintain the band
width and may possibly interfere with other stations.
1. When using a level meter or oscilloscope, adjust the
TX audio output level (DATA IN level) from the TNC as
follows.
0.7 V p-p (0.35 V rms)
2. When NOT using a measuring device.
q Connect the transceiver to a TNC.
w Enter a test mode ("CALL", etc.) on the TNC, then trans-
mit some test data.
e When the transceiver fails to transmit the test data or
transmits sporadically (TX indicator doesn't appear or
flashes):
- Decrease the TNC output level until the transmit indi-
cator lights continuously.
When transmission is not successful even though the
TX indicator lights continuously:
- Increase the TNC output level.
: recommended level

OTHER FUNCTIONS

D Packet operation band selection
Both bands, or either the left or right band only, can be spec-
ified for packet operation to suit your preference.
q Push [F•
] to display function guide.
w Push [MENU](V/MHz•SCAN)
screen.
e Rotate
to select
[DIAL]
[MAIN•BAND].
r Rotate [DIAL] to select "PACKET BAND" then push
[MAIN•BAND].
t Rotate [DIAL] to select desired band from MAIN
left (L) and right (R), then push [MAIN•BAND].
• MAIN : The main band is used for packet op-
eration.
• Left (L)/Right (r) : The selected left or right band can only
be used for packet operation.
y Push [BACK](V/MHz•SCAN)
to frequency indication.
14
to enter MENU
(Right band's)
"PACKET" then push
,
(default)
twice to return
(Right band's)
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