Icom IC-2725E Instruction Manual page 87

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 0.6 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 synchroscope, adjust the
TX audio output level (DATA IN level) from the TNC as
follows.
0.4 V p-p (0.2 V rms)
0.2 V p-p–0.5 V p-p (0.1–0.25 V rms)
2. When NOT using a measuring device.
q Connect the transceiver to a TNC.
w Enter a test mode ("CAL", 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.
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 While pushing [SET•
w Push [SET•
e Rotate the left band [DIAL] to select the desired band from
: recommended level
: acceptable level
r Push [PWR] to exit initial set mode.
OTHER FUNCTIONS
] turn power ON to enter initial set
mode.
] or [LOW•PRIO] to select the 'PAC' item.
auto (At; default), left (L) and right (r).
• Auto (At) : The main band is used for packet oper-
ation.
• Left (L)/Right (r) : The selected left or right band can only
be used for packet operation.
MAIN
T X
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MAIN
T X
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