Icom IC-910H - Setting the ACC Socket; Data Communication

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DATA COMMUNICATION
n Setting the ACC socket
When operating AFSK, set the specifications of the
ACC socket to fit your TNC or scan converter in ad-
vance.
q Push [SET] for 1 sec. to enter the set mode.
w Push [DN Z] or [Y UP] to select the 9600 bps data
mode setting item, then rotate the tuning dial to turn
the 9600 bps rate ON and OFF
Push [SWP 0] again after setting.
 •“9600”isdisplayed.
 •9600bpsdatarateisselectedwhenON,andaslower
data rate is selected when OFF is selected.
 •Push[M-CL5]for1sectoreturntothedefaultsetting.
e Push [Y UP] to select ACC socket pins 5 and 6 set-
ting item, then rotate the tuning dial to select from
“nor”(normal)and“Sub”(sub).
 •“ACCP5.6”isdisplayed.
 •When“nor”(normal)isselected,theACCsocket(pins
5and6)outputsMAINbandsignals.When“Sub”isse-
lected, the ACC socket outputs SUB band signals.
 •Push[M-CL5]for1sectoreturntothedefaultsetting.
NOTE: Select“nor”(normal)whenoperatingdata
mode in satellite mode.
r Push [Y UP] to select the modulation signal input
level setting item, then rotate the tuning dial to se-
lectfrom“HI”and“Lo”(sub).
 •“ACC.t-AF”isdisplayed.
 •HI:200mVrms,Lo:2mVrms
 •Push[M-CL5]for1sectoreturntothedefaultsetting.
 •Thissettingisignoredwhen9600bpsdatamode(w) is
selected and 1.0 V p-p is set as a fixed value.
t Push [SET] to exit from the set mode.
D Adjusting the transmit signal output
from the TNC
When setting the data transmission speed to 9600
bps, the data signal coming from the TNC is applied
exclusively to the internal limiter circuitry to control the
transmission.
NEVER apply data levels from the TNC of over 0.6 V
p-p, otherwise the transceiver automatically cancels
the transmission.
1. When using a level meter or synchroscope, ad-
just the TX audio output level (DATA IN level)
from the TNC as follows.
 0.4Vp-p(0.2Vrms):recommendedlevel
 0.2–0.5Vp-p(0.1–0.25Vrms):acceptablelevel
2. When NOT using a measurement device.
q Connect the transceiver to a TNC.
wEnteratestmode(“CAL”,etc.)totheTNC,then
transmit some test data.
e When the transceiver fails to transmit the test
data or transmits sporadically (TX indicator does
not appear or flashes):
- Decrease the TNC output level until the transmit
indicator lights continuously.
When transmission is not successful even though
the TX indicator lights continuously:
- Increase the TNC output level.