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PANEL DESCRIPTION
NOTE: When connecting or disconnecting an external
speaker-microphone, rst turn off power to the transceiver.
i TUNING CONTROL [DIAL]
Changes the operating frequency; memory channel in
memory mode; set mode contents in set mode, etc.
o VFO/CLEAR KEY [VFO(CLR/MHz)Å]
Push to select VFO mode. (p. 9)
Cancels some functions such as digit input before entry,
scans, etc.
Push and hold for 1 sec., then rotate [DIAL] to change
the MHz digit. (p. 10)
While pushing [PTT], this key sends a DTMF A. (p. 21)
!0 MEMORY MODE KEY [MR(MW)ı]
Push to select memory mode. (p. 11)
•“X appears while in memory mode.
Push for 1 sec. to enter memory write mode. (p. 18)
While pushing [PTT], this key sends a DTMF B. (p. 21)
!1 CALL KEY [CALLÇ]
Push to select the call channel. (p. 19)
While pushing [PTT], this key sends a DTMF C. (p. 21)
This connection
does not apply
when a conden-
sor microphone
is connected.
Remote Audio out
(8 )
[SP]
MIC
3.2 V
PTT
[MIC]
Audio input
PTT
33 k
(2 k)
!2 OUTPUT POWER KEY [H/L(LOCK)Î]
Push to toggle between low and high power. (p. 11)
•“LOW appears while low power is selected.
Push for 1 sec. to toggle the lock function on/off. (p. 11)
•“L appears while the lock function is activated.
While pushing [PTT], this key sends a DTMF D. (p. 21)
!3 RIT KEY [RIT(TSCAN)#] (p. 13)
Push, then rotate [DIAL] to change the RIT/VXO setting.
This function is only available for the 1.2 GHz band and RIT
or VXO must be activated in set mode (p. 13).
Push for 1 sec. to turn the tone scan function on/off. (p.
26)
While pushing [PTT], this key sends a DTMF F. (p. 21)
!4 DIGIT KEYS
Input the specied digit during frequency input, memory
channel selection, etc.
Transmit the DTMF code of the specified digit while
pushing [PTT]. (p. 21)
!5 MHz KEY [ (M)]
Used as a shortcut for inputting frequencies. (p. 10)
Transmits an E for DTMF operation while pushing
[PTT]. (p. 21)
!6 EXTERNAL DC POWER JACK [DC13.5V]
Allows you to operate the transceiver with a 4.5 to 16 V DC
power source using optional cables, CP-12L or OPC-254L.
u CAUTION: DO NOT connect when a battery case is at-
tached.
IC-T81A/E Manual-(1) 01.12.5 6:55 PM Page 3 (1,1)
7


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