Icom IC-208H Service Manual

4 - 9
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51
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Input port for the cloning signal.
Outputs the data signal to the D/A
CONVERTER (IC11, pin 17).
Outputs the clock signal to the D/A
CONVERTER (IC11, pin 16).
Outputs the strobe signal to the D/A
CONVERTER (IC1, pin 15).
Outputs the AF mute control signal.
High : While AF signal is muting.
Outputs the strobe signal to the UHF
PLL IC (IC2, pin 11)
Outputs the strobe signal to the VHF
PLL IC (IC1, pin 11)
Outputs the detector circuit mute sig-
nal.
High : While the detector circuit is
muting.
Outputs microphone sensitivity control
signal.
High : The sensitivity is high.
Outputs the UHF VCO control signal.
High : The VCO circuit oscillates
320–999.99 MHz signal.
Outputs packet baud rate select sig-
nal.
Low : 9600 bps is selected.
Outputs the 800_R5 regulator (Q29)
control signal.
High : While receiving 630–999
MHz.
Outputs the 400_R5 regulator (Q28)
control signal.
High : While receiving 230–630
MHz.
Outputs the UHF_R5 regulator (Q27)
control signal.
High : While receiving 430–450
MHz.
Outputs the VHF_R5 regulator (Q26)
control signal.
High : While receiving 118–174
MHz.
Outputs modulation mute control sig-
nal to the VCO circuits.
High : While modulation is muting.
Outputs the microphone muting con-
trol signal.
Low : While the microphone is
muted.
Outputs the R5 regulator (Q24) control
signal.
Low : While receiving.
CLONE_IN
DA_DATA
DA_CK
DA_STB
AF_MUTE
PLLSTB2
PLLSTB1
DET_MUTE
MIC_SENS
U_VCO
1200_9600SEL
RX800
RX400
RXUHF
RXVHF
MMUTE
MIC_MUTE
R5CTRL
(MAIN unit; IC505)–Continued
Pin Port
Description
number name
16
17
20
21
22
24
25
26
27
28
31
38
40
41
42
44
45
47
48
49
Outputs the transmit mute signal.
High : While transmit is muting.
Input port for the microphone PTT sig-
nal.
High : While PTT switch is pushed.
Outputs the UHF transmitting power
supply circuit control signal.
High : While transmitting (400–479
MHz)
Outputs the VHF transmitting power
supply circuit control signal.
High : While transmitting (136–174
MHz)
Outputs the DTCS filter select signal.
High : While the DTCS signal is
transmitting.
I/O port for the serial data to the EEP-
ROM (IC501, pin 5).
Outputs the clock signal to the EEP-
ROM (IC501, pin 6).
Input port for the packet [PTT] switch.
Low : While the packet [PTT] switch
is ON
Outputs the packet modulation muting
signal.
Low : While muting.
Input port for the HM-98’s data signal.
Input port for the connecting micro-
phone detect signal.
Low : While the HM-98 is connect-
ed.
Input port for the squelch level signal.
Input port for the RSSI signal from the
FM IF IC (IC8, pin 12) to detect receiv-
ing signal strength.
Input port for the transceiver’s internal
temperature signal.
Input port for the WX alert (1050 Hz)
signal.
Outputs DTMF, E-TONE and BEEP
signals.
Outputs CTCSS and DTCS signals.
Outputs the packet squelch control
signal.
High : While the squlech is opened.
Outputs the cooling fan control signal.
High : While the cooling fan is
worked.
Outputs the cloning signal.
4-6 PORT ALLOCATIONS
4-6-1 MAIN CPU PORT ALLOCATIONS
(MAIN UNIT; IC505)
TX_MUTE
MIC_PTT
UTXC
VTXC
DTCS_SEL
ES_DATA
ES_CK
P-PTT
P_MOD_MUTE
98_DATA
MIC_SEL
SQL
RSSI
TEMP
WXALT
DTMF
DTCS
P_SQL
FAN_CTRL
CLONE_OUT
Pin Port
Description
number name

Icom IC-208H Specifications

General

Brand	Icom
Model	IC-208H
Category	Transceiver
Language	English