While transmitting in FM or FM narrow mode, the BFO
circuit generates a 9.0115 MHz or 9.0100 MHz frequency
as the TX
FM
PLL reference frequency, respectively.
Mode
RX BFO/3rd
LO
TX BFO/FM
PLL
ref.
frequency
[MHz]
frequency
[MHz]
USB
9.0130
9.0130
LSB
9.0100
9.0100
CW
9.0106
9.0106
(-
CW
pitch
frequency)
(-
CW
pitch
frequency)
CW-R
9.0106
9.0106
(+
CW
pitch
frequency)
(+
CW
pitch
frequency)
RTTY
9.008375
(2125 Hz
tone)
9.0105
(MARK)
9.008885 (1615 Hz
tone)
AM
No output
9.0100
FM
9.4665 (3rd LO)
9.0115
(PLL
ref.)
FM
nar.
9.4650 (3rd
LO)
9.0100
(PLL
ref.)
WFM
No output No output
IF
shift:
Center
RTfY:
Normal
polarity
3·4 LOGIC CIRCUITS
3-4-1 BAND SELECTION DATA
(MAIN AND
PLL
UNITS)
To select the correct RFlow-pass filter, high-pass filter and
VCOs on the PLL unit, the CPU outputs the following band
selection data from the I/O expander (MAIN unit IC31,
IC32), the
NO
converter (MAIN unit IC35) or DDS IC (PLL
unit
ICl
0) depending on the displayed frequency.
The
NO
converter output from IC35 pin 5 is doubled by 2 at
IC34a to obtain the band voltage for external equipment.
Band
selection
data
IC31,IC32 IC35
ICl0
(PLL)
Frequency
(MAIN)
(MAIN)
(MHz)
HPF
LPF
1/2 band
VCO
LPF
BPF
. voltage
BPF
0.03-1.999
Ll
L1
3.76 V
2.0-3.999
L2
L2
3.08 V
4.0-7.999
L3
L3
2.57 V
8.0-10.999
OV
VCOl
LOFl
L4
L4
11.0-14.999
2.06 V
15.0-21.999
L5 L5
1.61
V
22.0-29.999
L6 L6
1.12V
30.0-39.999 B7W
L7
VC02
LOF2
40.0-59.999
B7
60.0-128.999 VC01 LOF3
B8W
0.61
V
129.0-143.999 LOF4
144.0-148.000 B8
L8
LOF5
VC02
148.000001-
BSW
LOF4
200.000000
3-8
3-4-2 MAIN CPU PORT ALLOCATIONS
(MAIN UNIT IC25)
Pin
Port
Description
number
name
9
SPS
Outputs a mute signal for AF power
(P52) amplifier according to the [PHONES]
jack.
13 DASH
Input port for DASH signal
of
the
(P97) paddle to the internal keyer.
14
DOT
Input port for DOT signal
of
the
(P96)
paddle to the internal keyer.
15 SNDL
Input
port for transmit/receive
(P95)
switching signals. This port becomes
"High" while transmitting.
16 TKEY
Input port for the keying signal of
(P94) optional AT-180/AH-3 antenna tuners.
17 TCON
Input port for the optional AH-3
(P93) antenna tuner.
19
PWK Input port for the [POWER] switch.
(P91)
20
POWS Outputs a power ON signal.
(P90)
21
ATST
Outputs start signal for the optional
(P60)
AT-180 antenna tuner.
22
BEEP
Outputs beep tone and CW side tone
(P61) signals.
23 AHST
Outputs start signal for the optional
(P62) AH-3 antenna tuner.
24
sass
Outputs a squelch control signal.
(P63)
30
SMV
S-meter level input for squelch
(P70) control.
31
NSaV
FM
noise level input for squelch
(P71)
control.
32 FORV
Forward RF power level input for
Po
(P72) and SWR meter indications.
33
REFV Reflected RF power level input for
(P73) SWR meter indication.
34 ALCV
ALC level input for ALC meter
(P74) indication.
37
TONE Outputs subaudible tone signals.
(P77)
39
BUSY Input port for the optional
UT
-1
02
(P40) busy signal. This port becomes
"High" during speech synthesis.
40 ETON Outputs tone burst signals for
(P40) European repeaters.
41
SPST Outputs a strobe signal for the
(P42)
optional UT-102.
42 lOT
Outputs serial data for the I/O
(P43)
expanders, optional
AT
-180/UT-102.
43 ICK Outputs a clock signal for the I/O
(P44) expanders, optional
AT
-1801UT
-1
02.
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