Icom IC-7200 Instruction Manual - Page 73

■ AT-180 internal switch description, Specifications for the AT-180, AT-180 inside top cover - dimensions

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9 ANTENNA TUNER OPERATION ■ AT-180 internal switch description The optional AT-180 has 3 operating configurations for HF band operation. Select a suitable configurations according to your antenna system. q Remove the top cover of the AT-180. w S et the tuner switches to the desired positions ac- cording to the table below. SW Position Operation A The tuner operating condition is set by (default) S2 described below. S1 B THROUGH INHIBIT The tuner tunes the antenna even when the antenna has poor SWR (up to VSWR 3:1 after tuning). In this case, manual tuning is necessary each time you change the frequency although the tuner automatically starts tuning when the VSWR is higher than 3:1. This setting is called "through inhibit," however, the tuner is set to "through" if the VSWR is higher than 3:1 after tuning. C TUNER SENSITIVE CONDITION The tuner tunes each time you transmit (except SSB mode). Therefore, the lowest SWR is obtained at any given time. For SSB mode, the same condition as the "D" position. S2 D NORMAL (default) The tuner tunes when the SWR is higher than 1.5:1. Therefore, the tuner activates only when tuning is necessary. • AT-180 inside top cover S2 S1 DC BA • Connector information for ACC(2) socket 76 3 1 54 2 ACC 2 • Specifications for the AT-180 • Frequency coverage : 1.8-54 MHz • Input impedance : 50 Ω • Maximum input power : 120 W • Minimum tuning power : 8 W • Matching impedance range : 16.7-150 Ω (HF band) 20-125 Ω (50 MHz band) • Tuning accuracy : Less than SWR 1.5:1 • Insertion loss : Less than 1.0 dB (after tuning) • Power supply requirements : 13.8 V DC/1 A (supplied from the transceiver's ACC socket) • Dimensions (mm/in) : 167(W) × 58.6(H) × 225(D) 69⁄16(W) × 25⁄17(H) × 87⁄8(D) • Weight (approx.) : 2.3 kg; 5 lb 11⁄8 oz • Supplied accessories : Coaxial cable (1 m), ACC cable (DIN 13 pins) PIN NO./ NAME DESCRIPTION q NC (*If the modification is performed (p. 97), (8 V*) regulated 8 V output.) (10 mA max.) w GND Connects to ground. e SEND Input/output pin. Goes to ground when transmitting (20 mA max). When grounded, transmits. r NC (*If the modification is performed (p. 97), (BAND*) band voltage output.) t ALC ALC output voltage (-4 to 0 V). y NC No connection. u 13.8 V 13.8 V output when power is ON (1 A max). 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 68

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68
9
ANTENNA TUNER OPERATION
1
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■
AT-180 internal switch description
The optional AT-180 has 3 operating configurations
for HF band operation. Select a suitable configura-
tions according to your antenna system.
q
Remove the top cover of the AT-180.
w
Set the tuner switches to the desired positions ac-
cording to the table below.
SW
Position
Operation
S1
A
(default)
The tuner operating condition is set by
S2 described below.
B
THROUGH INHIBIT
The tuner tunes the antenna even when
the antenna has poor SWR
(up to VSWR
3:1 after tuning)
. In this case, manual tun-
ing is necessary each time you change
the frequency although the tuner auto-
matically starts tuning when the VSWR
is higher than 3:1. This setting is called
“
through inhibit,
” however, the tuner is
set to “
through
” if the VSWR is higher
than 3:1 after tuning.
S2
C
TUNER SENSITIVE CONDITION
The tuner tunes each time you transmit
(except SSB mode)
. Therefore, the lowest
SWR is obtained at any given time.
For SSB mode, the same condition as
the “D” position.
D
(default)
NORMAL
The tuner tunes when the SWR is higher
than 1.5:1. Therefore, the tuner activates
only when tuning
is necessary.
•
Specifications for the AT-180
• Frequency coverage
: 1.8–54 MHz
• Input impedance
: 50
Ω
• Maximum input power
: 120 W
• Minimum tuning power
: 8 W
•
Matching impedance range
: 16.7–150
Ω
(HF band)
20–125
Ω
(50 MHz band)
• Tuning accuracy
: Less than SWR 1.5:1
• Insertion loss
: Less than 1.0 dB
(after tuning)
•
Power supply requirements
: 13.8 V DC/1 A (supplied
from the transceiver’s
ACC socket)
• Dimensions (mm/in)
:
167(W)
×
58.6(H)
×
225(D)
6
9
⁄
16
(W)
×
2
5
⁄
17
(H)
×
8
7
⁄
8
(D)
• Weight (approx.)
: 2.3 kg; 5 lb
1
1
⁄
8
oz
• Supplied accessories
: Coaxial cable (1 m),
ACC cable (DIN 13 pins)
•
AT-180 inside top cover
S2
S1
DC
BA
•
Connector information for ACC(2) socket
ACC 2
1
2
3
4
5
6
7
PIN NO./
NAME
DESCRIPTION
q
NC
(8 V*)
(*If the modification is performed (p. 97),
regulated 8 V output.) (10 mA max.)
w
GND
Connects to ground.
e
SEND
Input/output pin.
Goes to ground when transmitting
(20 mA max).
When grounded, transmits.
r
NC
(BAND*)
(*If the modification is performed (p. 97),
band voltage output.)
t
ALC
ALC output voltage (–4 to 0 V).
y
NC
No connection.
u
13.8 V
13.8 V output when power is ON (1 A max).