Icom IC-7200 [73/104] At 180 internal switch description

Icom IC-7200 [73/104] At 180 internal switch description
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ANTENNA TUNER OPERATION
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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 Remo
ve 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 throughif 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 transceivers
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
D C B A
Connector information for ACC(2) socket
ACC 2
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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).

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