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AH-4 Antenna Tuner Outline
1
•
The AH-4 matches the IC-746PRO to a long wire
antenna more than 7 m/23 ft long (3.5 MHz and above).
–
NEVER
operate the AH-4 without an antenna wire. The
tuner and transceiver will be damaged.
–
NEVER
operate the AH-4 when it is not grounded.
–
Transmitting before tuning may damage the transceiver.
•
Note that the AH-4 cannot tune when using a 1.2
l
long
wire or multiple of the operating frequency.
•
When connecting the AH-4, the antenna connector
assignments are [ANT2] for the internal tuner and
[ANT1] for the AH-4. The antenna indicator in the LCD
displays “EXT” when the AH-4 is connected and
selected.
Summary of Contents for IC-746PRO
Page 2: ...Front Panel Rear Panel ...
Page 3: ...Rear Panel Front Panel ...
Page 4: ...POWER Connector Accepts 13 8 V DC through the supplied DC power cable OPC 025D ...
Page 5: ...TX Indicator Lights red while transmitting ...
Page 6: ...RX Indicator Lights green while receiving a signal and when the squelch is open ...
Page 11: ...AH 4 Connector Connection for the AH 4 Automatic Antenna Tuner ...
Page 12: ...ACC Connectors Connectors used for Accessories ...
Page 18: ...Key Jack Rear Jack to be used for Keying via a Straight Key or Computer ...
Page 19: ...Data Connector Data connection for Packet operation ...
Page 34: ...PBTC Clears the Twin PBT settings when pushed for 1 sec ...
Page 37: ...Advanced Twin PBT Graphs ...
Page 39: ...LCD Breakdown ...
Page 41: ...RIT Readout Shows the RIT or TX frequency offset ...
Page 42: ...VFO Readout Indicates whether VFO A or VFO B is selected ...
Page 45: ...RIT Readout Shows the RIT or TX frequency offset ...
Page 46: ...Antenna Readout Display outlines the antenna being used Mode and Voice Scanning Conditions ...
Page 50: ...AH 4 Antenna Tuner Installation ...
Page 55: ...Common Functions Shows the status of commonly used functions ...
Page 78: ...MONITOR Set Mode Enters to monitor set mode when pushed for 1 sec ...
Page 82: ...MICROPHONE CONNECTOR Accepts the supplied or optional microphone ...
Page 83: ...AF RF SQUELCH CONTROL Concentric control for the AF Control and RF Squelch ...
Page 84: ...AF CONTROL Inner control varies the audio output level from the speaker or Headphone outputs ...
Page 93: ...NR NOTCH CONTROL Concentric control for the Noise Reduction and Manual Notch features ...
Page 114: ...Fine Scanning There are two types of Fine Scanning Fine Program Scan Fine DF Scan ...
Page 137: ...Band Scope View ...
Page 142: ...Memory Keyer Function Map ...