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1
ADVANCED OPERATIONS
1-14
Operating ATV
1200 MHz and higher bands
The IC-905 has ATV (Amateur TV) in the analog
FM mode� You can receive video signals from other
stations or transmitters for video, or transmit video
and audio signals input from external devices�
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Information
• You cannot receive and transmit signals in the analog
AM ATV mode� The conventional transceivers (IC-1271A/
IC-1271E/IC-1275A/IC-1275E) are compatible with only
ATV in the analog AM mode�
• Input video from the [AV-IN] jack to transmit�
• You can output the received video to an external device
connected to the [AV-OUT] jack�
1� Connect an external device to the [AV-IN] jack�
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When you transmit only video signals, you do not
need to connect the audio plug (white)�
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You can select the connector(s) to input the
modulation signal in the ATV mode�
(Default: MIC, AV-IN)
» SET > Connectors > MOD Input >
ATV MOD
You can adjust the modulation input level of the
[AV-IN] jack�
» SET > Connectors > MOD Input >
AV-IN MOD Level
2� Select the audio subcarrier frequency�
» SET > Function >
ATV Audio Sub Carrier Frequency
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Set the same subcarrier frequency between the caller
station and the called station�
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When you receive or transmit only video signals, set
to “OFF�”
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When inputting PAL or SECAM video, “ATV Audio
Sub Carrier Frequency” is set to “4�5 MHz,” and
interference occurs with audio and video signals� In
that case, change the input device to a one that uses
a compatible video format standard, or set “ATV Audio
Sub Carrier Frequency” to other than “4�5 MHz�”
3� Set the operating band�
4� Set the operating mode to ATV�
5� Set the operating frequency�
6� To display the transmitted and received video,
open the VIDEO screen�
»
VIDEO
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To display the received or transmitted video in full-
screen mode, touch the RX Video zone or the TX
Video zone, and touch again or push
to cancel
the full-screen mode�
When receiving signals in ATV mode
The received video is displayed on the RX Video
zone, left side of the VIDEO screen�
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If the received video is corrupted, change the IF filter
setting or “AV-OUT Video Output Level�”
» VIDEO > SET > Video Level >
AV-OUT Video Output Level
To transmit signals in ATV mode
The video input from the external device is displayed
on the TX Video zone, right side of the VIDEO screen�
Hold down [PTT] to transmit, and release to return to
receive�
• The TX indicator lights red while transmitting�
TIP:
• When the TX indicator blinks red, and you cannot
transmit in the ATV mode, the input from the [AV-IN] jack
is excessive (over deviation)� To transmit, set “AV-IN
Video Input Level” to a lower level�
» VIDEO > SET > Video Level >
AV-IN Video Input Level
• When the audio subcarrier frequency is set to “6�5MHz,”
DO NOT
set the IF filter to FIL 3 (5 MHz). If the IF
filter is set to FIL 3, no audio is heard while receiving
because the audio subcarrier is out of the passband�
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When transmitting, the audio subcarrier’s signal
strength level may become low, but the called station
can hear the audio if its IF filter is set to FIL 1.
Connection example:
To [AV-IN] jack
To [AV-OUT]
jack
To output the received video
Monitor
Camera
(Red)
Audio (White)
Video (Yellow)
(Red)
Audio (White)
Video (Yellow)
3�5 mm (1/8 inch) 4 pole plug to
RCA connector cable (User supplied)