D [Send]; D [Line In]/[Line Out] - Icom IC-7760 Basic Manual

Controller

D [SEND]

An external unit controls the transceiver. When
the SEND pin goes to ground, the transceiver
transmits.
• Input voltage (RX): 2.0 to 20.0 V
• Input voltage (TX): –0.5 to +0.8 V
• Current flow: Maximum 20 mA
The pin goes low when the transceiver transmits.
• Output voltage (TX): Less than 0.1 V
• Current flow: Maximum 200 mA
L You can also use ACC 1 and ACC 2 pin 3 on the RF deck
to control the transceiver using an external unit.
When the SEND terminal controls an inductive load, such
as a relay, a counter-electromotive force can malfunction
or damage the transceiver. To prevent this, we recommend
adding a switching diode, such as a 1SS133, on the load
side of the circuit to absorb the counter-electromotive force.
L When the diode is added, a delay in relay switching
may occur. Be sure to check its switching action before
operating.
L Be sure to connect the Negative terminal of the Power
source for Relay to the [SEND] jack's GND terminal.
Example: [SEND] jack
Switching diode
SEND
3.5 mm
GND
(1/8 inch)
Power source for Relay (15 V)
To a non-Icom
linear amplifier
Relay
13-6
CONNECTOR INFORMATION

D [LINE IN]/[LINE OUT]

[LINE IN]
Inputs the audio signal to the internal
modulator circuit. (
3.5 mm (1/8 inch)
• Impedance: 10 kΩ
• Output level: 100 mV rms*
* 1 You can change the MOD input level.
L 100 mV rms is at 50% as the default.
»
SET > Connectors > MOD Input >
MENU
LINE-IN MOD Level
L You can also use ACC 1 pin 4 on the RF deck to input the
audio signal.
[LINE OUT]
Outputs the demodulated AF signal or 12 kHz IF
signal. ( )
3.5 mm (1/8 inch)
• Output impedance: 4.7 kΩ
• Output level: 100 ~ 300 mV rms*
* 2 You can change the AF/IF (IF=12 kHz) output level.
L Approximately 200 mV rms is at the 50% as the
default.
»
SET > Connectors > LINE-OUT AF/IF Output
MENU
L You can change the AF/IF (IF=12 kHz) settings to output
a 12 kHz IF signal. In that case, you can listen to DRM
communication with the application software receiver that
is installed onto your PC.
»
SET > Connectors > LINE-OUT AF/IF Output >
MENU
Output Select
L You can also use ACC 1 pin 5 on the RF deck to output
the demodulated AF signal or 12 kHz IF signal.
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