2 INSTALLATION AND CONNECTIONS

■Grounding

To prevent electrical shock, television interference (TVI), broadcast interference (BCI) and other prob- lems, ground the transceiver through the GROUND terminal on the rear panel.

For best results, connect a heavy gauge wire or strap to a long earth-sunk copper rod. Make the distance between the [GND] terminal and ground as short as pos- sible.

R WARNING: NEVER connect the [GND]

terminal to a gas or electric pipe, since the connec- tion could cause an explosion or electric shock.

■Antenna connectionPL-259 CONNECTOR INSTALLATION EXAMPLE

For radio communications, the antenna is of critical im- portance, along with output power and receiver sensi-

q

 

30 mm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Coupling ring

10 mm (soft solder)

w

10 mm

Soft

 

 

 

 

 

 

 

 

 

 

 

 

 

 

solder

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1–2 mm

Slide the coupling ring down. Strip the cable jacket and in the braid.

Strip the cable as shown at left. Tin the center conductor.

tivity. Select antenna(s), such as a well-matched 50 Ω antenna, and feedline. We recommend 1.5:1 or better of Voltage Standing Wave Ratio (VSWR) for your desired band. Of course, the transmission line should be a coaxial cable.

When using 1 antenna, use the [ANT1] connector.

CAUTION: Protect your transceiver from lightning

e

solder

solder

 

 

 

 

 

Slide

the connector

 

 

 

 

 

 

 

 

body on and solder it.

r

 

 

 

Screw

the coupling

 

 

 

 

 

 

 

 

 

 

 

ring

onto

the

 

 

 

 

 

 

 

connector body.

 

 

 

 

 

 

30 mm ≈ 9⁄8 in

10 mm ≈ 3⁄8 in

1–2 mm ≈ 1⁄16 in

by using a lightning arrestor.

Antenna SWR

Each antenna is tuned for a specified frequency range and SWR may be increased out-of-range. When the SWR is higher than approx. 2.0:1, the transceiver’s power drops to protect the final transis- tors. In this case, an antenna tuner is useful to match the transceiver and antenna. Low SWR allows full power for transmitting. The IC-7700 has an SWR meter to monitor the antenna SWR continuously.

■USB-Memory connection (USB-Memory: Not supplied by Icom)

Connect the USB-Memory* to the USB connector.

• Unmount operation is necessary before removing the USB- Memory* (p.12-25).

Make sure to connect the USB-Memory correctly. NEVER connect or remove the USB-Memory when the read/write indicator lights or blinks.

A USB keyboard* or USB hub* can also be con- nected to the USB connector.

or

*: USB-Memory, USB keyboard or USB hub is not supplied by Icom.

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