Icom IC-7100 Advanced Instructions

6
FUNCTIONS FOR TRANSMIT
6-13
Measuring SWR
The IC-7100 has a built-in circuit for measuring antenna
SWR— no external equipment or special adjustments
are necessary.
The IC-7100 can measure SWR two ways — spot mea-
surement and plot measurement.
D Spot measurement
This function is convenient to use when measuring
SWR of the antenna to install or periodic check.
q If desired, push
TUNER/CALL
(L) once or twice to turn
OFF the antenna tuner.
• If the antenna tuner is connected, and your want to mea-
sure SWR of the antenna itself, perform this step.
Select the desired frequency band. (p. 3-6) w
On the Mode selection screen, select the RTTY or e
RTTY-R mode. (p. 3-17)
If necessary, adjust the RF power to more than 30 W r
on the Mic gain/RF power adjustment display.
• If your are operating in the 144 MHz band, adjust the RF
power to more than 20 W.
• If your are operating in the 430 MHz band, adjust the RF
power to more than 15 W.
• If your are operating in the 70 MHz band, adjust the RF
power to more than 20 W. (70 MHz band transmission is
available, depending on the transceiver version.)
q Push
MIC/RF PWR
(C) to open the MIC gain/RF
power adjustment display.
w Rotate [BANK] (L) to adjust the RF power.
e Push
MENU
(C) to close the display.
Before transmitting, monitor the operating fre-
quency to make sure transmitting won’t cause
interference to other stations on the same fre-
quency.
Touch the TX meter one or more times to select the t
SWR meter.
Hold down [PTT] on the microphone or switch ON y
the external TX switch to transmit.
Read the SWR on the SWR meter. u
• If the SWR meter points 1.5 or less, the antenna is
matched .
Release [PTT] or Switch OFF the external TX switch i
to receive.
• When the measured SWR is more than 1.5:1, adjust the
antenna to match with the transceiver.
L
eft
R
ight
C
enter
D
isplay
NOTE
This transceiver can measure SWR in the 144 MHz or
430 MHz bands.
Depending on the length of the connected coaxial
cable, or installation condition, the measurement may
be different from the actual SWR of the antenna in
these band.
The L, R, C or D in the
instructions indicate the
part of the controller.
L: Left side
R: Right side
C: Center bottom
D:
Display (Touch screen)
The best match is in this range.
(1.5 or less)
SWR meter
RTTY mode icon
Previous view

Icom IC-7100 Specifications

General

Supply	13.8 V DC ±15%
Voltage	13.8 V DC
Operating Temperature	-10°C to +60°C
Frequency Coverage	0.030-199.999 MHz, 400-470 MHz
Modes	SSB, CW, AM, FM, DV
Output Power	HF/50MHz: 100W, 144MHz: 50W, 430MHz: 35W
Receiver Type	Superheterodyne
Antenna Connector	SO-239 (HF/50MHz/144MHz), N-type (430MHz)
Weight	Main unit: 2.3 kg
Type	Base/Mobile
Frequency Range TX	1.8–54 MHz, 144–148 MHz, 430–450 MHz
Frequency Range RX	0.030–199.999 MHz, 400–470 MHz
Memories	505
Current Consumption	TX: 22 A, RX: 1.2 A