Measuring SWR

The IC-7000 has a built-in circuit for measuring an- tenna SWR—no external equipment or special adjust- ments are necessary.

The IC-7000 can measure SWR in 2 ways—spot mea- surement and plot measurement.

FUNCTIONS FOR TRANSMIT

6

Menu selection (Example: S-1)

•Push [MENU/GRP] for 1 sec. once or twice to select the menu group S. Selection from: M, S or G(Graphic) •Push [MENU/GRP] momentarily one or more times to select the menu S-1. Selection from: S-1,S-2or S-3

D Spot measurement

q Select CW or RTTY operation with [MODE]. w Confirm that the output power is over 30 W. e Select the menu S-1.

r Push [F-3MET] one or more times to select the

SWR meter.

t Key down or push [PTT] to transmit; then read the actual SWR from the meter.

) 1.5 well matched antenna

[MENU/GRP] [F-3]

> 1.5 check antenna or cable connection, etc.

 

 

 

 

 

 

 

 

 

 

SWR

1

 

 

 

 

1.5 2 - 3

The best match is in this range.

DPlot measurement

6

Plot measurement allows you to measure the SWR over an entire band.

q Confirm that the output power is over 30 W.

w Set the center frequency for the SWR to be mea- sured.

e Select the menu G-3(SWR meter).

r Push and hold [F-4STEP] for 1 sec. one or more times to select the desired measuring step from 10, 50, 100 and 500 kHz.

t Push [F-2]or [F-3]one or more times to select the desired number of measuring steps from 3, 5, 7, 9, 11, and 13 steps.

y Push [F-1]to start the measuring.

u Push and hold [PTT] on the microphone to mea- sure the SWR.

•Frequency marker, “,” appears below SWR graph. •RTTY mode is automatically selected.

i When releasing [PTT], the frequency marker and frequency indication move to the next frequency to be measured.

o Repeat steps u and i to measure SWR over the entire frequency range.

!0When the measured SWR is less than 1.5:1, the antenna is well matched with the transceiver in the measured frequency range.

 

 

 

 

 

 

 

 

 

 

 

 

Push [F-1] to start

Push [F-4] to Select

mesuring.

SWR mesuring steps.

 

 

 

 

 

 

Push [F-2] or [F-3] to select number of

SWR mesuring steps.

Measuring (after pushing [F1])

Frequency marker appears and moves after measurement.

4.0 : 1

3.0 : 1

2.0 : 1

1.5 : 1

1.0 : 1

The antenna is well matched in this range

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Image 103
Icom IC-7000 instruction manual Measuring SWR, Menu selection Example S-1, Spot measurement, Plot measurement