Instruction manual

10). If the antenna moved in the wrong direction in step 8) or step 9), it can be reversed by pressing the SPCH/

LOCK button twice within a period of 2 seconds [Press the RESET button twice within 2 seconds]. The Lock icon

must appear with each button press [the Lock icon will not appear]. After pressing the SPCH/LOCK button twice

within a period of 2 seconds, go back to step 8), and/or step 9), and recheck to make sure the antenna moves in the

correct direction. If you cannot reverse the direction, go back to step 7).

11). Under certain circumstances, the TC/SC uses PWM (pulse width modulation) to slow the motor down.

However, some screwdriver motors do not run well at the 50% pulse width. If the motor moved correctly in step 8)

or 9), then move to step 13). If the motor did not move properly in steps 8) or 9), go to step 12).

12). The percentage on-time can be changed with the following procedure which may be repeated for a larger

effect. You must be in the Checking Motor Polarity mode.

Press F-1 or F-2 to select Item 3, RTTY Mark Frequency. The value 1615 Hz should be displayed.

To increase the percentage on-time by 10%, rotate the VFO knob clockwise to 2125 Hz. To decrease the

percentage of on-time, rotate the Main Tuning Dial counterclockwise from 1615 Hz to 1275 Hz.

PRESS F-2 to return to the RTTY Shift Width display and test the result as described using step 8) or step 9).

13). The TC/SC has a built-in Stall Current detection scheme. In order to assure correct operation, the ground lead

for the 13.8 vdc used to power the antenna motor, must be connected to the chassis of the IC-7000 as outlined

above.

With the TC/SC Checking Motor Polarity mode, rotate the Main Tuning Dial counterclockwise to retract the

antenna completely (highest frequency), and then stop the antenna motion by displaying 200 Hz. If you have a

HiQ, then the plunger should be all the way at the top.

If you have a HiQ, or other antenna with a built-in current limiter, wait about one minute before proceeding.

Next, hold the SPCH/LOCK button on the IC-7000 until the lock icon appears on the screen, then release the

button [Press the RESET button]. The antenna will extend (move to a lower frequency) for approximately 4

seconds, then retract (move to a higher frequency) for approximately 4 seconds, and then stall for 4 seconds. The

motor current is measured under these conditions, and an appropriate stall current threshold is calculated and

saved. A successful determination of the stall current threshold will be signaled by double beeps.

If you did not get the double beeps, the you need to repeat the Setup procedure beginning at step 1).

Setting the SWR Threshold

The TC/SC has a default SWR setting of 1.5:1 on each band. It maybe reset to a different value (up or down), and

may be different for each band. However, the input impedance of any HF mobile antenna is partially dependent on

the image plane losses which vary from location to location. Setting the SWR threshold too low at one location,

may cause erratic operation at another.

The SWR threshold procedure may be ended at any time by turning off the IC-7000, and any SWR value set so far

will be saved. However, depending on which operation was aborted, the RF power out may remain at 25 watts.

This will require you to reset the SSB output power level. Please refer to the IC-7000 Owner’s Manual, page 38.

You may repeat the SWR threshold procedure as often as necessary. It should be performed at periods of low band

activity, as the procedure involves transmitting on the air.

If your antenna is properly matched with a base matching coil, and the SWR is under 1.5:1, you needn’t reset the

default SWR setting of 1.5:1. Again, setting the SWR threshold too low could cause erratic operation.