Nautel ATU-HP Tuning Procedure Download Page 3

Page: 3 / 4

If L coils are at limit, turn TX off and adjust coil taps as per ATU manual

Fig. 3

Fig. 4

Vane interrupts a light beam at
limits of travel.

L tuning
variometer.

R tuning variable matching
transformer.

L TUNING MAX or MIN LIMIT LEDs
should turn ON only at extremes of travel.
Otherwise limit sensor may be defective.

Do not proceed to optimize the R tuning until the L TUNING NORMAL LED is ON.

Limit Switch Assembly viewed from
motor end of end of shaft

Optimum Tune

Maximum L

Minimum L

ATU-HP: Tuning | Issue 1.0, Apr. 21, 2010

Page 3 of 4

Nautel Customer Support: 1.902.823.3900

Summary of Contents for ATU-HP

Page 1: ...ghtning damage Capacitor values are frequency dependent see technical instruction manual for NDB or DGPS values 3 Check meter indications of FORWARD REFLECTED PWR on test meter When compared to TX met...

Page 2: ...e on and the CPU OK LED is flashing 4 5 Select LOCAL control LED ON to activate INCREASE and DECREASE switches 6 Press INCREASE or DECREASE L TUNING switch verify auto tune moves coils back to previou...

Page 3: ...g transformer L TUNING MAX or MIN LIMIT LEDs should turn ON only at extremes of travel Otherwise limit sensor may be defective Do not proceed to optimize the R tuning until the L TUNING NORMAL LED is...

Page 4: ...mer T1 controls the final tuned position of the variable matching transformer If necessary change the input green and output red tap positions to center its tuned position between the MAX and MIN limi...