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ATU-HP
Tuning Procedure
Remove front cover. Avoid contact with high
1
voltage points at top of coils and high voltage
insulator.
Inspect capacitors for visual signs of
2
lightning damage.
Capacitor values are frequency
dependent - see technical instruction
manual for NDB or DGPS values.
ATU-HP: Tuning | Issue 1.0, Apr. 21, 2010
Nautel Customer Support: 1.902.823.3900
Check meter indications of FORWARD
3
REFLECTED PWR on test meter. When
compared to TX meter indications
values should be within 10%
Fig. 1
Page 1 of 4
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Summary of Contents for Nautel ATU-HP
- Page 1 Inspect capacitors for visual signs of lightning damage. Capacitor values are frequency dependent - see technical instruction manual for NDB or DGPS values. Fig. 1 Nautel Customer Support: 1.902.823.3900 Page 1 of 4 ATU-HP: Tuning | Issue 1.0, Apr. 21, 2010...
- Page 2 Note: L tune error may also cause R tune error so check L tune first. Note: If necessary switch OFF transmitter and change coil taps to increase or decrease the inductance as described in the Technical Instruction Manual. Nautel Customer Support: 1.902.823.3900 Page 2 of 4 ATU-HP: Tuning | Issue 1.0, Apr. 21, 2010...
- Page 3 Optimum Tune Minimum L Maximum L Fig. 4 Do not proceed to optimize the R tuning until the L TUNING NORMAL LED is ON. Nautel Customer Support: 1.902.823.3900 Page 3 of 4 ATU-HP: Tuning | Issue 1.0, Apr. 21, 2010...
- Page 4 T1’s terminal blocks. Fig. 6 Ensure that the ATU is left in the REMOTE Control position (LOCAL/REMOTE LED OFF) on completion of this adjustment process. Nautel Customer Support: 1.902.823.3900 Page 4 of 4 ATU-HP: Tuning | Issue 1.0, Apr. 21, 2010...