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10. Encoder Readout

This can be done while carrying out the phase and servo test, type in ‘azim’ into the parameter box, as shown
above,

and allow the unit to rotate through 360 degrees. Watch the ‘azim’ value to make sure there are no

sudden jumps in value of the encoder readout.

Содержание Artemis Mk6 FAT

Страница 1: ...ALF OF GUIDANCE MARINE BY Paul Woods Name of author COPYRIGHT STATEMENT This document and the information contained therein is the property of Guidance Marine Ltd It must not be reproduced in whole or...

Страница 2: ...re Amp Gain and Noise Measurement 8 6 AGC Amplifier 10 7 Fixed Delay Adjustment 15 8 Anti Icing 18 9 Phase and Servo Test 19 10 Encoder Readout 21 ii References WI G2 ESD Equipment Testing and Recordi...

Страница 3: ...4 to program the Artemis with the latest production release of software Open the ASI software and connect to the Artemis The installed version of software is found under the parameter settings Versio...

Страница 4: ...s Connect a calibrated DVM across the GND and 24V test points on the Interconnect board Record the reading in section 4 1 of the build record The AUP voltage measurements are in the parameter settings...

Страница 5: ...move the AUP and slot in the AUP breakout board To test these you don t need to remove the top cover of the AUP enclosure Picture shows areas to spray and spray each of the sensor areas with freezer s...

Страница 6: ...with a 30 dB in line attenuator Set the spectrum analyser to following settings Centre Frequency 9250MHz Span 150MHz Amplitude Ref level 0dBm Bandwidth Auto This is usually 910KHz Trace Detector Trace...

Страница 7: ...s is the loss of the waveguide adaptor the attenuator then AUTO ZERO Check the power head for any changes to values to the LIN or CAL factor In the ASI software set txpm to Manual transmit power then...

Страница 8: ...by results in section 4 3 of the build record The suppression is the difference between the high power output and standby For example 20dB high power output and 25dB standby power would be a suppressi...

Страница 9: ...output into the spectrum analyzer Set the spectrum analyser to following settings Centre Frequency 30MHz Span 20MHz Amplitude Ref level 50dBm Amplitude 5dB per division Bandwidth 1MHz Trace Detector...

Страница 10: ...g the SUM into the system Power up the Artemis unit and put into operating mode Repeat the test that was carried out on the SUM channel and enter the results into section 4 4 of the build record Power...

Страница 11: ...ctrum analyzer to set up the function generator the spectrum analyzer will most likely be the only calibrated piece of test equipment Set the function generator to sine wave change the frequency till...

Страница 12: ...Each time you change the attenuator check on the spectrum analyzer that the signal is correct As you change the attenuators the signal strength will follow suit the frequency will always be at 30MHz...

Страница 13: ...and phc3 values to 0 Then in the parameter boxes type iaze and qpha This is used to work out the SUM DIF Phase difference So the above values give 143 7216 0 0198 Note this down in section 4 5 of the...

Страница 14: ...m analyzer that the signal level is correct Then the signal level correction is ready to be worked out The target signal level is Attenuator Value Target Signal level 40dB 58 30dB 48 20dB 38 10dB 28 0...

Страница 15: ...ve the T piece adaptor and place the SUM and DIF cables back onto the IF Pre amp 7 Fixed Delay Adjustment Remove the power meter adaptor plate from the antenna flange and fit the TDC fixed delay meter...

Страница 16: ...eck the signal level Select F1 remote station and press the arrow keys on the TDC Fixed delay meter till you see 1 9300MHz Then you get a timing written on screen that s when you know it is connected...

Страница 17: ...l result in the time delay increasing and adjusting the value down will result in the time delay decreasing As you can see from the photos you will not get 489 0nS on every frequency but you can get v...

Страница 18: ...fixed delay adjustment Using a calibrated multimeter set to AC voltage probe across the heater contacts on the antenna flange and you will see 0VAC Turn on the anti icing using the ASI software aion...

Страница 19: ...Closed Loop Fit the phase servo tester nicknamed the horses head to the antenna flange Turn On the horses head and it should start to rotate Using the delta phase and 180 phase adjustments you can ge...

Страница 20: ...ld record the build record is filled in mV so 0 313 is 313mV Change the servo loop gain slgn from 5 to 4 and note down the voltage again Repeat with slgn set at 3 and 2 Adjust the phase shifter on the...

Страница 21: ...coder Readout This can be done while carrying out the phase and servo test type in azim into the parameter box as shown above and allow the unit to rotate through 360 degrees Watch the azim value to m...