747飞机维护手册AMM CHAPTER 34 - NAVIGATION 第34章导航4(78)

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 AF  bottom antenna, between 6 and 18 feet (2 and 6 meters) from the
 AF  airplane's bottom ATC antenna.
 AF
 AF  NOTE: The test set antenna must be within the line of sight of____
 AF  the ATC 1 bottom antenna.
 AF
 AF  (b) Connect the test set antenna to the test set.
 AF  (c) Push the POWER key on the test set.
 AF
 AF  NOTE: For information regarding battery testing, timing, and____
 AF  recharging, refer to operation setion of the IFR 601
 AF  test set operator's manual.
 AF
 AF  (d) Push the SELF TEST key on the test set.
 AF  (e) Push the RUN/STOP key to start the self test.
 AF  1) Make sure the test set display shows PASSED.
 AF  (f) Push the SETUP key on the self test.
 AF  (g) Measure the distance between the ATC antennas and the test set
 AF  antenna in feet.
 AF  (h) Put the measured distance value into the RANGE field for the
 AF  top and bottom entry.
 AF  (i) Put the height, measured from the ground up, of the top ATC
 AF  antenna into the HEIGHT field for the TOP antenna entry.

 EFFECTIVITY AF AF, AT, GN, MD, AND VM  CONFIG 2 AF ALL AIRPLANES WITH AEB  ATG A Page 503 AF 34-587 AND AEB 34-607  Apr 25/96

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 AF  (j) Put the height, measured from the ground up, of the bottom ATC
 AF  antenna into the HEIGHT field for the BOTTOM antenna entry.
 AF
 AF  NOTE: You must use the top and the bottom antenna for the____
 AF  system test to be completed.
 AF
 AF  (k) Choose the bottom antenna on the SELECTED field.
 AF  (l) Put the gain of the test set antenna in the 1030_ and 1090_
 AF  GAIN field.
 AF
 AF  NOTE: Gain is indicated rear of antenna____
 AF
 AF  (m) Put the loss of the cable in the LOSS field.
 AF
 AF  NOTE: Gain is indicated on the cable.____
 AF
 AF  (n) Use the SLEW keys to change the values.
 AF  (o) Use the SELECT keys to change the items.
 AF  (p) Use the SELECT keys to select the antenna which you must test.
 AF  (q) Push the POWER key on the test set to save batteries.
 AF  E.  Prepare for the No. 1 ATC System Test.
 AF  (1) Open circuit breaker ATC 2 on P7 panel.
 AF  (2) On the ATC control panel, set the switches as follows:
 AF  (a) Select switch on STBY.
 AF  (b) Set code 0001.
 AF  (c) Altitude reporting to OFF.
 AF  (3) Connect the Pitot/Static test set to the Captains static system.
 AF  (4) Set the captains altimeter to 29.92 inches of mercury.
 AF  (5) Apply static pressure with the air data set to get the altitude of
 AF  40,000 feet.
 AF  F.  ATC No. 1 System
 AF
 AF  Test PART I - ATC Bottom Antenna
 AF  (1) On the ATC control panel do these steps.
 AF  (a) Set the function selector to 1
 AF  (b) Set the ALT RPTG switch to ON
 AF  (c) Set the ATC ID code to 0001
 AF  (2) Push the POWER key on the test set.
 AF  (3) Push the AUTO TEST key on the test set.
 AF  (4) Use the RUN/STOP key to start or stop individual test.
 AF  (5) Use the SELECT key to select each individual test.
 AF  (6) Do a check of the REPLY DELAY TEST.
 AF  (a) Make sure the replay delay is 128.00.S (|0.25.S) for mode S and
 AF  ITM.
 AF  (b) Make sure the reply delay is 3.00.S (|0.5.S)for ATC A and C.
 AF  (7) Do a check of the REPLY JITTER TEST.
 AF  (a) Make sure the reply jitter is < or = 0.05.S for mode S.
 AF  (b) Make sure the reply jitter is < or = 0.06.S for ITM A and C.
 AF  (c) Make sure the reply jitter is < or = 0.1.S for ATC A and C.
 AF  (8) Do a check of the ATCRBS REPLY TEST.

 EFFECTIVITY

 AF AF, AT, GN, MD, AND VM  CONFIG 2 AF ALL AIRPLANES WITH AEB  ATG A Page 504 AF 34-587 AND AEB 34-607  Apr 25/96

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 AF (a) Make sure the spacing of the F1 to F2 pulse is 20.3.S
 AF (|0.10.S).
 AF (b) Make sure the duration of the F1, F2 pulse is 0.45.S (|0.10.S).
 AF (c) Make sure the mode A identity and mode C altitude are
　
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