Aeroflex ATC-1400A-2 - Page 42

MAI NTENANCE MANUAL
ATC-1400A-2
2-2-2
Page 4 2
Subj e c t to E x p o rt Con t r o l, s e e C o ver P a g e fo r d e tail s . F e b 2/ 0 9
STEP PROCEDURE
26. Set FR E Q/ F U N C T I ON SELEC T T h u m b w h eels t o 1 15 5 M H z Y . Ve r i f y fre q u e ncy
on XMTR F R E Q MHz D i s p lay i s wit h i n ±20 k H z of f r e que n c y in S t e p 2 1 .
27. Set F
2
/P
2
F
1
/P
1
Swit c h t o F
2
/P
2
. Ve r i f y fr e q u ency d i s pla y e d on X MT R F R E Q
MHz Disp l a y is s a m e a s r e c o rde d i n S t e p 26.
28. Set FR E Q/ F U N C T I ON SELEC T T h u m b w h eels t o 1 090 X P D R , F
2
/P
2
F
1
/P
1
Switc h
to F
1
/P
1
and P R F / S Q T R O N / O F F Switch t o ON. Ve r i f y fr e q u e ncy o n X MTR
FREQ Hz D i s p la y i s wi t h i n ±50 k H z o f fr e q uen c y i n S t e p 19.
29. Rota t e R F LEV E L C ontro l u n til 1 0 0 0 W ( ±1 0 0 W ) i s d i spl a y e d on X M T R P W R
WATT S D i s pla y . Veri f y freq u e n cy o n X MTR FREQ MHz Dis p l a y is w i t h in
±50 k Hz o f fr e q u enc y i n St e p 19.
30. Rota t e R F LEV E L C ontro l u n til 5 0 0 W (±50 W ) is d i s p laye d o n XMTR P W R
WATTS D i s p lay .
31. Set X P D R P U L SE W I D T H T h umbwheels t o 0.5 5 . Veri f y f requ e n c y on X M T R
FREQ MHz Disp l a y i s w i t hi n ±5 0 kHz o f fre q u e ncy i n St e p 1 9.
32. Set X P D R P U L SE W I D T H T h umbwheels t o 0.3 5 . Veri f y f requ e n c y on X M T R
FREQ MHz Disp l a y i s w i t hi n ±5 0 kHz o f fre q u e ncy i n St e p 1 9.
33. Set X P D R P U L SE W I D T H T h umbwheels t o 0.3 0 . Veri f y f requ e n c y on X M T R
FREQ MHz Disp l a y i s w i t hi n ±5 0 kHz o f fre q u e ncy i n St e p 1 9.
34. Set X P D R P U L SE W I D T H T h umbwheels t o 0.4 5 .
35. Set X P D R M o d e Contr o l t o Mode A . A f ter D i s c rimina t o r loc k s on, s e t F
2
/P
2
F
1
/P
1
Swit c h t o F
2
/P
2
. Rec o r d dc l e vel d i s pla y e d on Os c i l los c o p e f o r l ate r
refe r e n c e.
36. Wh i l e moni t o r ing O s c i llo s c o pe d i s pla y , set ∆F T h u m b w h e els t o 1.0 0 +
∆ and
veri f y dc l e v e l sh i f t s ap p r o ximate l y 1 V f r o m leve l r e cor d e d in S t e p 35 .
37. Wh i l e moni t o r ing O s c i llo s c o pe d i s pla y , set ∆F T h u m b w h e els t o 1.0 0 - ∆ and
veri f y dc l e v e l sh i f t s ap p r o ximate l y -1 V f r om lev e l r eco r d e d in S t e p 3 5 .
38. Usi n g BNC Tee C o n nect o r , con n e c t 5 0 Ω L o ad p a r all e l w i th Os c i l los c o p e.
39. Set ∆F T humbwh e e l s to O F F . Reco r d dc l e v el d i s p la y e d on Os c i l los c o p e f o r
later r e f eren c e .
40. Wh i l e moni t o r ing O s c i llo s c o pe, s e t ∆F T h umbwhe e l s to + ∆ a nd v e r i fy d c lev e l
shif t s appr o x i mately + 0 .5 V f r o m leve l r ecor d e d in S t e p 39 .
41. Wh i l e moni t o r ing O s c i llo s c o pe, s e t ∆F T h umbwhe e l s to - ∆ a n d v e r i fy d c l eve l
shif t s appr o x i mately - 0 .5 V f r o m leve l r ecor d e d in S t e p 39 .
42. Rep l a c e 5 0 Ω T e r minat i o n s on T P 3 501 a n d J22 .
43. Set POW E R S w i t ch t o O F F .
44. Dis c o n nec t t e st e q u ipment .