Aeroflex ATC-1400A-2 - Page 31

MAI NTENANCE MANUAL
ATC-1400A-2
2-2-2
Page 3 1
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
44. Ve r i f y s p a c ing b e t ween t w o pul s e s is 3 3 . 5 µs (±0. 4 µs ) .
45. Set D u a l Pul s e G e n erat o r C A L /Ver n i e r to C A L a nd o u t p ut p u l s e s p a c i ng f o r
38.5 µs.
46. Set D u a l Puls e G e n e r ator C A L / V erni e r S w itc h t o Ve r n i e r. I n c reas e o r de c r e a se
out p u t pul s e spa c i n g u n t i l a f l a shi n g "F " i s dis p l a y ed o n D M E - P RF Hz/ X P D R -
% REPL Y D i s play .
47. Ve r i f y s p a c ing b e t ween t w o pul s e s is 3 8 . 5 µs (±0. 4 µs ) .
48. Usi n g e xte r n a l co n t r o lle r i n GPIB Mod e , g o t o m o n i tor mo d e b y ke y i n g le t t e r 0
and W D C F 9 5 0 for w i d e wind o w . Veri f y T P40 3 i s hi g h ( inv a l i d pa i r dete c t i on) .
49. Set D u a l Pul s e Genera t o r CAL/Ve r n i er Con t r o l Swi t c h to CAL p o s itio n a n d
outp u t pul s e s pac i n g for 2 1 .5 µs.
50. Set D u a l Puls e G e n e r ator C A L / V erni e r S w itc h t o Ve r n i er. D e c r eas e o r inc r e a se
outp u t pul s e spa c i n g un t i l TP 4 0 3 goe s h igh .
51. Ve r i f y s p a c ing b e t ween t w o pul s e s is 2 1 . 5 µs (±0. 4 µs ) .
52. Set D u a l Pul s e G e n erat o r C A L /Ver n i e r to C A L a nd o u t p ut p u l s e s p a c i ng f o r
26.5 µs.
53. Set D u a l Puls e G e n e r ator C A L / V erni e r S w itc h t o Ve r n i e r. I n c reas e o r de c r e a se
outp u t pul s e spa c i n g un t i l TP 4 0 3 goe s h igh .
54. Ve r i f y s p a c ing b e t ween t w o pul s e s is 2 6 . 5 µs (±0. 4 µs ) .
55. Ty p e " Q" an d " !" t o r etur n t o lo c a l mode.
56. Set FR E Q/ F U N C T I ON SELEC T T h u m b w h eels t o 1 09 0 M H z X .
57. Se t D u a l Pu l s e Genera t o r CAL/V e r n i er S w i t c h to C A L a nd o u t p u t p u l s e spa c i n g
to 9 . 5 µs .
58. Set D u a l Puls e G e n e r ator C A L / V erni e r S w itc h t o Ve r n i er. D e c r eas e o r inc r e a se
out p u t pul s e spa c i n g u n t i l a f l a shi n g "F " i s di s p l a yed o n D M E - P RF Hz / X P D R -
%REPLY D i s p lay .
59. Ve r i f y s p a c ing b e t ween t w o pul s e s is 9 . 5 µs (±0.4 µs).
60. Se t D u a l Pu l s e Gener a t o r ou t p u t pu l s e spa c i n g to 1 4 .5 µs.
61. In c r e ase o r dec r e a se o u t p ut p u l se s p a c i n g unt i l a f l a s hin g " F" i s d is p l a yed o n
DME-PRF Hz/XP D R - % R E P L Y D i spla y .
62. Ve r i f y s p a c ing b e t ween t w o pul s e s is 1 4 . 5 µs (±0. 4 µs ) .
63. 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 a n d PRF/SQTR
Thu mbwh e e l s t o 1 0 00, P R F / SQTR ON/OFF Sw i t c h t o ON.
64. Tr i g g e r d u a l puls e g ener a t o r on r i s ing e d g e o f T
D Sync .
65. Ver i f y 100 i s dis p l a y ed o n D M E - P R F Hz/X P D R - % R EPLY D i s p lay.
66. Se t D u a l Pu l s e Gener a t o r ou t p u t pu l s e spac i n g for 2 0 .3 µs. V e rify " F " is n o t
disp l a y e d in l e f tmost d i g i t of DI S P L A Y SE L E C T Readou t .
67. Sl o w l y decr e a s e Dua l P ulse G e n e rato r out p u t pu l s e spa c i n g to t h res h o l d whe r e
"F" j u s t appe a r s on DI S P L A Y SE L E C T R e adou t .