Aeroflex ATC-1400A-2 - Page 15

MAI NTENANCE MANUAL
ATC-1400A-2
2-2-2
Page 1 5
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
41. Set FR E Q/ F U N C T I ON SELEC T T h u m b w h eels t o 1 200 MHz .
42. Wh i l e tun i n g Spe c t r um Anal y z e r ce n t er f r e quen c y fro m 3 5 0 to 1 8 0 0 MHz, ve r i f y
any o r all s p u rs a p p ear i n g on d i s pla y a re 6 0 d Bc.
43. Set FR E Q/ F U N C T I ON SELEC T T h u m b w h eels t o 1 034 MHz .
44. Set S p e ctru m A n a l yzer c e n ter f r e qu e n c y to 8 3 4 MHz a n d ver i f y al l s pur s
appe a r i ng o n disp l a y ar e 6 0 dB c .
45. Set FR E Q/ F U N C T I ON SELEC T T h u m b w h eels t o 1 124 MHz .
46. Set S p e ctru m A n a l yzer c e n ter f r e qu e n c y to 9 2 4 MHz a n d ver i f y al l s pur s
appe a r i ng o n disp l a y ar e 6 0 dB c .
47. Set FR E Q/ F U N C T I ON SELEC T T h u m b w h eels t o 1 213 MHz .
48. Set S p e ctru m A n a l yzer c e n ter f r e qu e n c y to 1 0 13 MHz a n d ve r i f y a l l spu r s
appe a r i ng o n disp l a y ar e 6 0 dB c .
49. Set A T C - 1 400 A - 2 cont r o l s as f o l l ows:
CONTROL SETTING
RF LEV E L C o ntrol 0 dBm
PRF/SQTR T h u m b w h e els 2700
FREQ/FUNCTI ON S E L E C T Thumbwhee l s 109 0 M H z X
50. Set S p ectr u m A n a lyz e r c ontr o l s as f o l l ows:
CONTROL SETTING
RF Inp u t Leve l 0 dB m
Fre q u e ncy T u nin g 109 0 M H z
Fre q S p an/ D i v 200 k H z
Resol u t ion C o n t rol 100 k H z
dB/Div 10 d B
Time/Div As r e q u i red
51. Conn e c t Spe c t r u m Anal y z e r to R F I / O Connec t o r .
52. Ad j u s t fr e q u e ncy t u ning o n Spe c t r um Anal y z er s o c ent e r of d i s pla y e d sig n a l is
cent e r e d on d i spla y . Var y R F LE V E L Con t r o l so d i s pla y s i gna l i s at t o p
grat i c u le. R e c ord a m p l i tud e o f di s p l aye d s igna l .
53. Set C W / N O R M / O F F S w itch t o N O R M. R e c ord a m p l i tud e o f di s p l ayed s i gna l a t
±800 k H z f rom ce n t e r f r e q uen c y .
54. Su b t r act a m p l i tude o f sig n a l not e d in S t e p 55 f r o m cent e r freq u e n cy l e v e l.
Veri f y lev e l d iff e r e nce i s >60 d B c .
55. Set POWE R S w i t ch t o O F F .
56. Dis c o n nec t t e st e q u ipment .