Aeroflex ATC-1400A-2 - Page 40

MAI NTENANCE MANUAL
ATC-1400A-2
2-2-2
Page 4 0
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
1. Set A T C - 1 4 00A- 2 c o ntro l s a s f o l l o ws:
CONTROL SETTING
CW/NORM/OFF Switc h NORM
SLS/ECHO ON/OFF S w i t c h OFF
XPDR PULSE WI D T H V A R / C A L Switch VAR
DME DEV P
2
/CAL Swi t c h CAL
XPDR DEV P
3
/CAL Swi t c h -.65
TO /TAC/TD Sw i t c h TO
PRF/SQTR ON/OFF S w i t c h OFF
F
2
/P
2
F
1
/P
1
Switc h F
1
/P
1
IDENT TONE/ OFF / C O D E S w i t ch OFF
TACAN ON/OFF S w i t c h OFF
XPDR MODE Contro l C
DISPLAY S E L E C T Contro l FREQ MHz
PRF/SQTR T h u m b w h e els 102
DBL INTERR/I N T R F P U L SE Th u mb w h e e l s OFF
FREQ/FUNCT I ON S E L E C T Thumbwhee l s 109 0 M H z Y
∆F T h u m b w h e els 1. 00 OF F
XPDR PULS E W I DTH Thu mbwh e e l s 0 . 4 5
DECODER WIDE/NARROW Switc h WIDE
SELF-IN T E R R / O F F Switch ON
2. Conne c t t est e q u ipment t o ATC-14 0 0 A -2 a s s h own i n 2 - 2-2 , F i gure 3 9 .
3. S e t POWER S w i t c h to ON a n d all o w 1 0 minut e w a r m-up pe r i o d.
4. Set Du a l Puls e G e n e rat o r c ont r o l s as f o l lows :
CONTROL SETTING
PRF Con t r o l 1 0 2 Hz
Amplitu d e C o ntro l -1.2 V P e ak
Puls e W idth C o n t rol 0.8 µs
Spac i n g Cont r o l 36 µs
5. Verif y P
1
pul s e is d i s pl a y e d o n O s c ill o s cop e .
6. S et F
2
/P
2
F
1
/P
1
Swit c h t o F
2
/P
2
.
7. Verif y P
2
pul s e is d i s pl a y e d o n O s c ill o s cop e .
NOTE: P
2
pul s e is p o s iti o n e d 3 6 µs afte r P
1
pul s e n ote d i n St e p 5 .
8. S e t FREQ/FU N C T I O N S ELECT T h u m b w h e e l s to 1 0 9 0 XPDR.
9. Set D u a l Pul s e G e n era t o r out p u t pul s e s pac i n g to 2 1 µs .
10. Ver i f y F
2
pul s e is d i s pl a y e d o n O s c ill o s cop e .
11. 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 9 µs. I n c r ement p u l se
spa c i n g th u m b w h e els t o 22. 4 µs . Ve r i f y F
2
pul s e is d i s pl a y e d o n O s c ill o s cop e
betwe e n 1 9.8 µs ( ±0 . 2 µs ) an d 2 2 µs (±0.4 µs).
12. Set F
2
/P
2
F
1
/P
1
Swit c h t o F
1
/P
1
. Ve r i f y F
1
pul s e is d i s pl a y e d o n O s c ill o s cop e .
13. Set POW E R S w i t ch t o O F F . Remove t e s t eq u i p ment fr o m A T C - 1 4 00A - 2 .
14. Conn e c t tes t e q uip men t t o AT C- 1 4 0 0 A-2 a s shown i n 2-2- 2 , F igu r e 4 0.