Aeroflex ATC-1400A-2 - Page 41

MAI NTENANCE MANUAL
ATC-1400A-2
2-2-2
Page 4 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
I
POWER
WATTS
MHz
UNIT UNDER TEST
XMTR PWR
XMTR FREQ
REPLY
Hz
XPDR-%
DME-PRF
DISPLAY SELECT
XPDR MODE
RANGE/VEL/ACCEL
XMTRGEN
NORMOUT
-1 NMiIN
R
A
E
L
C
D
A
O
L
FT/S/S
KTS
NMi
ACCELVEL
XXX.00XXX0.0
RNG
XXX.XX
RF I/O
OFF
NORM
CW
-dBm
RF LEVEL
F
FREQ / FUNCTION SELECT
VAR
SUPPRESSOR
OFFON
OFFON
SLS/ECHO
XPDR PULSE WIDTH
CALVAR
RATE
STEP
FREQ
OFF
STEP
MAN
MAN
AUTO
/
CAL O
CAL MARKS
1.45S
1.0S
SYNC
TAC
D
O
T
T
2
DME P DEV
-+
-
+
+
-
V
V
V V V
V
V
232
CALCALCAL
PPP
OFFON
32
XPDR P /P DEVPRF/SQTR
DBL INTERR / INTRF PULSE
PULSE WIDTH
INTRF
DISCRIMINATOR
1 1
F
/
PP
/
F
22
OFF
TONE CODE
IDENT
OFFON
TACAN
A
T
2
1
FEET
CODE
2
1
AC
AC
D
C
B
90
80
70
60
100
40
30
20
10
0
50
EFFICIENCY
DME REPLY
PRF SQTR Hz
FREQ
RANGE
VEL
XPDR
DME DIST
XPDR
000 0
OFF
00 000 0 0
OFF
0000 0
0
0
0
+
0 0 0
0 0 0
0 0 0 0
7506014
L-BAND
TO REAR PANEL (J22)
SCOPE
CH A CH B
T
AMP
MHz
NMi
KTS
CODE
NMi
Discr i m i n a tor F r e quen c y Calib r a t ion T e s t S e t u p Dia g r a m
Figu r e 40
STEP PROCEDURE
15. Set POW E R S w i t ch t o O N a n d al l o w 1 0 minu t e w a rm-up p e r i od.
16. 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 Y a nd a d j ust R F
LEVE L C o ntr o l u nti l a p pro x i m a t e ly 50 0 W is o n X M T R P WR W A T T S Displ a y .
17. Adj u s t R5302 ( O f f s et A d j u s t) ( 2 - 2 - 2, F i g u re 2 6 ) u ntil f r e quen c y o n XMTR F RE Q
MHz Displ a y i s eq u a l to f r e q uen c y o n DIS P L A Y SEL E C T R e adou t .
18. 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 , P R F /SQTR ON/OFF
Switc h t o ON and r o t a te R F L E V EL C o n t r ol u n t i l 500 W ( ±5 0 W) i s o n XMTR
PWR WATTS D i s p lay .
19. Adj u s t R531 3 ( N a r row P u l s e Offs e t A djus t ) (2-2 - 2 F igur e 2 6) u n t i l fre q u e ncy o n
XMTR FREQ MHz Dis p l a y is e q u a l to f r e quen c y o n DIS P L A Y SEL E C T R e a dout .
20. Set FR E Q/ F U N C T I ON SELEC T T h u m b w h eels t o 1 02 0 M H z Y a nd PRF/ S Q T R
ON/OFF Swit c h t o OFF. V e rify f r eque n c y on X M T R F R E Q M H z D i spl a y i s wit h i n
±20 kHz o f freq u e n c y on D I S P LAY S E L E CT Rea d o u t .
21. 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 q uen c y o n DIS P L A Y
SELE CT R e a d out. R e c ord f r e q uenc y .
22. Set P R F / SQTR Thu mbwh e e l s to 2 H z , PR F / S Q T R O N / O F F S witch t o O N a n d
SELF-IN T E R R / O F F Switc h t o O F F . Ve r i f y XMTR F R E Q M H z D i spla y i s with i n
±20 kHz o f freq u e n c y on D I S P LAY S E L E CT Rea d o u t .
23. Set FR E Q/ F U N C T I ON SELEC T T h u m b w h eels t o 1 02 0 M H z Y . Veri f y X M T R
FREQ MHz Disp l a y i s w i t hi n ±2 0 kHz o f f requ e n c y on D I S P L AY S E L E CT
Reado u t .
24. Set P R F / SQTR Thu mbwh e e l s to 1 0 2 .
25. Rota t e R F LEV E L C ontro l u n til 4 0 W (±5 W) i s on X MTR P W R W A TTS Di s p l ay.
Veri f y X MTR FRE Q MHz D i s p lay i s w ithi n ±2 0 kHz o f f req u e ncy i n Ste p 2 0 .