Aeroflex ATC-1400A-2 - XPDR;DME Window Width and Positioning Procedure

MAI NTENANCE MANUAL
ATC-1400A-2
2-2-2
Page 2 8
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
(8) XPDR/DME Win d o w W idth a n d Pos i t i o nin g
PREREQUISITES : 2-2- 2 D ( 1 ) P ower S u p p l y
TEST E Q UI P ME N T : 1 D u a l P ulse Ge n e r a tor
1 GPIB Cont r o l l er
1 Osci l l o sc o p e
1 50 Ω Coa x i a l Cabl e ( B NC to B N C )
1 50 Ω Coax i a l Cable ( B N C t o SMA)
1 50 Ω BNC T e e C o nnec t o r
1 Computer/ C o n t r o ller ( G P I B Mode)
SET-UP DIAGRAM:
DUAL PULSE
GEN
OUT
TRIG
T
CH BCH A
SCOPE
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
7506009
TO VIDEO ASSEMBLY (TP3501)
MHz
NMi
KTS
CODE
NMi
XPDR Wi n d o w Wid t h a nd P o s i tion i n g Cali b r a tion T e st S e t u p Dia g r a m
Figu r e 35
N O T E : Dur i n g per f o r mance o f t his p r o cedu r e , if a c ert a i n co n d i tio n o r sp e c i fic a t i on
cann o t b e ve r i f ied, r e f er t o a ppro p r i a te a s sembly t e s t p r o c e dur e i n 2-2 - 4 for
test i n g an d r e pai r o f fa u l t y as s e m b l y.
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
MAN/AUTO/MAN STEP Switc h M A N
DISPLAY S E L E C T Contro l X P D R C O D E
FREQ/FUNCT I ON S E L E C T Thumbwhee l s 1 0 9 0 M H z - X
DECODER WIDE/NARROW Switc h N A R R O W
SELF-IN T E R R / O F F Switch O F F
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 5 .
3. S e t POWER S w i t c h to O N 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 5 0 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 12.00 µs
5. Ver i f y "F" i s not d i spl a y e d in l e ft-mos t d i g it of D ME-P R F H z /XPDR-%R E P L Y
Disp l a y .