Aeroflex ATC-1400A-2 - Counter Time Base Calibration Procedure

MAI NTENANCE MANUAL
ATC-1400A-2
2-2-2
Page 1 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
(2) Counter T i m e Base
PREREQUISITES : 2-2- 2 D ( 1 ) P ower S u p p l y
TEST E Q UI P ME N T : 1 F r e quenc y C o u n ter
1 50 Ω Coax i a l Cable ( B N C t o SMB)
SET-UP DIAGRAM:
OUTPUT
FREQUENCY
COUNTER
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
00
0
+
0 0 0
0 0 0
0 0 0 0
50 OHM COAXIAL CABLE
TO COUNTER ASSEMBLY
(TP6101)
7506004
MHz
NMi
KTS
CODE
NMi
Counte r T ime Ba s e C a libr a t i o n Te s t Setu p D i a gra m
Figu r e 28
NOTE: 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 pr 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. 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 2 8 .
2. S et AT C - 1 4 0 0 A-2 P OW E R S w i t c h to O N . V erif y A T C-1400A - 2 f ront p a n el
disp l a ys a r e in a c c orda n c e wit h p ower- u p sel f t e st i n 2 -2-4 , T able 5 5 .
3. Allo w a 1 0 minut e w a r m-up p e r i od.
4. Ver i f y fre q u e ncy d i spl a y e d o n F r equ e n cy Co u n t er i s 5 MHz (±3 Hz ) . Adj u s t
C6105 ( C o u n ter A s s e mbly) ( 2 - 2 -2, F i gure 2 6 ) as n e e ded f o r prop e r freq u e n cy.
5. S e t POWER S w i t c h to OF F .
6. Disco n n e ct t e s t eq u i p ment.