■..■ -y.',
;^gfX
Calibration-—
T ype 1130
This marker
This marker
on graticule
x cm
on 9ral ' cu'e
Percent nonlinearity
rr:
----------
X
100
8 cm
Fig. 6-6. Linearity measurement.
3. Check Dispersion Accuracy of M H z /C M
Ranges and Range of IF CENTER FREQ
Control
a. Test equipment setup is given in step 2.
b. Center the IF CENTER FREQ controls.
c. Check the dispersion accuracy for the
M H z /C M
set
ting of the DISPERSION selector as listed in
Table 6-1. I he
Horizontal Position control or the IF
CENTER FRcQ
control
may be used to align the prime markers to the graticule
divisions. The RESOLUTION control should remain in
the
coupled position as the
DISPERSION
selection is decreased
and the sweep rate should be reduced to optimize marker
definition.
d. Check the frequency range, dispersion accuracy and
linearity over the IF CENTER FREQ control range in the 5, 2,
1, .5 and .2 MHz positions of the DISPERSION selector. See
Fig. 6-5.
Range of the control should be equal or exceed + and
— 25 M Hz from its centered position.
It is checked by
rotating the control to both extreme positions from center,
and noting the frequency shift of the .1 /.is or 10 MHz mark
ers as the control is rotated. Dispersion accuracy and dis
play linearity must remain within the listed specifications of
Table 6-1 to the + and — 25 M Hz positions.
e. Center the IF CENTER FREQ control. Set the DISPER
SIO N control to .1 M Hz position. Apply 10 ns and 1 jus
markers from the Time-Mark Generator.
f.
Check— The range of the FINE IF CENTER FREQ con
trol Must equal or exceed + and — 1 MHz.
TABLE 6-1
DISPERSION
Position
M a rk e r Selector
M arke rs/C m
A llo w a b le
Error
S upplem entary
Notes
10 M Hz
10 ns and .1 jus
1
± 3 %
Dispersion over 100 MHz
with the IF CENTER FREQ
control (000).
5 M Hz
10 ns and .1 jus
1 marker/2
centimeters
± 3 %
Over the range of the
IF CENTER FREQ control
( ± 2 5 MHz). Display lin
earity over a 10 centi-
meter display must be
within ± 3 % .
2 M Hz
10 ns and .5 jus
1
± 5 %
1 M Hz
10 ns and 1 jus
1
± 7 %
.5 M Hz
10 ns and 1 jus
1 marker/2
centimeters
± 1 0 %
.2 M Hz
10 ns and 5 jus
1
± 1 5 %
NOTES
A
©
Содержание 1L30
Страница 48: ...si L i y n Maintenance Type 1L30 Fig 4 15 Honeycomb assembly drcui a n d component layout 4 n ...
Страница 59: ...Fig 6 1 A Test equipment required for calibration ...
Страница 60: ... Calibration Type 1130 ...
Страница 120: ...T Y P E I L 3 0 S P E C T R U M A N A L Y Z E R ib i IF SYSTEM BLOCK DIAGRAM 9 1 9 2 ...
Страница 127: ......