Filter
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MODEL
8559A
ADJUSTMENTS
TABLE
53.
FACTORY SELECTED COMPONENTS IN ALPHA
-
NUMERICALORDER
Reference
Designator
r-
Basis of Selection
Adjusts bias on DPM Clock Oscillator.
Selected to provide delay compensation
for main coil sweeps.
Adjusts YTO sweep linearity.
Adjusts YTO sweep linearity.
Selected to provide delay compensation
for FM coil swept spans.
Selected to optimize Main Coil Span
Accuracy.
Selected to optimize Main Coil Span
Accuracy.
Shifts adjustment range of
A8R34 REG.
Selected to set low end of sweep ramp.
Selected to set high end of sweep ramp.
Selected to optimize 1 kHz Bandwidth.
Selected to optimize 3 kHz Bandwidth.
Selected to optimize 10 kHz Bandwidth.
Selected to optimize 300 kHz Bandwidth.
Selected to optimize 1 MHz Bandwidth.
Selected to optimize 3 MHz Bandwidth.
Adjusts gain of Flatness Compensation
Amplifier to compensate for gain of
A1 2 flatness circuitry.
Selected to shift adjustment range of
A1
1C23. Should be same value as
A1 lC20.
Selected to shift adjustment range of
A1
1C23. Should be same value as
A1 lCl6.
Selected to shift adjustment range of
A1 1
C45. Should be same value as
A1 lC64.
Selected to shift adjustment range of
A1 1 C45. Should be same value as
A1 lC43.
Adjusts XTAL bandwidth amplitudes
relative to LC amplitudes.
Selected to give correct IF bandwidth for
RESOLUTION BW of 100 kHz.
Selected to give correct IF bandwidth for
RESOLUTION BW of 30
kHz.
Selected to shift adjustment range of
A1 1
R26.
Selected to give correct IF bandwidth for
RESOLUTION BW of 100 kHz.
Selected to give correct IF bandwidth for
RESOLUTION BW of 30 kHz.
Reference
Designator
Basis of Selection
Selected to equalize feedback between
LC stages (not field selectable).
Selected to optimize 3 MHz to 1 MHz
bandwidth amplitude and frequency
correlation.
Adjusts Band 3 breakpoint for frequency
response.
Shifts adjustment range of
A12R72 V1.
Shifts adjustment range of A12R7 1 V3
-
.
Shifts adjustment range of
A12R70 V3+.
Adjusts reference voltage to A12U2 for
diode bias.
Shifts adjustment range of
A12R83 V2
-
.
Shifts adjustment range of
A12R7 V2+.
Selected to shift adjustment range of
A13C23. Should be same value as
A13C20.
Selected to shift adjustment range of
A1
3C23. Should be same value as
A13C16.
Selected to shift adjustment range of
A1
3C45. Should be same value as
A1
3C64.
Selected to shift adjustment range of
A1
3C45. Should be same value as
A13C43.
Adjusts XTAL bandwidth amplitudes
relative to LC amplitutles.
Selected to give correct IF bandwidth for
RESOLUTION BW of 100 kHz.
Selected to give correct IF bandwidth for
RESOLUTION BW of 30 kHz.
Selected to shift adjustment range of
A1 3R2.
Selected to give correct IF bandwidth for
RESOLUTION BW of 100 kHz.
Selected to give correct IF bandwidth for
RESOLUTION BW of 30 kHz.
Selected to equalize feedback between
LC stages (not field selectable).
Selected to shift adjustment range of
A1
1R34.
Selected to shift adjustment range of
A1 lR34.
Selected to shift adjustment range of
A1 lR23.
Selected to provide increased range
adjustment for 1 dB offset circuit.