If
2nd
Converter
F
ails
If
A
djustment
12.
2nd
Converter
LO
F
eedthrough
F
ails
T
o
solve
this
problem:
1.
Refer
to
the
A
djustment
22.
2nd
Converter
Bandpass
Filter
Tune
.
If
the
3.3
GHz
feedthrough
cannot
be
adjusted
within
specication,
the
failure
is
most
likely
either
C2
feedthrough
cap
,
A8
321.4
MHz
matching
network ,
or
A7
2nd
mixer.
2.
If
necessary
,
obtain
service
from
Hewlett-P
ackard.
(Refer
to
\If
Y
ou
W
ant
Hewlett-P
ackard
to
Service
Y
our
RF
Section "
in
Chapter
1.)
If
A
djustment
13.
Sampler
IF
Out
DC
F
ails
T
o
solve
this
problem:
1.
Replace
the
A5
V
CO
sampler.
2.
If
necessary
,
obtain
service
from
Hewlett-P
ackard.
(Refer
to
\If
Y
ou
W
ant
Hewlett-P
ackard
to
Service
Y
our
RF
Section "
in
Chapter
1.)
If
A
djustment
14.
Sampler
IF
Out
A
C
F
ails
T
o
solve
this
problem:
1.
Replace
the
A5
V
CO
sampler.
2.
If
necessary
,
obtain
service
from
Hewlett-P
ackard.
(Refer
to
\If
Y
ou
W
ant
Hewlett-P
ackard
to
Service
Y
our
RF
Section "
in
Chapter
1.)
If
A
djustment
15.
Search
Oscillator
Duty
Cycle
and
P
eriod
F
ails
T
o
solve
this
problem:
1.
If
the
search
oscillator
does
not
work,
the
problem
is
most
likely
A9U1.
2.
If
necessary
,
obtain
service
from
Hewlett-P
ackard.
(Refer
to
\If
Y
ou
W
ant
Hewlett-P
ackard
to
Service
Y
our
RF
Section "
in
Chapter
1.)
If
A
djustment
16.
Search
Oscillator
Square
W
ave
Min/Max
F
ails
T
o
solve
this
problem:
1.
P
erform
A
djustment
15.
Search
Oscillator
Duty
Cycle
and
P
eriod.
2.
If
this
test
still
fails
after
adjusting
the
search
oscillator
,
the
problem
is
probably
on
the
A9
2nd
converter
PLL,
or
there
is
too
much
ac
and/or
dc
coming
out
of
the
A5
V
CO
sampler.
(Refer
to
the
sampler
ac
and
dc
tests
.)
3.
If
necessary
,
obtain
service
from
Hewlett-P
ackard.
(Refer
to
\If
Y
ou
W
ant
Hewlett-P
ackard
to
Service
Y
our
RF
Section "
in
Chapter
1.)
If
A
djustment
17.
Search
Oscillator
Tune
Line
P
eak
F
ails
T
o
solve
this
problem:
1.
If
A2R6
cannot
be
adjusted
to
stop
the
search
oscillator
,
there
is
probably
a
problem
with
the
phase-lock
loop
.
P
erform
the
phase
lock
check
in
the
following
adjustment.
2.
If
necessary
,
obtain
service
from
Hewlett-P
ackard.
(Refer
to
\If
Y
ou
W
ant
Hewlett-P
ackard
to
Service
Y
our
RF
Section "
in
Chapter
1.)
4-12
T
roubleshooting
Содержание 70908A
Страница 7: ...Servicing at a Glance vi ...
Страница 19: ......
Страница 44: ...Figure 2 1 Main Menu Softkeys Module Veri cation Software 2 19 ...
Страница 45: ...Figure 2 2 Mass Storage Menu and Parameter Menu Softkeys 2 20 Module Veri cation Software ...
Страница 46: ...Figure 2 3 Equipment Menu and HP MSIB Map Screen Menu Softkeys Module Veri cation Software 2 21 ...
Страница 47: ...Figure 2 4 Test Menu Softkeys 2 22 Module Veri cation Software ...
Страница 55: ......
Страница 61: ......
Страница 88: ...Troubleshooting the A1 Leveling Ampli er Figure 4 2 Notch Filter Waveform Troubleshooting 4 27 ...
Страница 94: ...Troubleshooting the A3 SYTFMD Figure 4 5 Discriminator Output Waveform Troubleshooting 4 33 ...
Страница 117: ...Overall Block Diagram of RF Section Back page for Foldout Goes Here This is just a place holder 4 56 Troubleshooting ...
Страница 125: ......
Страница 128: ...External Frequency Reference Figure 6 1 Preferred Frequency Reference Connections System Calibration 6 3 ...
Страница 130: ...External Frequency Reference Figure 6 4 Using an HP 8566B Spectrum Analyzer and a House Standard System Calibration 6 5 ...
Страница 139: ......
Страница 205: ......
Страница 209: ...Test 01 Flatness Figure 8 2 Equipment Setup for Test 01 Flatness 8 4 Module Veri cation Tests ...
Страница 253: ...Test 23 RF Input Return Loss Figure 8 25 Equipment Setup for Test 23 RF Input Return Loss 8 48 Module Veri cation Tests ...
Страница 257: ...Test 25 LO Input Return Loss Figure 8 27 Equipment Setup for Test 25 LO Input Return Loss 8 52 Module Veri cation Tests ...
Страница 267: ......
Страница 271: ...Front Panel Figure 9 2 Front Panel Removal Replacement 1 of 2 9 4 Replacing Major Assemblies ...
Страница 272: ...Front Panel Figure 9 3 Front Panel Removal Replacement 2 of 2 Replacing Major Assemblies 9 5 ...
Страница 274: ...Rear Panel Figure 9 4 Rear Panel Removal Replacement 1 or 2 Replacing Major Assemblies 9 7 ...
Страница 275: ...Rear Panel Figure 9 5 Rear Panel Removal Replacement 2 or 2 9 8 Replacing Major Assemblies ...
Страница 277: ...Bandpass Filter Figure 9 6 Bandpass Filter Removal Replacement 1 or 2 9 10 Replacing Major Assemblies ...
Страница 278: ...Bandpass Filter Figure 9 7 Bandpass Filter Removal Replacement 2 or 2 Replacing Major Assemblies 9 11 ...
Страница 280: ...A1 Leveling Ampli er Figure 9 8 A1 Leveling Ampli er Removal Replacement Replacing Major Assemblies 9 13 ...
Страница 282: ...A2 LO Multiplier Figure 9 9 A2 LO Multiplier Removal Replacement Replacing Major Assemblies 9 15 ...
Страница 284: ...A3 SYTFMD Figure 9 10 A3 SYTFMD Removal Replacement Replacing Major Assemblies 9 17 ...
Страница 286: ...A4 Input Attenuator Figure 9 11 A4 Input Attenuator Removal Replacement 1 of 2 Replacing Major Assemblies 9 19 ...
Страница 287: ...A4 Input Attenuator Figure 9 12 A4 Input Attenuator Removal Replacement 2 of 2 9 20 Replacing Major Assemblies ...
Страница 289: ...A5 VCO Sampler Figure 9 13 A5 VCO Sampler Removal Replacement 1 of 3 9 22 Replacing Major Assemblies ...
Страница 290: ...A5 VCO Sampler Figure 9 14 A5 VCO Sampler Removal Replacement 2 of 3 Replacing Major Assemblies 9 23 ...
Страница 291: ...A5 VCO Sampler Figure 9 15 A5 VCO Sampler Removal Replacement 3 of 3 9 24 Replacing Major Assemblies ...
Страница 294: ...A7 2nd Mixer Figure 9 17 A7 2nd Mixer Removal Replacement Replacing Major Assemblies 9 27 ...
Страница 298: ...A9 2nd Converter PLL Figure 9 19 A9 2nd Converter PLL Removal Replacement 1 of 2 Replacing Major Assemblies 9 31 ...
Страница 299: ...A9 2nd Converter PLL Figure 9 20 A9 2nd Converter PLL Removal Replacement 2 of 2 9 32 Replacing Major Assemblies ...
Страница 301: ...A10 Power Supply Driver Figure 9 21 A10 Power Supply Driver Removal Replacement 9 34 Replacing Major Assemblies ...
Страница 303: ...A11 Last Converter Figure 9 22 A11 Last Converter Removal Replacement 1 of 2 9 36 Replacing Major Assemblies ...
Страница 304: ...A11 Last Converter Figure 9 23 A11 Last Converter Removal Replacement 2 of 2 Replacing Major Assemblies 9 37 ...
Страница 309: ...A15 RF 1st Converter Figure 9 27 A15 RF 1st Converter Removal Replacement 9 42 Replacing Major Assemblies ...
Страница 311: ...A16 Low Pass Filter Figure 9 28 A16 Low Pass Filter Removal Replacement 9 44 Replacing Major Assemblies ...
Страница 313: ...A17 Low Pass Filter Figure 9 29 A17 Low Pass Filter Removal Replacement 9 46 Replacing Major Assemblies ...
Страница 329: ......