Before
Y
ou
Make
A
djustments
Recommended
T
est
Equipment
Refer
to
Chapter
5
for
a
list
of
test
equipment,
accessories
,
and
related
critical
specications
.
Refer
to
\Preparing
a
Static-Safe
W
ork
Station
"
in
Chapter
4
for
a
list
of
ESD
accessories
.
The
only
recommended
nonmetallic
tuning
tool
is
the
HP
part
number
8170-0033
ber
tuning
tool.
Never
force
an
adjustable
component,
especially
slug-tuned
inductors
or
variable
capacitors
.
If
the
cover
of
the
2nd
converter
is
removed
to
make
an
adjustment,
replace
it
with
an
HP
5022-1150
2nd
converter
test
cover
during
testing
to
assure
consistent
ground
connection
and
proper
converter
alignment.
Overall
A
djustment
Setup
The
basic
overall
setup
in
Figure
7-1
is
applicable
to
most
RF
section
adjustment
tests
.
A
djustments
require
that
the
HP
70908A
RF
section,
often
referred
to
as
the
DUT
(device-under-test),
be
connected
to
an
extender
cable
.
The
adjustment
setups
do
not
generally
show
the
LO
and
the
Tune
Span
connections
.
Setups
that
utilize
the
tune-span
ET
(electronic
tool)
have
alternate
connections
to
the
TUNE
SP
AN
and
1st
LO
IN
connectors
.
In
all
setups
that
receive
inputs
from
the
LO
module
rear
panel,
the
LO
module
must
meet
its
specications
for
the
particular
output.
CA
UTION
T
o
avoid
connector
damage
,
a
blown
mainframe
line
fuse
,
or
a
blown
module
fuse
,
the
mainframe
main
power
switch
must
be
set
to
OFF
before
connecting
or
disconnecting
the
extender
module
cable
.
1.
With
the
mainframe
line
switch
OFF
,
remove
the
HP
70908A
RF
section
from
the
mainframe
.
2.
Install
the
extender
module
in
the
mainframe
and
connect
the
HP
70908A
RF
section
to
the
extender
cable
.
3.
Connect
the
equipment
as
illustrated
in
the
appropriate
test
setup
,
and
then
set
the
mainframe
line
switch
to
ON.
Note
The
test
equipment
must
be
allowed
to
warm
up
for
30
minutes
before
proceeding
with
a
test.
4.
Load
and
run
the
appropriate
adjustment
routine
.
Refer
to
Chapter
2
for
information
about
running
the
software
.
External
Frequency
Reference
The
external
reference
symbol
on
an
a
adjustment
setup
diagram
indicates
that
the
HP
70000
Series
modular
spectrum
analyzer
system
and
equipment
such
as
sources
,
analyzers
,
and
frequency
counters
must
connect
to
the
same
frequency
standard.
(Refer
to
\External
Frequency
Reference
"
in
Chapter
6.)
HP-IB
Symbol
The
Hewlett-P
ackard
Interface
Bus
(HP-IB)
symbol
that
appears
on
the
adjustment
procedure
setups
indicates
that
the
controller
and
test
equipment
need
to
be
linked
together
with
HP-IB
cables
.
7-2
Adjustment
Procedures
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: ......