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HP 8340b Operating Instructions

HP 8340b
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Frequency
Marker
Keys
DESCRIPTION
This
key
group
selects
the
five
markers,
the
marker
functions
(MARKER
SWEEP,
MARKER
DELTA,
and
MARKER
TO
CENTER
FREQUENCY),
and
several
diagnostic
functions
that
are
used
during
servicing.
PANEL
LAYOUT
FUNCTIONS
[M1]...[M5](HP-IB:
M1...M5)
keys
select
markers
1-5.
Press
one
[M1]...[M5]
key,
and
the
present
value
of
that
marker
will
appear
in
the
ENTRY
DISPLAY.
Use
either
the
rotary
[KNOB],
the
[STEP]
keys,
or
the
numerical
keys
with
a
terminator
key
to
set
the
desired
marker
frequency.
Repeat
this
process
for
the
other
markers
as
needed.
If
the
initial
marker
frequency
is
outside
of
the
current
sweep
range,
a
slight
turn
of
the
[KNOB]
will
bring
the
frequency
of
that
marker
to
the
center
fre¬
quency
of
the
sweep,
markers
are
normally
displayed
as
z-axis
intensity
dots
but
can
be
changed
to
amplitude
"dips”
(an
abrupt
discontinuity
in
the
sweep
trace)
by
pressing
[AMTD
MKR],
as
explained
in
Figure
3-17.
The
markers
are
functional
whenever
their
individual
LEDs
are
lighted;
however,
only
one
marker
can
be
"active”
at
a
time
(the
"active”
marker
is
shown
in
the
ENTRY
DISPLAY,
and
can
be
changed
via
[KNOB],
[STEP]
keys,
or
numerical
keys
with
a
terminator
key).
Press
any
marker
key
to
make
that
marker
active.
After
[INSTR
PRESET]
all
markers
are
initialized
to
13.255
GHz
on
the
HP
8340B
and
9.995
GHz
on
the
HP
8341B;
otherwise,
the
last-used
marker
values
will
be
remembered
by
the
HP
8340B/41B
(for
up
to
three
years),
even
with
disconnected
ac
power.
[SHIFT]
[Ml]
(HP-IB:
SHM1)
is
a
service
diagnostic
that
shows
(from
left
to
right),
the
M
divisor,
N
divisor,
M/N
frequency,
and
20/30
loop
frequency.
Consult
the
In
Case
of
Difficulty
section
for
addi¬
tional
information.
[SHIFT]
[M2]
(HP-IB:
SHM2)
is
a
service
diagnostic
that
shows
(from
left
to
right),
the
band
number
and
the
YIG
oscillator
(YO)
frequency.
Consult
the
In
Case
of
Difficulty
section
for
additional
informa¬
tion.
[SHIFT]
[M3]
(HP-IB:
SHM3)
is
a
service
diagnostic
that
shows,
from
left
to
right,
the
PLL
#2
VCO
frequency
and
the
PLL
#3
upconverter
frequency.
Consult
the
In
Case
of
Difficulty
section
for
addi¬
tional
information.
Figure
3-9.
Frequency
Marker
Keys
(1
of
2)
3-24
Operating
Information
HP
8340B/41B

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HP 8340b Specifications

General IconGeneral
BrandHP
Model8340b
CategoryInverter
LanguageEnglish

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