EXT
DIODE
The
4
EXT
DIODE
5
key
enables
external
diode
leveling.
External
diode
leveling
is
a
method
of
automatic
level
control
(ALC)
of
the
output
signal
using
an
external
diode
detector
.
When
the
4
EXT
DIODE
5
key
is
pressed,
the
DIODE
annunciator
will
be
lit.
If
the
procedure
,
\T
o
Use
External
Diode
Detector
Leveling"
in
Chapter
3
has
been
followed
correctly
,
the
synthesizer
RF
output
will
be
externally
leveled
via
the
diode
detector
feedback
loop
.
External
Diode
Detector
Leveling
The
purpose
of
a
leveling
circuit
is
to
provide
constant
power
,
independent
of
the
load,
and
minimize
power
variations
versus
frequency
.
External
diode
detector
leveling
is
used
in
applications
where
it
is
desired
to
level
the
power
at
some
point
outside
the
synthesizer
with
an
external
diode
detector
.
When
frequency
dependent
losses
are
involved,
the
RF
output
power
at
the
end
of
the
signal
path
will
not
have
a
constant
amplitude
over
the
synthesizer
frequency
range
.
F
or
example
,
if
a
cable
is
used
at
the
output
of
the
synthesizer
that
has
a
constant
0.5
dB/GHz
loss
,
5
dB
of
attenuation
at
the
output
of
the
cable
occurs
after
a
10
GHz
frequency
increase
,
even
though
the
power
at
the
input
to
the
cable
is
constant.
By
externally
leveling
power
at
the
output
of
the
cable
,
the
synthesizer
would
increase
power
at
the
input
of
the
cable
to
produce
a
constant
power
level
at
the
output
of
the
cable
.
External
diode
detector
leveling
requires
that
external
equipment
be
connected
to
the
synthesizer
,
as
shown
in
Figure
6-1
.
6-16
Summary of Contents for HP 83711A
Page 3: ...User s Guide HP 83711A 12A and HP 83711B 12B Synthesized CW Generators...
Page 19: ...1 Installing and Verifying the Synthesizer...
Page 30: ...Installing and Verifying the Synthesizer...
Page 31: ...2 Performing Fundamental Synthesizer Operations...
Page 46: ...Performing Fundamental Synthesizer Operations...
Page 47: ...3 Generating Signals with the Synthesizer...
Page 70: ...Generating Signals with the Synthesizer...
Page 71: ...4 Speci cations and Options...
Page 94: ...Speci cations and Options...
Page 95: ...5 Front Rear Panel...
Page 108: ...Front Rear Panel Knob See Also 4 5 4 5 ENTRY OFF SYSTem KEY 5 14...
Page 111: ...Front Rear Panel Figure 5 6 Power Cable and Line Mains Plug Part Numbers 5 17...
Page 112: ...Front Rear Panel...
Page 113: ...6 Keys Shifted Functions...
Page 120: ...Keys Shifted Functions See Also 4 5 ENTRY OFF 4STEP SIZE5 6 8...
Page 122: ...Keys Shifted Functions See Also 4 5 ENTRY OFF 4STEP SIZE5 6 10...
Page 170: ...Keys Shifted Functions See Also 4 5 4 5 ENTRY OFF 6 58...
Page 171: ...7 Special Functions...
Page 189: ...8 Error Messages...
Page 229: ...9 Legal and Regulatory Information...
Page 239: ...Legal and Regulatory Information Assistance 9 12...
Page 241: ...Legal and Regulatory Information...
Page 242: ...Index...
Page 251: ......
