1
Chapter 1
Introduction
General Description
The
Series
8320
Tenuline
Attenuator
are
low
reflection
resistance
networks
for
use
in
reducing
RF
power
in
50
ohm
transmission
lines
by
known
and
controlled
amounts.
See
.
Over
the
frequency
range
of
DC
to
500
MHz,
the
power
output
will
be
reduced
by
30
dB
(99.9
percent)
±
0.5
dB.
Up
to
500
MHz,
the
input
VSWR
will
not
exceed
1.1
and
the
out
put
VSWR
1.15.These
attenuators
are
useful
for
lowering
a
high
input
RF
power
to
a
level
suitable
for
feeding
into
a
scope,
frequency
counter
or
similar
device.
They
are
self
‐
contained
instruments
that
require
no
external
source
of
power
or
utility
service.
All
models
are
portable
and
have
a
convenient
carrying
handle
nested
among
the
cooling
fins
on
the
top
side.
If
desired
the
attenuator
may
be
permanently
mounted,
see
.
Operating Environment
The
Tenuline
Attenuators
should
be
operated
in
a
dust
and
vibration
free
environment.
They
rely
only
on
ambient
air
currents,
these
attenuators
will
safely
absorb,
and
dissipate,
up
to
their
maximum
rated
input
power.
The
radiators
having
cooling
fins
spaced
evenly
along
their
lengths
to
efficiently
dissipate
heat
generated
during
operation.
Allow
at
least
6
inches
(150
mm)
of
clearance
around
the
unit
to
allow
sufficient
convection
air
currents
for
adequate
heat
dissipation.
The
ambient
temperature
range
should
remain
between
‐
40°C
and
+45°C
(
‐
40°F
and
113°F)
for
proper
operation.
See
for
the
rated
power,
dimensions
and
weight
of
the
attenuators.
