Amber 5500 - Page 17

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Amber
model
5500
Owner’s Manual
Version
07
Programmable
Audio
Measurement
System
Section 2
2.2
GENERATOR SECTION
The
generator
consists of a
programmable
frequency, high
performance
oscillator,
a
high power output amplifier,
a
program-
mable
output
attenuator and
configuration
switching.
If the
IMD
option
002 is
provided,
a second
low
frequency
oscillator is
included
as well as the
ability
to
generate
a twin tone
high
frequency signal.
Many generator parameters
are
set
by
mulfi-
ple key
strokes. The normal
syntax
of
data
entry
is :
PREFIX
—
DATA
-
TERMINATOR
The PREFIX establishes what is
going
to be
set such as
frequency
or
amplitude.
DATA is
entered as
a numeric value on the numeric
keyboard.
The
TERMINATOR,
typically
a
units
key,
functions as
an “ENTER”
key
and
executes the
just
entered
parameters.
As
soon as the
first
data
key
is
pushed,
the
right
hand
display changes
from its
previous
role
(of
frequency
indicator)
to a “data
entry”
indicator.
Digits
will enter at the
right
and
move left. When the
terminator
key
is
pushed,
the
display
clears and
reverts back
to its
previous
function.
2.2.1
GENERATOR
FREQUENCY
SELECTION
.
In all
modes,
except
the
optional
IMD
mode,
the
generator
may
be set
to
any frequency
between
10
Hz and
100
kHz. To
set the
gen-
erator to a
particular
frequency,
first
push
the
FREQUENCY
prefix key
followed
by
one to
fiVe data
keys
followed
by
the H2
or kHz
terminator
key.
For
example:
Bil
WEI
“E
m
The
right
hand
display
will
usually
be indicat-
ing
the
actual
measured
frequency
of the
oscillator
(if
OSC
input
is
selected or
INPUT
A or B contains
the
oscillator
signal
via the
device under
test).
The
measured
value will
almost
invariably
be
at least
slightly
different
from the
programmed
value
(or
user
entered
frequency).
Bear in
mind that
the
frequency
indication
is 5
digits
of
resolution,
a resolu-
tion of
0.01% while
the
oscillator is not a
synthesizer.
It
has a
typical
frequency
ac-
curacy
of i
1%,
normal
for a low
distortion.
RC
type
oscillator. The
frequency
meter
resolution is
100 times the
oscillator
frequen-
cy accuracy
and
will
tend to
magnifythe
appearance
of the
error.
The
user
can
see the
programmed
frequency
(rather
than the
measured
frequency)
by
pushing
and
holding
the
FREQUENCY
prefix
key.
'
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