Performance Tests Model
8904A
Characteristic Performance
Limits
AC Amplitude
Performance
Test
3
Conditions
sine wave
AC AMPLITUDE FLATNESS (EXCEPT OUTPUT
1
WITH OPTION
006)
Specification
Flatness
fO.l
'Yo
(fO.009
dB)
flo/o
(f0.09
dB)
>630
mVpp
into
50R;
0.1
Hz
to
100
kHz
>630
mVpp
into
500;
100
to
600
kHz
I
I
I
Description
The output of the Multifunction Synthesizer in connected directly to a thermal converter. The output
of the converter, which
is
a
dc voltage proportional to the rms input, is read on a digital voltmeter.
A
reference is determined with the Multifunction Synthesizer set to
1
kHz
at
0.7
Vrms into
50s2.
The
frequency is then changed and the deviation from the reference noted.
This
test
relies on the
flat
frequency response of the converter. The amount
of
deviation from the
reference level
at
various
frequencies
is
determined by incrementing the Multifunction Synthesizer's
amplitude until the reading
is
the same as for the reference then noting the total level change required.
NOTE
This
test does
not
verify
ac
amplitude flatness for Output
1
in instruments
with Option
006
(balanced output). Refer to Performance Test
4
for
thut
option. However,
if
the instrument
has
Option
002
and
006,
perform
the
portion of
this
test
for
Output
2.
Equipment
Digital Multimeter
................................................................
HP
3478A
Thermal Converter.
....................................
HP
11050A
or Ballentine Labs
1395A-1
The
thermal converter
is
susceptible to burnout
if
more
than
1
Vrms
is
applied
to
its
input. Be careful
when
changing the frequency of
the
Multifunction
Synthesizer
thut
the
amplitude does
not
inadvertently exceed
1
Vrms
(a
displuyed setting of
2.8
V
on the Multifunction Synthesizer).
4-10
Performance Test
3
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
To Next Page
