HP 339A - Page 118

8
of
8
MANUAL
CHANGES
Model
339A
Paragraph
5-17a
should
read,
'
Sat
the
frequency
of
the
239A to
10Hz
(1.0
x 10).
Adjust
the
output
level
for
a
full scale
meter
in-
dication
on
the
instrument
under
test.'
Paragraph
5-17a
should
have
added
to
the
end
of it,
'This
reading
must be
>-9JdB.'
Paragraph
5-18. Under
Equipment
Required,
Low
Distortion
Oscillator,
(-hp-Model
339A)
should
read
'(-hp-
Model
239A)'.
Paragraph
5-18e
should
read,
'
Adjust
the
239A
signal
source
to
pro-
vide a
10kHz,
IV
signal.'
Page
5-715-8.
Figsre
5-3. Switch
the
part
designators
and
adjustment
descriptions
on
A2R37
and
A2R1 7
shown
in the
lower
left
corner
of
the drawing.
CHANGE NO.
39
(effective
on
serial
numbers
2025A04006
thru
2025A04160)
Page
6-7, Table
6-3. Change
the
part
number of
A3Q100
from
J^-0458
to
1855-0269.
This change
was
made
because
the
vendor
discontinued
the
part.
CHANGE
NO. 40
(applies to
ail
instruments!
(effective
on
serial
numbers
2025A04161
and
above)
Page
6-7,
Table
6-3. Change
the
part number
of A3Q100
from
1855-0269
to
1855-0230.
Page
4-8, Table
4-5.
Change
the
table to
read as
below.
339A
Frequency
THD
Specification
10
Hz
100
Hz
1
kHz
10
kHz
20
kHz
30
kHz
50
kHz
80
kHz
109
kHz
<
-93
dB
<
-93
dB
<
-93
dB
<
-93
dB
<
-
93
dB
<
-85
dB
<
-80
dB
<
-
70 dB
<
-65
dB
Note:
The
change
to
this
table
reflects
the
specification
change
and
a
change
in
relative
symbols
which
was
an
error
in the
original
manuscript
(-94 dB
is
less
than,
not
>,
-93
dB).
Page
4-10, Table
4-6. Change
all
"greater
than"
signs
to
"<’
•
(See
note
above.)
Page
4-15.
Performance
Test
Record.
Oscillator
Total
Harmonic
Distortion
Test:.
Change
the
table
to
read as
below:
This shange
was
made
because
the
input
circuit
has Detter
distor-
tion
performance
with
a
depletion
mode
MOSFET.
This part
should
be
used
in all
instruments.
Page
6-5.
Table
6-3.
Change
the
part
number
and
value
of
A2R1
6
from
0757-0422.
909
ohms to
0757-0420.
750
ohms.
Change
the
part
number
and
value
of
A2R1 7
from
2100-321
2.
200
ohms
to
2100-0554,
500
ohms.
Page
8-19/8-20. Figure
8-16.
Change
the
schematic
value
of R 1
6
from
909 to
750 and
that
of
R17
from 200
to 500.
This
change
was
made
to
give control
over
a
larger
percentage
of
full scale
deflection
of the meter.
This
allows
meters to be
used
from the
full
range
of
the
meter
specification.
NGE NO.
41 (applies to
all
instruments)
Page
6-5.
Table
6-3.
Under
A2K1
.
change
HOLD
DOWN
SPRING
1460-1581
to
RELAY
HIDDNSP
1460-1612.
Page 1-3.
Table
1-1
In
the
OSCILLATOR
section
under
Distortion,
change
the table of
specifications
to
read
as
below.
10
Hz to 20
kHz
20
kHz to 30
kHz
30
kHz
to
50
kHz
50
kHz
to
80
kHz
80
kHz
to 110 kHz
<
-93
dB
!0.0022%)THD
<
-85
dB
(0.0056%)THD
<
-80
dB
(0.01 %ITHD
<
-
70 dB
(0.032%ITHD
<
-65
dB
(0.056%)THD
339A
Output
Frequency
Calculated
THD
Test
j
Limit
|
10 Hz
-93
dB
100
Hz
-93
dB
!
1 kHz
-93
dB
10
kHz
-93
dB
i
20
kHz
93
cB
1
30
kHz
-85
dB
50
kHz —
-80
dB
80
kHz
-70
dB
109
kHz
—
-65
dB
I