HP 3336A - Page 106

Model
3336A/B/C
Performance
Tests
e.
The
objective
of
this
procedure
is
to
compare
the
reference
attenuator
against
the
3336
&
attenuator.
The
3336
is
tested
at
10,
20,
40,
and
70
dB
attenuation
levels.
Begin
each
test
by
setting
up
the
reference
attenuator
and
the
3336
to
the
levels
shown
in
the
table
below
under Step e.
TEST
REFERENCE
REFERENCE
10
dB
10
dB
—3
dBm
0
dB
20
dB
7
dBm
20
dB
—
13
dBm
0
dB
40
dB
7
dBm
40
dB
—
38
dBm
0
dB
70
dB
7
dBm
70
dB
—
63
dBm
0
dB
f.
Adjust
the
wave
analyzer
sensitivity
until
the
DVM
reads
approximately
4.6
volts.
g.
Observe
the
DVM
for
several
seconds
to
determine
the
average
reading
and
record
it
in
the
Performance
Test
Record
as
V1.
h.
Reduce
the
3336
level
to
the
value
shown
in
the
table
above
under
Step
h.
i.
Adjust
the
reference
attenuator
to
0
dB.
j.
Again
observe
the
DVM
and
record
the
average
value
in
the
Performance
Test
Record,
this
time
as
V2.
k.
Repeat
Steps
e
-
h
until
all
four
attenuation
levels
have
been
tested.
4-20.
Phase
Increment
Accuracy.
4-21.
This
performance
test
verifies
that
the
-hp-
3336
meets
the
Phase
Increment
Accuracy
specification
listed
in
Table
4-1.
Specification:
Any
phase
increment
will
be
within
0.2°
of
the
selected
value.
Required Equipment:
Electronic
Counter
-hp-
Model
5328A
with
Option
040
or
Option
041
75
ohm
Feedthru
Termination
-hp-
Model
11094B
a. Connect the REF OUT output, located on the 3336 (DUT) rear panel, to the B input of
the electronic counter. This will be the reference source against which phase increments will
be measured.
b. Connect the 3336 (DUT), 75 ohm output, to the A input of the electronic counter. Ter-
minate this output with a 75 ohm feedthru termination at the counter’s input.
c.
Set
the
3336
(DUT)
output
frequency
to
1
MHz
and
output
amplitude
to
+
7.00
dBm.
@
4-21