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Model 3314A
just the waveform until the bottom of the Square wave's
rising edge is on top of the Y-axis graticule. Note the
distance between the 10% and 90% points on the rising
edge. If the distance between the points is less than or
equal to
.9ст (note scope setting), the specification is
met.
. F. Set
the
Main
Triggering
function
of
the
Oscilloscope to negative.
G. Observe the trailing edge of the waveform. Note
the distance between the 90% and 10% points. If the
distance is less than or equal to .9cm, the test passes.
H. Set the Time/div setting on the Oscilloscope to
ius/cm.
I. Rotate the Oscilloscope's "Са!" knob (located on
the
VOLTS/DIV
knob)
counterclockwise
until
the
waveform is four divisions tall. The ''intensified'' por-
tion on the top of the wave should be <0.5V (1 minor
division).
4-9. SINE WAVE HARMONICS
This is a test to check the amplitude levels of the Sine
Wave Harmonics.
Specification:
20Hz to 50KHZ ......................
— 55dB
50kHz to 1.999MHz ..................
— 40dB
1.999MHz to 19.99MHz
..............
— 25dB
Equipment Required:
Spectrum Analyzer
High Frequency Spectrum Analyzer
Procedures:
A. Preset the 3314A.
B. Set the 3314A as follows:
Préqueley
e Svr sd
а ам азы 20.0Hz (Range 3)
Атар
йе 2:52
anini ERO
Cn
10Vp-p
PFUnCDUOD
iene
ee
hu sip
POSEE
Sine
Range Hold o sesto
br atop
Cha EC sao On
C. Connect the 3314A to the Spectrum Analyzer as
shown in Figure 4-9.
NOTE
To get to the frequencies listed in the follow-
ing ranges (see Tables 4-5, 4-6, 4-7), set the
3314A to the middle value in the range (i.e.
range 3, 100.0Hz),
activate Range Hold,
then use the Modify knob to select the fre-
quencies. Be sure that the frequency on the
3314A is set exactly as shown in the table,
Performance Tests
D. To verify that the Sine wave harmonics are within
specification, set the Spectrum Analyzer as follows:
1. Press "INSTR PRESET".
2. Press "БӨРІ,
LINE"
and adjust the
Control knob for a — 55 dB level.
3. Press "STOP ЕКЕО" and set it to 8
times the 3314A frequency setting.
4. Press "MARKER"
and using the Con-
trol knob, place it over the fundamental.
5. Press
"МКЕ- REF
LVL"
and wait
for the sweep to update the screen display.
E. Observe the harmonics displayed on the Spectrum
Analyzer and verify that they are below the —55dB
level.
F. Repeat steps D (parts 3-5) and E for the 3314A fre-
quency settings listed in Tables 4-5 and 4-6 whose har-
monic level specification is — 55dB.
G. Press
"INSTR
PRESET"
on
the
Spectrum
Analyzer.
H. Press "DSPL
LINE"
and adjust the Control
knob for a — 40dB level.
J. Repeat step D, parts 3-5 for the 3314A frequency
settings
listed
in Table
4-6
whose
harmonic
level
specification
is —40dB.
Verify that these levels are
within the specification.
J. Disconnect the 3314A from the Spectrum Analyzer.
K. To measure the harmonics of the frequencies listed
in Table 4-7, connect the 3314A to the High Frequency
Spectrum Analyzer as shown in Figure 4-9.
L. Set the frequency of the 3314A to 1.00MHz.
M. Set the High Frequency Spectrum Analyzer as
follows:
Input Капре.......................
+ 30dBm
вре
ids dev l
a Eben
Auto
Start Frequency .......................
IMHz
N. Measure 2nd through 7th harmonics.
O. Set the frequency on the 3314A to 10.00MHz, and
adjust the start frequency on the High Frequency Spec-
trum Analyzer to 10MHz.
P. Measure 2nd through 7th harmonics.
Q. Set the frequency on the 3314A to 19.99MHz, and
adjust the start frequency on the High Frequency Spec-
trum Analyzer to 19.99MHz.
R. Measure the 2nd through 7th harmonics.
4-11
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