HP 3314A - Page 62

Model 3314A
Performance Tests
3314
AC/DC DIGITAL
VOLTMETER
\
50 OHM
FEEDTHRU
TERMINA TION
NO CONNECTI ON
L~LII
110 HtL
III ttl
LLLLLL
11 L L L
to '" '" '" r
LLLLLL
I·LLL~~~:!j
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Figure 4-19. Sine Power Flatness Connections
4-20. SINE POWER FLATNESS
This test measures the X3 Output's power level at 30Vpp
and 10kHz. Using this as a power reference. various
power levels are measured at different frequencies to
determine power flatness. -
G. Reduce
the 3314A's amplitude to 8,41Vp-p and
record the thermal converter's
output voltage (V3 limit).
This corresponds to a 1.5dB change and is the high fre-
quency flatness limit.
H. Set the 3314A's amplitude back to 10Vp-p and set
the frequency to each of these values:
Required Equipment:
20Hz 50kHz
500kHz
1MHz
AC/DC Digital Voltmeter
50 Ohm Feedthrough Terrnmation
A 450 Ohm Serres Voltage Reducer consisting of'
1 4500 resistor, -hp- part number 0698-3510
1V Thermal Converter
Procedure:
A. Preset the 3314A.
L Measure and record the thermal converter's output
voltage (V20Hz. V50kHz, V500kHz, V1MHz).
J. Voltages
V20Hz and V50kHz should be within this
range:
o 1dB RANGE = Vref ± (Vref - VI lumtj
B. Set the 3314A as follows:
K. Voltage V500kHz should be Within this range:
•
."
Frequency 10kHz
Amplitude IOVp-p
C Connect the 50
Ohm Feedthrough Termination to
the 3314A's Main Output. Connect the Voltage Reducer
and Thermal Converter to the 3314A's X3 Output as
shown in Figure 4-19.
D, Set the digital voltmeter to rneasure
ve 0.007mVdc
and measure and record the thermal converter's output
voltage (Vref').
E. Reduce the 3314A's amplitude to 989Vp-p and
record the thermal converter's
output voltage (VI limit).
This corresponds to a 0 1dB change and is the low fre-
quency flatness limit.
F. Reduce the 3314A's amplitude to 9.44Vp-p
and
record the thermal converter's output voltage (V2 limit).
This corresponds to a O.5dB change and is the mid fre-
quency flatness limit.
O,5dB
RANGE = Vref ± (Vref - V2 limit)
L. Voltage V1MHz should be within this range:
1.5dB RANGE = Vref ± (Vref - V3 limit)
4-21. HARMONIC DISTORTION
This test measures the relative harmonic levels with a
spectrum analyzer.
Required equipment:
Spectrum Analyzer
50
Ohm Feedthrough Termination
A
500n Feedthrough Termination consisting of.
1 499U resistor, -hp- part number 0698-4123
4-23