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&
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Capacitance --
Capacitance mode may be entered at any time by pressing the dial pushbutton when
Capacitance is displayed. Upon entry to the Capacitance mode, you will see the following typical
display for about ½ second:
Capacitance (pF)
Then, the capacitance display screen is shown, as illustrated below when a 120 pF capacitor is
connected to the RF output jack.
10,000.00
C = 126.4 pF
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The top line indicates the frequency
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The second line is the computed value for the load connected to the output jack.
Capacitance values that may be displayed must fall within the measurment range of the instrument.
Keeping in mind the 600-ohm maximum resistance or reactance specification for the antenna analyzer,
the display will only indicate a numeric value for the capacitance when its reactance is less than that
600-ohm spec. The equation used to compute the capacitance is: XC = 1/ (2 * pi * F * C).
When the frequency and/or capacitance is beyond the instrument’s capabilities, producing a value for
XC greater than 600 ohms, the display will indicate as shown below.
10,000.00
C = (Z>600)
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Inductance --
Inductance mode may be entered at any time by pressing the dial pushbutton when
Inductance is displayed. Upon entry to the Inductance mode, you will see the following typical display
for about ½ second:
Inductance (uH)
Then, the inductance display screen is shown, as illustrated below when a 2.2 uH capacitor is
connected to the RF output jack.
10,000.00
L = 2.2 uH
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The top line indicates the frequency
•
The second line is the computed value for the load connected to the output jack.
Inductance values that may be displayed must fall within the measurement range of the instrument.
Keeping in mind the 600-ohm maximum resistance or reactance specification for the antenna analyzer,
the display will only indicate a numeric value for the inductance when its reactance is less than that
600-ohm spec. The equation used to compute the inductance is: XL = 2 * pi * F * L
When the frequency and/or inductance is beyond the instrument’s capabilities, producing a value for
XL greater than 600 ohms, the display will indicate as shown below.
10,000.00
L = (Z>600)
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VFO –
The VFO mode may be entered at any time by pressing the dial pushbutton when VFO is
displayed. Upon entry to the VFO mode, you will see the following typical display:
10,000.00
VFO
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The top line indicates the frequency of the continuous signal available on the output
connector.
The feature that makes the VFO mode valuable is the constant signal being generated the selected
frequency. The impedance mode uses a technique of frequency shifting at ½-second intervals in order
to determine the sign of the reactance component. This frequency shifting makes the signal unusable
for purposes other than impedance measurement. When the signal is to be used as an external VFO,