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OPERATING INSTRUCTIONS
WARNING
Some operating conditions may pose an electrical shock
hazard. Know and observe the precautions described in the
"Test Instrument Safety" section.
1. Connect the AC Adapter to an ac outlet and plug into the
rear panel jack of the frequency counter.
2. Set the POWER/GATE TIME switch to 0.1S or 1.0 S.
a.
Use 0.1S for faster measurement of high
frequency signals. The update time of the
display is every 0.2 second. Resolution is 10Hz.
b.
Use 1.0S for measurement of low frequencies or
where highest resolution is needed. The update
time of the display is every 2 seconds.
Resolution is 1Hz.
3. Apply the 10Hz to 1000MHz signals to be measured to the
input jack.
CAUTION
To prevent damage to the unit, do not apply input voltage higher
"
that the limits listed in the
Specifications" section. Connect the
instrument ground lead only to zero volt points in the circuitunder
test. Attempting to "float" the unit may result in a shock hazard,
since the instrument ground is exposed at the front panel BNC
connector. If measuring ac line frequency, observe the
"
precautions listed in the
Line Voltage Measurement" paragraph.
4. Frequency is given b the front panel display. The decimal
point is automatically positioned.
a.
With a 1.0S gate time, readings below 1MHz are
given in decimal MHz, above 1MHz, they are in
whole megahertz. For example, 12KHz is
displayed as.012000, and 12MHz is 12.000000.
b.
With a 0.1S gate time, all readings are displayed
in MHz, and with oneless digit resolution. For
example, 12KHz is displayed as 0.01200, and
12MHzis 12.000000.
5. Measurement interval, or "gate time", is 1.0 second or 0. I
second. This is combined with an additional interval of equal
time for internal latching and resetting, for a total of 2
seconds between display updated when 1.OS gatetime is
selected or 0.2 seconds when 0.1S gate time is selected.
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