381235 Ver. 1.5 3/01
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Data Hold Mode
To freeze the most recent reading on the LCD, press the HOLD button once. The HOLD
icon will alternately appear on the LCD with the held reading. To release the reading and
return the meter to normal operation, press the HOLD key again.
Relative Mode Measurements
To display the difference between a stored reading and actual measurements, press the
REL key once. The reading at the time of the REL key-press will be stored in memory. All
subsequent displays will represent the difference between the stored reading and the
actual measurement. Press the REL key again to return to normal operation. Note that the
RELATIVE function cannot be accessed if the meter is in Data Hold or Data Record
modes.
Data Recording (Min/Max/Avg) Mode
The DATA RECORDING mode permits the maximum, minimum, and average readings to
be stored and recalled. To start recording data, press the RECORD key once and the R.C.
icon will appear on the right side of the LCD. After the measurement session, press the
CALL key to begin recalling the stored data.
The 1st CALL key press shows the maximum reading and the ‘Hi’ icon alternately.
The 2nd CALL key press shows the minimum reading and the ‘Lo’ icon alternately.
The 3rd CALL key press shows the average reading and the ‘A’ icon alternately. (The
Average reading will continue to update every 10 samples).
To return to normal operation, press the RECORD key again.
Period Measurements
Input the signal to Ch. C.
Slide the Range selector switch to the PERIOD position.
Period measurements are taken the same as frequency measurements.
The input frequency range for the PERIOD function is: 10Hz to 10MHz.
The display will show 5 digits with ‘S’ for millisecond or ‘uS’ for microsecond units of time.
The principle of the period display is a calculation which uses the measured frequency in
Hz. Refer to the following equations for the calculation the meter uses to display PERIOD:
Period (in milliseconds) = 1000ms / frequency (in Hz)
Period (in microseconds) = 1,000,000 uS / frequency (in Hz)
Auto Power OFF
If the meter is not used (keys pressed, switches moved) for approx. 30 mins. the meter will
automatically power itself down to preserve battery life.
Over Range Indication
The LCD will indicate –oL—and meter will emit an audible tone if one of the following
conditions are met:
a. Input signal exceeds 10MHz in 10MHz range
b. Input signal exceeds 500MHz in 500MHz range
c. Input signal = 0 (no input connected) for the PERIOD range.
