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30kHz, 9kHz.
4.4.
FREQ
The [Frequency] key on the front panel is used to set parameters related to the signal/spectrum analyzer frequency, including [Center
Frequency], [Start Frequency], [Stop Frequency], [CF Step Auto ON OFF], [Frequency Offset]. User can configure the frequency
measurement scope through the [Start Frequency] and [Stop Frequency], or through the [Center Frequency] and [Span]. Press the
[Frequency] key to enable any soft menu from [Center Frequency], [Start Frequency] and [Stop Frequency], and corresponding
parameter input area will display current parameters.
Following diagram gives a direct view of the menu structure
[Center Freq]
Menu description: to enable the center frequency and set the signal/spectrum analyzer into the center frequency/span mode. Use
number keys, stepping keys or knob to change the center frequency. If the set center frequency is inconsistent with the current span, the
settings will automatically adjusted to the value best suitable for desired frequency
[Start Freq]
Menu description: to enable the start frequency and set the signal/spectrum analyzer into the start frequency/stop frequency mode. Use
number keys, stepping keys or knob to change the start frequency. In changing the start frequency, if the selected start frequency is
larger than the stop frequency, the latter one will automatically increase till equaling to the sum of start frequency plus minimum span
[Stop Freq]
Menu description: to enable the stop frequency and set the signal/spectrum analyzer into the start frequency/stop frequency mode. Use
number keys, stepping keys or knob to change the stop frequency. In changing stop frequency, if the selected stop frequency is less than
the start frequency, the latter one will automatically decrease till equaling to the difference of stop frequency minus minimum span.
[CF Step Auto Manual]
Menu description:
to change the steps of center frequency, start frequency or stop frequency.
When the center frequency is active,
press the step key, the frequency step changes 1/10 of the span. When it is under Manual mode, use the number keys, stepping keys or
knob for change. At this time, reactivate the [Center Frequency], and press the step key, the center frequency will change by setting step.
This function is very useful to quickly change the center frequency to the input signal harmonic. For example, observe the harmonic of
