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4. Amplitude menu
·[Reference level]:
Press [Amplitude]→ [Ref Level] and set it with number
keys on the front panel. Select [dBm], [-dBm], [mV] or [μ V] in the
frequency unit menu, or set the reference level with the [↑] or [↓] key or
knob.
·[Reference position]:
Press [Amplitude]→ [Ref Position], and select the
position of the reference line in the rectangular coordinate graph by
clicking corresponding number keys.
·[Atten Auto Man]:
Press [Amplitude]→[Atten Auto Man] to adjust the
input attenuation of the spectrum analyzer. In the AUTO mode, the input
attenuator is associated with reference level. Under Man Mode, use
number keys, stepping keys or knob to change the attenuation of the
attenuator. The attenuation range is 0dB to 50dB.
·[Scale/Division]:
Press [Amplitude]→[Scale/Div]. Adjust the size of the
vertical coordinate division on the screen, and set the value with number
keys on the front panel. Select the frequency unit, or set the value with the
[↑] or [↓] key or knob. The setting range is 0.1dB/division to 20dB/division.
The default setting is 10dB/division.
·[Scale Type Log Lin]:
Press [Amplitude]→ [Scale Type Log Lin], and set
the vertical-axis scale as the logarithmic or linear scale. The default
logarithmic scale is in dBm, while the default linear scale is in mV.
·[Amplitude unit]:
Press [Amplitude]→ [Units], and select the vertical-axis
unit, including [dBm], [dBmV], [dBuV], [Volt] and [Watt].
·[Pre-amplifier Off On]:
Turn on or off the pre-amplifier. This function
cannot be activated until the reference level is less than -40dBm.
[Special note]: The level of the input signal must be +13dBm or less
before the pre-amplifier is turned on; otherwise, the instrument will
be damaged.
