Input Sensitivity (Amplitude); Resolution Bandwidth (Rbw) - AOR SR2000A Instruction Manual

To mute the volume:
To mute the squelch:

6-1-7 Input sensitivity (amplitude)

This feature refers to the setup of the input sensitivity level of the SR2000A. There are 6
different levels of input sensitivity between 0dBm and –50dBm in 10dB steps.
Press the FUNC key, then press the KHz key to highlight the reference level (in reverse
contrast). Either adjust the level with the dial knob and validate with the MHz key, or enter
the value with the numeric keys as in the example below for a reference level of –30dBm.
FUNC + KHz
3
MHz
You may ignore zeros "0" following 3 in this example.
Any invalid entry will generate a beep, and the nearest value will be automatically selected
instead.

6-1-8 Resolution bandwidth (RBW)

The sampling filters may be selected from four (4) different bandwidths of 1KHz, 4KHz,
32KHz, 64KHz and 128KHz.
Press the RBW key to make the RBW display appear in reverse contrast. Rotate the dial
knob to select the desired value followed by MHz key to complete the sequence.
The two plots here show the results from monitoring the same signal (81.3MHz WFM)
but using 4KHz and 128KHz RBW bandwidth respectively. With narrower RBW, finer
signal activity can be observed. With wider RBW bandwidth, the resolution becomes coarse
but it can be better suited for signals with wide bandwidth such as FM broadcast signals.
Press the FUNC key, then press the VOL key. Or,
press and hold the VOL key for one second.
Press the FUNC key, then press the SQUELCH key. Or,
pressing the SQUELCH key for one second.
REFERENCE LEVEL
OBSERVATION WITH DIFFERENT AMPLITUDES
REFERENCE LEVEL
19