AOR SDU5600 Specifications download pdf (Page 30)

5-6 Calculation facility

Maximum value hold (MAX)

Press the FUNC +7 keys to activate this

facility, the legend MAX will be displayed

on the graticule section of the LCD.

Press the CLR key to exit from max hold.

Without the MAX feature being used, each

new sweep across the frequency spread

will renew the signal activities over and

over. However, with the MAX feature in

use each sweep will be retained as data is

built-up until the process ends. This is

particularly useful to detect intermittent

signals which come and go over a period

of time.

Averaged value (AVR)

Press the FUNC + 8 keys to activate this

facility, the legend AVR will be displayed

on the graticule section of the LCD.

You are required to enter a sampling cycle

between 2 and 31 to produce averaged

results.

Press the CLR key to exit.

This facility is designed to provide the plot

pattern which has been obtained by

averaging the detected signals repeated

over the number of times in the sampling

cycle. This facility enables the SDU5600

to produce a stable signal pattern even if

each signal is fluctuating in signal strength.

Median (MED)

Press the FUNC + 9 keys to activate this facility, the legend MED will be displayed on the graticule

section of the LCD. The plot is designed to provide the signal pattern based over a sampling cycle

of between 2 and 4 and is useful to plot impulse noise. The sampling cycle can be entered via the

ten-keys followed by ENT Press the CLR to exit.

Theory of median filter

AVR N = 31

FIRST SWEEP PLOT AS THE SWEEP PROGRESSES

SECOND SWEEP (1 + 2) / 2 = A

THIRD SWEEP (1 + 2 + 3) / 3 = B

:::

30TH SWEEP (1 + 2 + 3 + ..... 30) / 30 = A1

31ST SWEEP (1 + 2 + 3 + ..... 30 + 31) / 31 = B1

32ND SWEEP ((B1 X 31 / 32) + 32) / 32

Section 5-6

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AOR SDU5600 Specifications Page 30

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