The Cursor And Zoom Features - Aaronia NF-5030S Manual

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Even though SPECTRAN instruments already are impressively accurate consi-

dering their price, in practice an even higher measurement inaccuracy than the

one specified for the instrument has to be assumed. There are various reasons

for this, such as temperature dependance, reproducability and many others.

This has to be taken into account at every measurement.

8.8 The cursor and zoom features

By rotating the Jog Dial, the cursor can be placed at any desired position on the

display. The readout on the large main display, the exposure limit display and

demodulation now EXCLUSIVELY represent the frequency at the current cursor

position! The current frequency and level display at the cursor position only get

updated after each sweep and are displayed in the first (leftmost) marker field.

Naturally, no auto marker functionality is available in this mode.

Once you have positioned the cursor, you can zoom into a signal by pressing

the Jog Dial. This will set the CENTER frequency to the current cursor positi-

on/frequency, halve the SPAN and initiate a new sweep. In other words, you

zoom into the signal by 50%. This procedure can be repeated as often as you

wish until the desired resolution has been reached. A very useful feature. But

please note that a zoom back out is not possible.

You can turn off the cursor by pressing the menu key twice.

ATTENTION: The cursor should NOT be used in HOLD mode, as it will not be

erased (just like the rest of the display) and thus produce an entirely "black" and

useless display very quickly!

In spectrum analysis mode, you can use the Jog Dial to

activate a cursor. This cursor allows you to determine the

exact frequency and signal strength at an arbitrary point

in the display. To activate the cursor, simply rotate the Jog

Dial and the cursor will appear as a thin line in the spec-

trum. To deactivate it, simply press the menu key twice.

The part of the display covered by the cursor gets drawn

in reverse colour, thereby preserving its information.

Frequency and level

at the current cursor position

Cursor

Parts of the graphic covered by

the cursor are drawn inverted

8.0 Correct measurement

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