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Ivie ie-33 & ie-35 manual, Nic and (f)stc measurements, How make an nic measurment – Ivie IE-35 RTA - Real Time Analysis User Manual

Page 21: Real time nic or sniffer mode

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Ivie IE-33 & IE-35 Manual

page

21

Step 1- Under the "Function" menu select "RTA".

Step 1- Under the "Function" menu select "RTA"

Step 1- Store real time spectrum in
memory #1.

Step 2 - Press the "Subtract/STC"
button.

Step 3 - Select memory #1 in the "S1"
column and "R" in the "S2" column.

Step 4 - Press the (F)STC/NIC(S1-S2) button.

Step 2- Make certain the Average mode is set to "Average-P"
(File>Preferences>Power Average).

Source Room

Omnidirectional

Sound Source

Measurement

Points @1 Meter

from the wall

Receiving Room

Store RTA averaged

spectrum in Memory #1

Store RTA averaged

spectrum in Memory #2

Step 3- Turn on the sound source. In the Source room, go to a
position one meter away from the wall and press the "Average-P"
button. Move along the wall as samples are taken. Press the
"Pause" button when you reach the end of the wall.

Step 4- Store the Average to Memory #1 and then press the
"Count=" button to clear and reset the Average.

Step 6- Store the Average to Memory #2 and then press the "Count=" button to clear and reset the Average.

Step 7- Press the "Subtract/STC" button to bring up the Subtract/STC screen.

Step 8 - In the "S1" column select 1(which is memory #1) . In the "S2" column select 2 (which is memory #2).
Now press the (F)STC/NIC(S1-S2) button.

Step 9 - To return to the RTA screen press the "Subtract/STC" button and then the "Cancel" button.

Step 5- In the Receiving room, go to a position one meter away from the wall and press the "Average-P" button. Move
along the wall as samples are taken. Press the "Pause" button when you reach the end of the wall.

Store 2 Measurements and
press the "Subtract/STC button

Display the NIC Curve

and Value

Select the two memories

and press this button

The IE-33 can perfom "Real Time" NIC measurements. The real time spectrum measurement in the Receiver room is
subtracted from the spectrum of the Source room stored in memory #1. This mode is unique to Ivie. You can use it
as a "sniffer" to help locate leakage paths.

REAL TIME NIC or Sniffer Mode

How make an NIC measurment

Options

Options

Options

NIC and (F)STC Measurements

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