NTi Audio Digirator DR2 - Manual (Page 31)

31
Linear PCM Test Signals
Chirp
Characteristics and use
A Chirp is the name for a signal whose frequency continually
changes over time (also known as continuous sweep). It is used
for the recording of frequency responses, the measurement of
impulse responses and the acoustic assessment of rooms.
Starting the Chirp signal
1. Select the START symbol with the rotary wheel.

If this is activated, it turns into a STOP symbol , which
will end the test signal when selected.
Chirp Signal modes
Using the “MODE” symbol, you can run the test signal in the
following modes:
Once-only : Plays the test signal once.
Continuous : Repeats the test signal after an adjustable
pause (tPAUSE).
Parameter
You can define the following parameters for this test signal:
Output level
The frequency display is purely for information only.
The current frequencies will be displayed here after the
start of the CHIRP test signal.
Configuration of the signal sequence.
t
t
PAUSE
t
SCALE
f
f
STOP
f
START
CHIRP
t
= LIN
t
SCALE
= LOG