Bosch IRIS-Net User Manual page 215

IRIS-Net
Parameters For Impedance Measurement
Element
Bosch Security Systems B.V.
300 Ohm 0.0 Ohm...70
kOhm
1.0 0hm 0.0 Ohm...70
kOhm
Default Range
-40 dB -45...-5 dB
20 Hz 20 Hz...20
kHz
20 kHz 20 Hz...20
kHz
10% 5%...50%
HIGH THRESH sets the upper limit of the allowable
impedance range (= minimum load). Once this value is
exceeded, an OPEN fault message (line interrupt) appears
in the Amplifier Control Panel.
LOW THRESH sets the lower limit of the allowable
impedance range (= maximum load). Once this value is
fallen short of, a SHORTED fault message (line short-
circuit) appears in the Amplifier Control Panel.
Description
GEN. LEVEL sets the generator level for speaker impedance
testing.
CAUTION: Extremely high levels during measurement may
result in seriously damaging connected components.
SWEEP START sets the start frequency of the sine-sweep
signal for speaker impedance testing.
SWEEP STOP sets the stop frequency of the sine-sweep
signal for speaker impedance testing.
Clicking the START TEST soft-key launches the speaker
impedance test. The generated sine-sweep signal sweeps
over the previously defined frequency range. The graph of the
measured impedance values is indicated in the Load plot
display. Clicking this soft-key again cancels the test at any
time.
Clicking the SET REF. CH. A and/or SET REF. CH. B soft-key
saves the last test as reference. Clicking the CLEAR REF. CH.
A and/or CLEAR REF. CH. B soft-key clears the corresponding
reference. TOLERANCE defines the allowable deviation of the
impedance graph. Actual measured test results and saved
tolerance ranges are being compared during system check. A
fault message is displayed if any point of the actual
measurement falls outside of this tolerance range. The
tolerance range is graphically displayed as spread in the
corresponding color that surrounds the reference graph.
User Manual
REMOTE AMPLIFIER | en
2017.05 | 3.20 | F.01U.119.956
215