Larson Davis SoundTrack LxT, Руководство пользователя

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A-10 Technical Specifications LxT Manual
AC/DC Output
The purpose of the AC output is to drive a headset to listen to live and recorded sounds. It may be used
for other purposes, but may not function as expected as a source for additional analysis equipment.
The output is amplified for listening purposes and therefore is limited in its maximum output to be less
than the instrument’s maximum input level. For connection to external analysis equipment use the
adapter ADP015 and cable EXC006 to extract the signal directly from the preamplifier output. Using
the PRMLxT series preamplifiers puts a DC bias on the output of the BNC connector of the ADP015
of approxi 3.4 Volts.
AC Output Voltage Range

Vpeak maximum output
0.5 mV to 1.6 Vrms sine wave
(~70 dB dynamic range)
AC Output Gain
(relative to instrument input) + 39.2 dB
AC Output Frequency Weighting Signal is unweighted with frequency limitations imposed by
hardware design (see below)
AC Output Frequency Response 20 Hz to 23.6 kHz (-3 dB), R
L
= 10 k

21 Hz to 23.6 kHz (-3 dB), R
L
= 600

95 Hz to 23.6 kHz (-3 dB), R
L
= 16

AC Output Recommended Loads Headset with 16

or greater

speaker impedance
Resistive loads greater than 600

for maximum frequency
response range.
AC Output Impedance Low impedance headset speaker driver with 100

F coupling
capacitor. Z = 1.5 + 1592/f, where Z is output impedance in

(Ohms) and f is frequency in Hz.
Instrument readings are not affected by AC output loading,
although with a large signal output, a short circuit may draw
excessive power and cause the instrument to turn off
.
AC Output Phase and Delay - 180

relative to input, 128

s digital delay
DC Output Frequency Weighting Follows the SLM Frequency Weighting: A, C or Z
DC Output Time Weighting Follows the SLM Detector: F, S or I
Table A-9 AC/DC Output