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4.2 The AC output: Recording calibrated measurements
The AC output is proportional to the preamplifier output. This allows you to connect a Digital
Audio Tape (D.A.T) to this output with the CN-DAT cable and make a calibrated recording of
a measurement. To do this, follow this procedure:
1) Connect the SC-30 AC output to the D.A.T. recorder.
2) Adjust the input gain of the D.A.T. recorder and the output gain of the AC output (see
section 2.6.5) to adapt the measured signal range to the D.A.T. recording dynamic
range.
3) Begin recording.
4) Record a calibration signal, preferably by using the CB006 calibrator. It is enough to
record the 1 kHz and 94 dB tone generated by the calibrator.
5) Begin measuring.
6) Once the measurement is complete, record the calibration signal again.
The signal recorded in D.A.T. may be analysed later by adjusting the D.A.T. output and the
analysis equipment input stage in order to ensure that the calibration sign measurement is
correct.
The SC-30 AC output also allows you to hear which signal is being measured and to verify
whether it is being influenced by noises other than those being measured.
4.3 Print from the SLM
In order to print, the PRINTING option of the SC-30 menu must be activated. While it is
activated, it will not be possible to carry out serial communication with a PC. When you
switch the SC-30 off, the PRINTING option is automatically deactivated.
Real-time printout of the measured functions is available for the sound meter (S) and octave
band spectrum analyser (1/1) measurement modes.
The sound meter (S) mode prints out the three functions programmed as F1, F2 and F3
second by second:
The spectrum analyser mode prints out, each T, the spectral and global values with
frequency weightings A, C and Z: