C.3. SPECIFICATION OF SVAN 958A AS 1/1, 1/3 OCTAVE AND FFT ANALYSER
C.3.1. Specification of SVAN 958A as 1/1 octave, 1/3 octave and FFT analyser in the standard
configuration for sound inputs
Statement of performance
SVAN 9758A can operate as 1/1 octave or 1/3 octave analyser with all listed below accessories meeting
requirements of the IEC 61260-1:2014 standard for the pass band filters for the Class 1 Group X instruments.
SLM function is provided by the TNC/IEPE inputs using the SC 26 cable for Channel 4 and the SC 49 cable
providing LEMO 4-pins to 3 x TNC connection for Channels 1-3.
Note: Simultaneously to the frequency analysis, SVAN 958A operates as a Sound Level Meter -
see Chapter C.1 for specification.
Configuration of the complete analyser
SVAN 958A sound & vibration level meter and analyser
SV 12L microphone preamplifier
SC 26 extension cable for SV 12L
SC 49 LEMO 4-pins to 3 x TNC socket adapter
ST 02 adapter (input impedance 18 pF)
Normal operating mode
SVAN 958A in configuration with the SV 12L microphone preamplifier, ST 02 adapter for all channels and the
additional SC 49 cable for Channels 1-3 and with following settings: High or Low measurement range,
microphone compensation set to Free Field (path: <Menu> / Channel Setup / Channel x – see Chapter
4.2).
Signal input
● SV 12L preamplifier throughout the ST 02 adapter and the SC 49 cable for Channels 1-3
● Maximum input voltage: SVAN 958A meets the requirements IEC 348 for the 2
nd
class device. The input
voltage shall not exceed the limits between 0 V and +28 V.
● Impedance: 18 pF.
Digital filters
Weighting filters
• LIN according to IEC 61672-1:2013 for Class 1 for “Z” filters
• A according to IEC 651 and IEC 61672-1:2013 for Class 1
• C according to IEC 651 and IEC 61672-1:2013 for Class 1
• HP high-pass filter
See Chapter C.4 for filters characteristics.
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