CHAPTER 11
Specifications
119
Sound Intensity Phase Match
(only for using intensity filter)
Complies with IEC 1043 standard Class 1 and ANSI S1.12– 1995 Class 1
using Brüel & Kjær Sound Intensity Probes (0.017° @ 50 Hz)
Channels Matched
7537, 7539: 4 and 5
3039, 3039 B: 5 and 6
3038, 3038 B: 5 and 6, 11 and 12
All channels
From 2005: All channels
Frequency Range
Guaranteed Phase
Match
Typical Phase
Match
Guaranteed Phase
Match
Typical Phase
Match
50 Hz – 250 Hz ±0.017°±0.005°±0.017°±0.005°
250 Hz – 2.5 kHz 0.017°×(f/250) ±0.005° 0.017°×(f/250) ±0.005°
2.5 kHz – 6.4 kHz ±0.17°±0.08°±0.17°±0.08°
Common Mode Rejection Guaranteed Typical Guaranteed Typical
0 – 120Hz 70dB 80dB 70dB 80dB
120 Hz – 1 kHz 55 dB 60 dB 55 dB 60 dB
1 kHz – 25.6 kHz 30 dB 40 dB 30 dB 40 dB
Absolute Max. Common Mode Voltage ±5V
peak
without damage
±3V
peak
without clipping
If common mode voltage exceeds the max. value, care must be taken to limit the
signal ground current in order to prevent damage. Maximum is 100 mA. The
instrument will limit the voltage to the stated max. “without damage” common mode
value
Anti-aliasing Filter
At least 90 dB
attenuation of those
frequencies which
can cause aliasing
Filter Type 3rd order Butterworth
–0.1 dB @ 25.6 kHz
–3 dB @ 100 kHz
Slope –18 dB/octave
Supply for Microphone Preamplifiers ±14.0 V, 10 mA per channel (max. 20 mA if only 1 to 3 channels used)
Supply for Microphone Polarization 200 V ±1 V, or 0 V
Supply for DeltaTron/ICP
®
/CCLD 4 mA from 24 V source
If any DeltaTron/ICP
®
/CCLD-coupled channel is parallelled with another channel, this
must also be DeltaTron/ICP
®
/CCLD-coupled. Otherwise the signal might be clipped
by the parallelled channel
Tacho Supply (on BNT connectors) 6.5 V, max. 100 mA
Analog Special Functions Microphone Charge Injection Calibration: All modules with 7-pin LEMO support
CIC via dedicated application software and OLE interface
Analog Self-test: Functional Check
Transducers: Supports IEEE 1451.4 capable transducers with standardised TEDS
Overload Detection
b
Signal overload
CCLD overload: Detection of cable break or short-circuit + detection of CCLD
transducer working point fault
Microphone preamplifier overload: Detection of microphone preamplifier current
consumption too high or too low
Common mode voltage overload
b. In Direct AC mode, care must be taken when measuring signals with a very high DC component – a DC + AC level exceeding
approximately 12 V can be clipped and an overload will not be indicated.
Specifications – Input Channels, Standard 24-bit and Dyn-X (Continued)
Standard 24-bit
7537/37-A/39/39-A
3038/38-B/39/39-B
3560-B-010/020/030/040
Dyn-X
7538/38-A/40/40-A
3040/40-B/41/41-B
3560-B-110/120/130/140
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