Digital Signal Processing Reference
In-Depth Information
C.2.8
Cross-Channel Phase
•
Cross-channel phase accuracy: ±0.5 deg
(Same conditions as cross-channel amplitude)
C.2.9
Input
•
Input ranges (full scale)
Auto-range capability: +27 dBVrms (31.7 Vpk) to -51 dBVrms
(3.99 mVpk) in 2 dB steps
•
Maximum input levels
42 Vpk
•
Input impedance
1 M
Ω
±10%, 90
µ
F nominal
•
Low side to chassis impedance
1 M
±30% (typical)
Floating mode: <0.010
Ω
µ
F
Grounded mode: 100.
Ω
•
AC coupling rolloff
<3 dB rolloff at 1Hz
Source Impedance = 50
•
Common mode rejection ratio
Single tone at or below 1 kHz
-51 dBVrms to -11 dBVrms ranges: >75 dB typical
-9 dBVrms to +9 dBVrms ranges: >60 dB typical
+11 dBVrms to +27 dBVrms ranges: >50 dB typical
•
Common mode range (floating mode)
± 4V pk
•
IEPE transducer power supply
Current source: 4.25 ± 1.5 mA
Open circuit voltage: +26 to +32 Vdc
•
A-weight filter, type 0 tolerance
Conforms to ANSI standard S1.4-1983; and to IEC 651-1979;
10 Hz to 25.6 kHz
•
Crosstalk
Between input channels and source-to-input (receiving channel
source impedance = 50
˜
): <-135 dB below signal or <-80 dBfs
of receiving channel, whichever response is greater in amplitude
Ω
