Bose FreeSpace Business E4 II Series Service Manual page 7

Page and Aux/Mic Inputs (continued)
CMRR referred
to output:
Input sensitivity for
codec FS:
Gain, all settings:
Maximum input level:
THD+N:
Crosstalk at 1 kHz:
Crosstalk at 10 kHz:
Frequency response:
Sense Mic inputs
Source impedance:
Input impedance
differential:
Equivalent input noise at 60 dB,
at INA129 gains of 60
dB, 40 dB and 20 dB:
CMRR referred
to output:
Phantom power:
Input sensitivity for
codec FS:
Gain, all settings:
SPECIFICATIONS
Nominal Limits
90 dB >/= 70 dB
-60 dBV to +/-1 dB
+17 dBV
20 dB to +/-1 dB
-20 dB
+17 dBV >/= 10 dBV
.001% .01%
-90 dB </= -80 dB
-70 dB </= -60 dB
30 Hz to +0/-0.5 dB
20 kHz
Nominal Limits
200 Ohms 10 to 2k Ohm frequency response specification maintained
20k Ohm +5%
at 60 dB,
-127 dBV -125 dBV
at 40 dB, at 40 dB,
-115 dBV -112 dBV
at 20 dB, at 20 dB,
-96 dBV -93 dBV
90 dB >/= 60 dB
+12V +/-1V
-60 dBV to +/-1 dB
+20 dBV
-60 dB to +/-1 dB
+20 dB
Conditions
at 1 kHz, 60 dB gain, from source of nominal
200 Ohms
at 1 kHz
1 kHz, 50 Ohm source
THD+N </= 0.3%, 20-20 kHz, 0 dB gain
at +10 dBV output, 1 kHz, 60 dB gain
Reference 1 kHz, measured at 60 dB gain and
with 0 dBV output
Conditions
with sources over this range
at 1 kHz
A weighted RMS, 200 Ohm source termination
at 1 kHz, 60 dB gain, from source of nominal
200 Ohm
open circuit
at 1 kHz
1 kHz, 50 Ohm source
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