SRS Labs SR445A, Руководство пользователя

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SR445A Specifications
Specification Min
Typ Max Units
Inputs (driven by 50 Ω source)
Input signal level -200 +200 mV
Impedance 49.5 50 50.5 Ω
Return loss 32 dB
Offset -500 0 +500 µV
Offset drift -10 +10 µV/°C
Bias current (note 1) 3 10 µA
Protection (dc) -4 +4 Vdc
Protection (1µS transient) -50 +50 V
Recovery time (10×FS overload) 3 nS
Noise (10Hz) 22 nV/ √ Hz
Noise (100Hz) 8.6 nV/ √ Hz
Noise (> 1kHz) 5.2 nV/ √ Hz
Noise (1Hz to 300MHz BW) 80 µVrms
Crosstalk (CH1 out to CH2 in) -61 dB
Crosstalk (CH2 out to CH1 in) -82 dB
Amplifier
Gain (note 2) 4.95 5.00 5.05 V/V
Bandwidth (-3dB) 350 MHz
Rise/fall time 1.3 nS
Propagation delay 2.7 nS
Outputs (driving 50 Ω )
Source impedance (note 3) 49.5 50 50.5 Ω
Linear operation -1.0 +1.0 V
Overload level -1.3 +1.3 V
Limit level -1.6 +1.6 V
General
Number of Channels 4
Operating temperature 0 40 ºC
Mains voltage 90-132 175-264 Vac
Mains power 15 Watts
Mains frequency 47 63 Hz
Dimensions 8.35” 1.70” 8.10” W×H×D
Notes:
1. The input bias current flows out of the unit, creating a positive offset of about 150µV on the 50 Ω
input termination. This offset will be affected by the dc impedance of the source that is connected
to the input.
2. Amplifier gain is calibrated by applying a known current to the input and measuring the voltage
into a high impedance load. The gain is adjusted so that a 1mA source applied to the input
produces a 500mV voltage at the unloaded output.
3. Channel 1 may be set to either 500 Ω or 50.5 Ω via a front panel switch.