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Широкополосный синхронный усилитель Signal Recovery 7280

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Синхронный усилитель с цифровой обработкой сигнала SR 7280 является многоцелевым устройством с исключительно высокими характеристиками. Прямая цифровая демодуляция сигнала во всей полосе до 2,0 МГц, постоянные времени выходных фильтров до 1 мксек и частота дискретизации основного АЦП 7,5 МГц  позволили создать идеальный инструмент для работы с быстро изменяющимися сигналами. При этом, в отличие от других высокочастотных синхронных усилителей, SR 7280 способен функционировать и в традиционной для подобных изделий звуковой полосе частот.

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Signal Channel
Voltage Input
Modes A only, -B only or Differential (A-B)
Full-scale Sensitivity
0.5 Hz ≤ F ≤ 250 kHz 10 nV to 1 V in a 1-2-5 sequence
250 kHz < F ≤ 2.0 MHz 100 nV to 1 V in a 1-2-5 sequence
Max. Dynamic Reserve > 100 dB
Impedance 100 MΩ // 25 pF
Maximum Safe Input 20 V pk-pk
Voltage Noise 5 nV/√Hz @ 1 kHz
C.M.R.R. > 100 dB @ 1 kHz
Frequency Response 0.5 Hz to 2.0 MHz
Gain Accuracy ±0.3% typ, ±0.6% max. (full bandwidth)
Distortion -90 dB THD (60 dB AC gain, 1 kHz)
Line Filter attenuates 50, 60, 100, 120 Hz
Grounding BNC shields can be grounded or floated via 1 kΩ to ground
Current Input
Mode Low Noise, Normal or Wide Bandwidth
Full-scale Sensitivity
Low Noise 10 fA to 10 nA in a 1-2-5 sequence
Normal 10 fA to 1 µA in a 1-2-5 sequence
Wide Bandwidth
F ≤ 250 kHz 1 pA to 100 µA in a 1-2-5 sequence
F > 250 kHz 10 pA to 100 µA in a 1-2-5 sequence
Max. Dynamic Reserve > 100 dB
Frequency Response (-3 dB):
Low Noise ≥ 500 Hz
Normal ≥ 50 kHz
Wide Bandwidth ≥ 1 MHz
Impedance
Low Noise < 2.5 kΩ @ 100 Hz
Normal < 250 Ω @ 1 kHz
Wide Bandwidth < 25 Ω @ 10 kHz
Noise
Low Noise 13 fA/√Hz @ 500 Hz
Normal 130 fA/√Hz @ 1 kHz
Wide Bandwidth 1.3 pA/√Hz @ 1 kHz
Gain Accuracy ± 0.6% typ, midband
Line Filter attenuates 50, 60, 100, 120 Hz
Grounding BNC shield can be grounded or floated via 1 kΩ to ground
Reference Channel
TTL Input
Frequency Range 0.5 Hz to 2.0 MHz
Analog Input
Impedance 1 MΩ // 30 pF
Sinusoidal Input Level 1.0 V rms*
Frequency Range 0.5 Hz to 2.0 MHz
Squarewave Input Level 250 mV rms
Frequency Range 2 Hz to 2 MHz
*Note: Lower levels can be used with the analog input at the expense of increased phase errors
Phase Set Resolution 0.001° increments
Phase Noise at 100 ms TC, 12 dB/octave slope:
Internal Reference < 0.0001° rms
External Reference < 0.01° rms @ 1 kHz
Orthogonality 90° ± 0.0001°
Acquisition Time
Internal Reference instantaneous acquisition
External Reference 2 cycles + 50 ms
Reference Frequency Meter Resolution 1 ppm or 1 mHz, whichever is the greater
Demodulator and Output Processing
Output Filters
X, Y and R outputs only
Time Constant 1 µs to 1 ms in a 1-2-5 sequence, and 4 ms
Slope (roll-off) 6 and 12 dB/octave
All outputs
Time Constant 500 µs to 100 ks in a 1-2-5 sequence
Slope 6, 12, 18 and 24 dB/octave
Synchronous Filter Available for F < 20 Hz
Offset Auto and Manual on X and/or Y: ±300% full-scale
Absolute Phase Measurement Accuracy ≤ 0.01°
Oscillator
Frequency
Range 0.5 Hz to 2.0 MHz
Setting Resolution 1 mHz
Absolute Accuracy ± 50 ppm
Distortion (THD) -80 dB @ 1 kHz and 100 mV rms
Amplitude (rms)
Range 1 mV to 1 V
Setting Resolution 1 mV
Accuracy ±0.2%
Stability 50 ppm/°C
Output Impedance 50 Ω
Sweep
Amplitude Sweep
Output Range 0.000 to 1.000 V rms
Law Linear
Step Rate 20 Hz maximum (50 ms/step)
Frequency Sweep
Output Range 0.5 Hz to 2.0 MHz
Law Linear or Logarithmic
Step Rate 1 kHz maximum (1 ms/step) @ output time constant settings of 500 µs or longer; 140 ms/point otherwise
Outputs
Main Analog (CH1 and CH2) Outputs:
Function X, Y, R, Θ, Noise, Ratio, Log Ratio and User Equations 1 & 2.
Amplitude ±2.5 V full-scale; linear to ±300% full-scale
Impedance 1 kΩ
Update Rate
X, Y or R @ TC £ 4 ms 7.5 MHz
All outputs @ TC ³ 500 µs 1 kHz
Reference Output
Waveform 0 to 3 V rectangular wave, active in External Reference Mode only
Impedance TTL-compatible
Power - Low Voltage ±15 V at 100 mA rear panel 5-pin 180° DIN connector for powering SIGNAL RECOVERY preamplifiers
General
Power Requirements
Voltage 110/120/220/240 VAC
Frequency 50/60 Hz
Power 200 VA max
Dimensions
Width 17¼" (435 mm)
Depth 19" (485 mm)
Height
With feet 6" (150 mm)
Without feet 5¼" (130mm)
Weight 25.4 lb (11.5 kg)