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Синхронный усилитель двухфазный Signal Recovery 7265

Цена по запросу

Синхронный усилитель SR 7265 предлагает пользователю возможности двухфазного выделения поданного сигнала на опорной частоте, но также присущие только оборудованию SIGNAL RECOVERY возможности детектирования в режимах парных опорных сигналов и парных гармоник, позволяющим измерять сигналы одновременно на двух разных частотах (Dual Reference), а также тандемную демодуляцию. Синхронный усилитель SR 7265 также позволяет использовать режим виртуального опорного сигнала (Virtual Reference™), что в ряде случаев позволяет выполнять измерения без опорных сигналов.

Обладая рабочим диапазоном частот 1 мГц ÷ 250 кГц, модель 7265 обладает чувстительностью по напряжению до 2 нВ и по току до 2 фА во всём диапазоне. Прибор предлагает несколько режимов работы, специальные возможности по восстановлению сигнала или эксплуатацию в качестве векторного вольтметра, а использование методов цифровой обработки сигнала позволяет добиться исключительных рабочих характеристик.

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Характеристики

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General
Dual-phase DSP lock-in amplifier operating over a reference frequency range of 0.001 Hz to 250 kHz.

Wide range of extended measuring modes and auxiliary inputs and outputs.

User-upgradeable firmware.

Measurements Modes
The instrument can simultaneously show any four of these outputs on the front panel display:
X In-phase
Y Quadrature
R Magnitude
ø Phase Angle
Noise
Harmonic nF, n≤ 65, 536
Dual Harmonic
Simultaneously measures the signal at
two different harmonics F1 and F2of the
reference frequency
Dual Reference
Simultaneously measures the signal at
two different reference frequencies, F1
F2 where F1 is the external and F2the
internal reference
Frequency Range for Dual Harmonic and Dual Reference Modes
F1 and F2 ≤ 20 kHz
Virtual Reference
Locks to and detects a signal without a
reference (100 Hz ≤ F ≤ 250 kHz)
Noise
Measures noise in a given bandwidth
centered at the reference frequency F
Spectral Display
Gives a visual indication of the spectral
power distribution of the input signal in a
user-selected frequency range lying
between 1 Hz and 60 kHz. Note that
although the display is calibrated in
terms of frequency, it is not calibrated
for amplitude. Hence it is only intended
to assist in choosing the optimum
reference frequency
Display
240 x 64 pixel cold fluorescent backlit
LCD panel giving digital, analog bar-
graph and graphical indication of
measured signals. Menu system with
dynamic key function allocation. On-
screen context sensitive help
Signal Channel
Voltage Input
Modes

A only, -B only or Differential (A-B)
Full-scale Sensitivity 2 nV to 1 V in a 1-2-5 sequence
Max. Dynamic Reserve > 100 dB
Impedance
FET Input
Bipolar Input

10 MΩ // 30 pF
10 kΩ // 30 pF
Maximum Safe Input 20 V pk-pk
Voltage Noise
FET Input
Bipolar Input

5 nV/√Hz @ 1 kHz
2 nV/√Hz @ 1 khZ
C.M.R.R. > 100 dB @ 1 kHz
Frequency Response 0.001 Hz to 250 kHz
Gain Accuracy ±0.2% typ
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 or Wide Bandwidth
Full-scale Sensitivity
Low Noise
Wide Bandwidth

2fA to 10 nA in a 1-2-5 sequence
2 fA to 1 µA in a 1-2-5 sequence
Max. Dynamic Reserve > 100 dB
Frequency Response (-3 dB)
Low Noise
Wide Bandwidth
> 500 Hz
≥ 50 kHz
Impedance
Low Noise
Wide Bandwidth

< 2.5 kΩ ! 100 Hz
<250 Ω @ 1 kHz
Noise
Low Noise
Wide Bandwidth

13 fA/√Hz @ 500 Hz
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 (rear panel)
Frequency Range

0.001 Hz to 250 kHz
Analog Input (front panel)
Impedance
Sinusoidal input
Level
Frequency Range
Squarewave input
Level
Frequency Range

1 MΩ // 30 pF

1.0 V rms*
0.3 Hz to 250 kHz

250 mV rms*
2 Hz to 250 kHz
*Note: Lower levels can be used with the analog input at the expense of increased phase errors
Phase Set Resolution 0.001º increments
Phase Noise at 100 ms TC, 12 dB/octave slope
Internal Reference
External Reference


< 0.001º rms
<0.01º rms @ 1 kHz
Orthogonality 90º ±0.001º
Acquistion 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 Zero Stability
Digital Outputs
Displays
Analog Outputs

No zero drift on all settings
No zero drift on all settings
< 5 ppm/ºC
Harmonic Rejection -90 dB
Output Filters
X, Y and R outputs only
Time Constant

Slope (roll-off)
All outputs
Time Constant
Slope


10 µs to 640 µs in a binary sequence

6 dB/octave

5 ms to 100 ks in a 1-2-5 sequence
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 ≤0.01º
Oscillator
Frequency
Range
Setting Resolution
1 mHz ≤ F ≤ 900 Hz
F . 900 Hz
Absolute Accuracy

0.001 Hz to 250 kHz

1 mHz
4 mHz
± 50 ppm
Distortion (THD) -80 dB @ 1 kHz and 100 mV rms
Amplitude (rms)
Range
1µV to 4 mV
4 mV to 500 mV
500 mV to 2 V
2 V to 5 V
Accuracy
> 1 mV
100 µV - 1 mV
Stability

1 µV to 5 V rms
1µV
125 µV
500 µV
1.25 mV

±0.3%, F ≤ 60 kHz, ±0.5%, F > 60 kHz
±1%,F ≤ 60 kHz, ±3%, F > 60 kHz
50 ppm/ºC
Output Impedance
Sweep
Amplitude Sweep
Output Range
Law
Step Rate


0.001 to 5.000 V rms
Linear
20 Hz maximum (50 ms/step)
Frequency Sweep
Output Range
Law
Step Rate

0.001 Hz to 250 kHz
Linear or Logarithmic
20 Hz maximum (50 ms/step)
Auxiliary Inputs
ADC 1 & 2
Maximum input
Resolution
Accuracy
Input Impedance
Smple Rate
ADC 1 only
ADC 1 and 2
Trigger Mode
Trigger Input

±10 V
1 mV
±20 mV
1 MΩ // 30 pF

40 kHz max.
17.8 kHz max.
Internal, External or burst
TTL compatible
ADC 3
Maximum input
Resolution
Input Impedance
Sampling Time

±10 V
12 to 20 bit, depending on sampling time
1 MΩ // 30 pF
10 ms to 2 s, variable
Outputs
Fast Outputs
Function
Amplitude


Impedance
Update Rate

X and Y or X and Mag
±2.5 V full-scale; linear to ±300% full-scale


1 kΩ
166 kHz
Main Analog (CH1 and CH2) Outputs
Function

Amplitude



Impedance
Update Rate

X, Y, R, ø, Noise, Ratio, Log Ratio and User Equations 1 & 2.
±10.0 V full-scale; linear to ±120% full-scale



1 kΩ
200 Hz
Signal Monitor
Amplitude
Impedance

±10 V FS
1 kΩ
Auxiliary D/A Outputs 1, 2, 3 and 4
Maximum Output
Resolution
Accuracy
Output Impedance

±10 V
1 mV
±10 mV
1 kΩ
8-bit Digital Output Port
8 TTL-compatible lines that can be independently
set high or low to activate exteranl equipment
Reference Output
Waveform
Impedance

0 to 5 V rectangluar wave
TTL-campatible
Power - Low Voltage ±15 V at 100 mA rear panel 5-pin 180º DIN connector for powering SIGNAL RECOVERY preamplifiers
Data Storage Buffer
Size

Max Storage Rate

From LIA
From ADC1

32k x 16-bit data points, may be organized as 1x32k, 2x16k, 3x10.6k, 4x8k, etc.



up to 1000 16-bit values per second
up to 40,000 16-bit values per second
User Settings
Up to 8 complete instrument settings can
be saved or recalled from non-volatile
memory
Interfaces
RS232 and GPIB (IEEE-488). A second
RS232 port is provided to allow "daisy-
chain" connection and control of up to 16
compatible instruments from a single
RS232 computer port
General
Power Requirements
Voltage
Frequency
Power


110/120/220/240 VAC
50/60 Hz
40 VA max
Dimensions
Width
Depth
Height
With feet
Without feet

13¼" (350 mm)
16½" (415 mm)

4¼" (105 mm)
3½" (90 mm)
Weight 18 lb (8.1 kg)