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SR785:SR785
Product:Benchtop Spectrum Analyzer
Resolution Bandwidth Range:DC to 102.4 kHz
Analyzer Type:Spectrum Analyzers
MPN:SR785
Unit Type:Complete Systems & Mainframes
Stanford Research:Stanford Research
Frequency Range:102.4 kHz
Stanford Research SR785 FFT Dual-Channel Dynamic Spectrum Signal Analyzer Comes with a manual and what you see in the pictures. If you don’t see it, you probably wont get it. Specifications are from Stanford Research and may vary slightly due to upgrades, options, or revisions this unit may or may not have. This unit is sold fully tested and guaranteed to work for 30-days, parts and labor, excluding freight. The Unit’s Serial Number Tag Reads: Serial Number: 46619 Features: DC to 102.4 kHz bandwidth 90 dB dynamic range 145 dB dynamic range (swept-sine) Order tracking 20-pole/20-zero curve fitting Real-time octave analysis Up to 32 Mbyte memory GPIB and RS-232 interfaces Description: The SR785 Two-Channel Dynamic Signal Analyzer is a precision, full-featured signal analyzer that offers state-of-the-art performance at a price that’s less than half that of competitive analyzers. Building on its predecessor, the SR780, the SR785 incorporates new firmware and hardware that make it the ideal instrument for analyzing both mechanical and electrical systems. Specifications: Measurement Groups: Groups: FFT, Correlation, Time Histrogram, Swept-Sine, Order Tracking Frequency: Range: 102.4 kHz or 100 kHz (both displays have the same range) FFT Spans: 195.3 mHz to 102.4 kHz or 191 mHz to 100 kHz. The two displays can have different spans and start frequencies. FFT Resolution: 100, 200, 400 or 800 lines Real-Time Bandwidth: 102.4 kHz (highest FFT span with continuous data acquisition and averaging) Accuracy: 25 ppm from 20°C to 40°C Dynamic Range: Dynamic Range: 90 dB typical, 80 dB guaranteed (FFT and Octave). 145 dB typical (Swept-Sine). Includes spurs, harmonics, intermodulation distortion, and alias products. Excludes alias responses at extremes of span. Harmonic Distortion: < -80 dB (single tone in band) Intermod. Distortion: < -80 dB (two tones in band, each less than -6.02 dBfs) Spurious: < -80 dBfs Alias Response: < -80 dBfs (single tone outside of span, < 0 dBfs, less than 1 MHz) Full Span FFT Noise Floor: -100 dBfs typical (input grounded, > -30 dBV, Hanning window, 64 rms averages) Residual DC Response: < -30 dBfs (FFT with Auto-Cal on) Amplitude Accuracy: Single Channel: ±0.2 dB (excluding window effects) Cross Channel: ±0.05 dB, DC to 102.4 kHz (frequency response measurement, both inputs on the same range, rms averaged) Phase Accuracy: Single Channel: ±3.0 deg. relative to external TTL trigger (-50 dBfs to 0 dBfs, freq < 102.4 kHz, center of frequency bin, DC coupled). For Blackman-Harris, Hanning, Flat-Top and Kaiser windows, phase is relative to a cosine wave at center of time record. For Uniform, Force and Exponential windows, phase is relative to a cosine wave at beginning of the time record. Cross Channel: ±0.5 deg. (DC to 51.2 kHz), ±1.0 deg. (DC to 102.4 kHz) - (frequency response measurement, both inputs on same range, vector averaged) Signal Inputs: Number of Inputs: 2 Full-Scale Input Range: -50 dBV (3.16 mVp) to +34 dBV (50 Vp) in 2 dB steps Maximum Input Level: 57 Vp Input Configuration: Single-ended (A) or differential (A-B) Input Impedance: 1 MΩ +50 pF Shield to Chassis: Floating Mode: 1 MΩ + 0.01 µF Grounded Mode: 50 Ω (shields grounded in (A-B) mode) Max. Shield Voltage: 4 Vp AC Coupling: 0.16 Hz cutoff frequency CMRR: 90 dB at 1 kHz (input range < 0 dBV), 80 dB at 1 kHz (input range < 10 dBV), 50 dB at 1 kHz (input range > or = to 10 dBV) ICP Signal Conditioning: Current Source: 4.8 mA Open Circuit Voltage: +26 V A-weight Filter: Type 0 tolerance, ANSI standard S1.4-1983; 10 Hz to 25.6 kHz Crosstalk: < -145 dB below signal (input to input and source to inputs, 50 Ω receiving input source impedance) Input Noise: < 10 nVrms/√Hz above 200 Hz (< -160 dBVrms/√Hz) Trigger Input: Modes: Free Run, Internal, External, or External TTL Internal: Level adjustable to ±100% of input scale, positive or negative slope. Min. trigger level: 5% of input range External: Level adjustable to ±5 V in 40 mV steps, positive or negative slope. Input Impedance: 1 MΩ Max. Input: ±5 V Min. Trigger Amplitude: 100 mV External TTL: Requires TTL level to trigger (low < 0.7 V, high > 3.0 V) Post-Trigger: Measurement record is delayed up to 100,000 samples after the trigger. Pre-Trigger: Measurement record starts up to 8000 samples prior to the trigger. Tachometer Input: Pulses per Revolution: 1 to 2048 RPM Accuracy: ±50 ppm (typ.) Tach Level Range: ±25 V, ±5 V, TTL Tach Level Resolution: 20 mV @ ±25 V, 4 mV @ ±5 V Max. Tach Input Level: ±40 Vp Min. Tach Pulse Width: 100 ns Max. Tach Pulse Rate: 750 kHz (typ.) Transient Capture: Mode: Continuous data recording Maximum Rate: 262,144 samples/s for both inputs Maximum Capture Length: 2 Msamples (single input) Octave Analysis: Standards: Conforms to ANSI standard S1.11-1986, Order 3, Type 1-D Frequency Range (Band Centers): Single Channel: 1/1 Octave: 0.125 Hz to 32 kHz 1/3 Octave: 0.100 Hz to 40 kHz 1/12 Octave: 0.091 Hz to 12.3 kHz Two Channels: 1/1 Octave: 0.125 Hz to 16 kHz 1/3 Octave: 0.100 Hz to 20 kHz 1/12 Octave: 0.091 Hz to 6.17 kHz Accuracy: < 0.2 dB (1 second stable average, single tone at band center) Dynamic Range: 80 dB (1/3 Octave, 2 second stable average) per ANSI S1.11-1986 Sound Level: Impulse, Peak, Fast, Slow and Leq per ANSI S1.4-1983 Type 0 and IEC 651-1979 Type 0 Order Tracking: Delta Order: 0.0075 to 1 Resolution: Up to 400 lines Amplitude Accuracy: ±1 dB (typ.) Displays: Order map (mag. and phase), order track (mag. and phase), orbit Curve Fit and Synthesis: Type: 20 poles/20 zeros curve fit (non-iterative rational fraction) Order Selection: Auto or manual Output Format: Pole-zero, polynomial, pole-residue Source Output: Amplitude Range: 0.1 mVp to 5 Vp Amplitude Resolution: 0.1 mVp DC Offset: < 10.0 mV (typ.) Offset Adjust: ±5 VDC (sine, two-tone, swept-sine) Output Impedance: < 5 Ω, ±100 mA peak output current Sine Source: Amplitude Accuracy: ±1% of setting, 0 Hz to 102.4 kHz, 0.1 Vp to 5 Vp into High-Z load Harmonics, Sub-Harm. & Spurious Signals: < -80 dBc (fundamental < 30 kHz), < -75 dBc (fundamental < 102 kHz) Two-Tone Source: Amplitude Accuracy: ±1% of setting, 0 Hz to 102.4 kHz, 0.1 Vp to 5 Vp into High-Z load Harmonics, Sub-Harm.: < -80 dBc, 0.1 Vp to 2.5 Vp White Noise Source: Time Record: Continuous or burst Bandwidth: DC to 102.4 kHz or limited to span Flatness: < 0.25 dBpp (typ.), 500 rms averages (< 1.0 dBpp (max.)) Pink Noise Source: Bandwidth: DC to 102.4 kHz Flatness: < 2.0 dBpp, 20 Hz to 20 kHz *measured using averaged 1/3 Octave Analysis) Chirp Source: Time Record: Continuous or Burst Output: Sine sweep across the FFT span Flatness: &pplusmn;0.25 dB (1.0 Vp) Swept-Sine Source: Auto Functions: Source Level, Input Range and Frequency Resolution Dynamic Range: 145 dB Arbitrary Source: Amplitude Range: ±5 V Record Length: 2 Msamples (playback from arbitrary waveform memory or capture buffer). Variable output sample rate. General: CRT Monitor: Monochrome, 800H by 600V resolution Interfaces: IEEE-488.2, RS-232 and Printer interfaces standard. All isntrument functions can be controlled through computer interfaces. A PC (XT) keyboard input is provided for additional flexibility. Hardcopy: Print to dot matrix and PCL compatible printers. Plot to HP-GL or postscript plotters. Print/plot to RS-232 or IEEE-488.2 interfaces or to disk file. Additional file formats include GIF, PCX and EPS. Data Storage: USB Drive (I am not sure this unit has this functionality, I think that is a newer revision) Preamp Power: Power connector for SRS preamps Power: 70 W, 100/120/220/240 VAC, 50/60 Hz Dimensions: 17" W x 8.25" H x 24" L Weight: 56 lbs. For Domestic Customers: Packaging, handling, and order processing included in shipping in all domestic shipments as quoted by the shipping calculator. For International Customers there is a $75.00 minimum for packaging, handling, and order processing. International shipping to be determined by destination. Prior to shipment I will need to know the following information (filled out on a form that I will send you) for International Customers or Packages/Freight being Forwarded internationally. International customers may also be subject to a freight forwarder form if applicable.: (1) Are you the end-user of this item? (2) If you are not the ultimate end-user of the item, please state the ultimate end user's name. (3) What is the ultimate country destination? 12/10/14
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