Transient Capture

Mode

Continuous real-time data recording to

 

memory.

Maximum Rate

262,144 samples/sec for both inputs

Max. Capture Length

2

Msamples (single input)

 

8

Msamples with optional memory

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 - 32 kHz

 

1/3 Octaves

0.100

Hz - 40 kHz

 

1/12 Octaves

0.091

Hz - 12.34 kHz

 

Two Channels

 

 

 

1/1 Octave

0.125

Hz - 16 kHz

 

1/3 Octaves

0.100

Hz - 20 kHz

 

1/12 Octaves

0.091

Hz - 6.17 kHz

Accuracy

<0.2 dB (one second stable average,

 

single tone at band center)

Dynamic Range

80 dB (1/3 octave, two second stable

 

average) per ANSI S1.11-1986

Sound Level

Impulse, Peak, Fast, Slow and Leq per

 

IEC 651-1979 Type 0

Order Tracking

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-pole/20-zero non-iterative rational

 

fraction fit.

Output Format

Pole-zero, polynomial, or pole-residue

Source Output

Amplitude Range

0.1 mVpk to 5 Vpk

Amplitude Resolution

0.1 mVpk

Offset Adjust

±5 V

Output Impedance

<5 , ±100 mA peak output current

Sine-Source

Amplitude Accuracy

±1% of setting, 0 Hz to 102.4 kHz

 

0.1 Vpk to 5.0 Vpk, high impedance

 

load

Harmonics, SubHarm.

0.1 Vpk to 5 Vpk

and 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 Vpk to 5 Vpk, high Z load

Harmonics, SubHarm.

<-80 dBc, 0.1 Vpk to 2.5 Vpk

White Noise Source

Time Record

Continuous or Burst

Bandwidth

DC to 102.4 kHz or limited to span

Flatness

<0.25 dB pk-pk (typical),

 

<1.0 dB pk-pk (max), 5000 rms

 

averages

Pink Noise Source

Bandwidth

DC to 102.4 kHz

Flatness

<2.0 dB pk-pk, 20 Hz - 20 kHz

 

(measured using averaged 1/3 octave

 

analysis)

Chirp Source

Time Record

Continuous or Burst

Output

Sine sweep across the FFT span

Flatness

±0.25 dB, 1.0 Vpk

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

Monitor

Monochrome CRT, 800H by 600V

 

resolution, 8.2 inch diagonal display

Interfaces

IEEE-488, RS-232 and Printer

 

interfaces standard.

 

All instrument functions can be

 

controlled through the IEEE–488 and

 

RS-232 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 interfaces or to

 

disk file. Additional file formats

 

include GIF, PCX and EPS.

Disk

3.5" DOS compatible format, 1.44

 

Mbytes capacity. Storage of displays,

 

setups and hardcopy data.

Preamp Power

Power connector for SRS

 

preamplifiers.

Power

70 Watts, 100/120/220/240 VAC,

 

50/60 Hz

Dimensions

17"W x 8.25"H x 24"D

Weight

56 lbs.

Warranty

One year parts and labor on materials

 

and workmanship.

Page 12
Image 12
SRS Labs SR785 manual Transient Capture, Source Output, Sine-Source, Two Tone Source, White Noise Source, Pink Noise Source

SR785 specifications

The SRS Labs SR785 is a powerful and versatile audio analysis tool designed for audio engineers, researchers, and manufacturers. This instrument is renowned for its ability to perform a wide array of measurements, making it an essential asset for anyone involved in audio testing and development. With its cutting-edge features and technologies, the SR785 stands out in the competitive field of audio analysis.

One of the main features of the SR785 is its dual-channel capability, which allows users to analyze both input and output signals simultaneously. This is particularly useful for applications such as loudspeaker testing, where comparing the input signal against the output can provide valuable insights into the performance and fidelity of audio systems. The device supports a wide dynamic range and can capture audio signals from an impressive range of frequencies, ensuring accurate representations of even the most nuanced sounds.

The SR785 employs state-of-the-art Fast Fourier Transform (FFT) technology, enabling users to switch between time-domain and frequency-domain analysis with ease. This flexibility allows engineers to tailor their measurements based on specific requirements, whether they are evaluating distortion levels, frequency response, or impulse response. The instrument’s high-resolution display provides clear visual representations of the analyzed data, making it easier to identify trends and anomalies.

Another notable feature of the SR785 is its built-in automation capabilities. This technology allows for automated testing sequences, streamlining the analysis process and reducing the potential for human error. Users can pre-program a series of tests to run automatically, ensuring consistency in measurements and saving valuable time during testing and analysis.

Additionally, the SR785 offers extensive data storage options, allowing users to save measurement results for future reference or comparison. This is particularly beneficial for long-term studies or for manufacturers conducting quality control checks on production lines. The device is also equipped with a range of connectivity options, including USB and GPIB, facilitating easy integration into existing test setups and enhancing its versatility.

The combination of advanced features, robust technologies, and user-friendly design makes the SRS Labs SR785 a top choice for audio professionals seeking a reliable and efficient audio analysis solution. Whether for research, development, or quality assurance, the SR785 delivers precise and actionable insights that drive sound performance to new heights.