Atec Stanford-Research-Systems-SR785 - Manual (Page 7)

Min. tach pulse width 100 ns
Max. tach pulse rate 750 kHz
Transient Capture
Mode Continuous data recording
Maximum rate 262,144 samples/s for both inputs
Maximum capture 2 Msamples (single input)
length 8 Msamples with optional memory
Octave Analysis
Standards Conforms to ANSI std. S1.11-1986
Order 3 Type 1-D and IEC 225-1966
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 L
eq
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-pole/20-zero 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, swept-sine, two-tone)
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 Hi-Z load
Harmonics, sub-harm. 0.1 Vp to 5 Vp
& 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 Hi-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.), 5000 rms
averages (<1.0 dBpp (max.))
Pink Noise Source
Bandwidth DC to 102.4 kHz
Flatness <2.0 dBpp, 20 Hz to 20 kHz (meas-
ured using averaged 1/3 oct. analysis)
Chirp Source
Time record Continuous or Burst
Output Sine sweep across the FFT span
Flatness ±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 res.
Interfaces IEEE-488.2, RS-232 and printer
interfaces (standard). All instrument
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
disk file. Additional file formats
include GIF, PCX and EPS.
Disk 3.5" DOS format, 1.44 Mbytes
Preamp power Power connector for SRS preamps
Power 70 W, 100/120/220/240 VAC,
50/60 Hz
Dimensions 17" Ч 8.25" Ч 24" (WHD)
Weight 56 lbs.
Warranty One year parts and labor on defects
in materials and workmanship
SR785 Specifications
Stanford Research Systems phone: (408)744-9040
www.thinkSRS.com