Lindos Analyser LA100 Specifications
LA101 Audio Oscillator
Frequency range | 5Hz to 38kHz, 3 steps (coarse) and 32 steps (fine) per octave. |
Frequency accuracy | Correct to 0.02% (200 ppm). |
Frequency stability | ±30ppm |
Frequency resolution | 32 spot frequencies synthesised over one octave, repeating, multiplied by 2,4,8 etc. |
Level accuracy | ±0.03dB +26 to -60dBu, ±0.2 60 to 80dBu. Laser-trimmed resistors and software error corrections stored in EPROM. |
Impedance accuracy | ±2% or ±2 Ω (whichever is the greater). |
Amplitude range | 100 to +26dBu in 1dB or 0.01dB steps. |
Amplitude flatness | ±0.05dB, 5Hz – 31.5kHz. |
Waveforms | Sine, square, triangular, sawtooth (positive and negative going), DC+ and DC-. A double tone with 70Hz separation is also available at 1kHz. |
Tone bursts | programmable frequency, level and duration (27 minutes max. 100µs resolution). A series of tones or tone bursts can be easily programmed, and can be made to repeat. Start on zero crossing. |
Distortion (THD+N) | <-86dB (0.005%) 1kHz; <-86dB 400Hz, <-80dB (0.01%) 100Hz; <-76dB (0.016%) 6.3kHz; (all rms, 2f – 22kHz bandwidth). Combined LA101/102 measurement. |
Output selection | L/R/L+R or Mute. Muted channel is automatically terminated with selected impedance. |
Output impedance | 10 &ohm at rear XLRs. 75 &ohm or 600 &ohm selectable on front jack sockets. Balanced and floating, separate resistors. Other output impedances available to special order. |
Minimum load | 600 &ohm at +20dBu one channel, or +18dB both channels loaded. |
Weighting curves | RIAA; ITU-R 468 468; O41; 50µs de-emphasis; plus 5 user programmable weighting curves. |
Sequences | Over 60 predefined test sequences and 10 user programmable sequences. |
Segments | 47 selectable test segments for user assembly. |
FSK | Frequency Shift Keyed data transmitted over signal path, 110 baud. |
Presets | 5 frequency and 5 level presets (user programmable) |
Relative levels | Any level can be set as a 0dB reference. |
Z-correction | Automatic level corrections for 600 &ohm loading selectable. |
LA102 Audio Measuring Set
Inputs | 10k&ohm and 600&ohm selectable. Differential inputs, with L/R selection. |
Overload protection | 100V rms, diode limited. |
Level measurement | -95 to +28dBu in 10dB ranges (autoranging/manual). |
Default | RMS 2Hz-100kHz -3dB, 20Hz-40kHz -0.2dB. |
Options 2-5 | RMS 22Hz-22kHz, VU 22Hz-22kHz, RMS A Wtd, PPM, VU A Wtd. |
High pass filter | 400Hz with12dB/octave selectable. |
Audio band filter | selectable with 22Hz 12dB/octave, 22kHz 36dB/octave. |
Level resolution | Numeric: 0.01dB steps. Bar graph: 0.2dB/pixel (default) 0.04dB/pixel (zoomed). |
Level accuracy | ±0.05dB +28 to -60dBu, ±0.2dB -60 to -80dBu |
Frequency | Reciprocal counting 20Hz-20kHz, 4-5 digit readout |
Phase | ±180º, 20Hz to 20kHz with ±2º accuracy (up to 40kHz with reduced resolution). |
Noise measurement | -105 to +8dBu in 10dB ranges. |
Default | ITU-R 468 weighted quasi-peak. |
Options 2,3,6,7 | ITU-R 468 unweighted, RMS 22-22k, ITU-R 468/ARM, ITU-R 468 RMS. |
Residual Noise | -97dBu ITU-R 468 wtd., -107dBu RMS 22kHz. |
Rumble measurement | Weighted slow (IEC98) (on noise option 5). Unweighted slow (IEC98) (on noise option 4). |
Crosstalk | -117 to +8dBu, narrow band measurement, automatic freq. selection. Measured with a two stage 12dB/oct bandpass filter. -1dB at 20% frequency error, -10dB at one octave. |
Options1-6 | 100Hz, 315Hz, 1kHz, 6.3kHz, 10kHz, 40Hz. 400Hz instead of 315Hz available to order. |
Options 7-9 | 80Hz-400Hz, 1.8kHz-21kHz and 12-21kHz bandpass. |
Residual Noise | -117dBu at 1kHz, -111dBu at 6.3kHz typical. |
Distortion | THD+Noise, relative, with automatic fundamental measurement and filter frequency selection. Measured with a combined multi-stage notch and high-pass filter. Frequency tolerance is ±1% for 70dB rejection. No nulling required and the broad notch rejects flutter sidebands effectively. (-60dB @ +2%) |
Options 1-6 | 100Hz, 315Hz (3rd harmonic), 1kHz, 6.3kHz, 10kHz, 40Hz. |
Input Level Range | -60dBu to +28dBu, noise limits readings below 0dBu. |
Residual reading | Combined specification as for LA101 above. |
Response | 0.5dB at 2nd harmonic, 22kHz 36dB/octave band-limited. |
Wow & flutter | -80dB to -20dB (0.01% to 10%). |
Default | weighted quasi-peak to IEC386, DIN45507. |
Options 2,6,7 | Unweighted quasi-peak, weighted RMS, Unweighted RMS. |
Quantising distortion | 40Hz notch, 400Hz HP, Wtd ITU-R 468 & Unwtd rms. |
Difference frequency dist. | 70Hz bandpass filter for 2nd order difference frequency distortion measurement on double tone with 70Hz separation (1kHz-20kHz). |
FIM (Frequency Intermod.) | To DIN45411 (3KHz/300Hz) to -60dB, 0.1% |
Sequences | Responds automatically to all LA101 sequences. |
FSK speed tolerance | ±4% speed error allowed. |
Monitor loudspeaker | With volume setting and listen switch. |
Scope/headphones output | BNC 1V RMS output mid-scale and 0/+5V BNC sync. pulse. |
22Hz-22kHz filter | Elliptic design with 60dB rejection at 44kHz. This permits valid distortion measurement on digital equipment despite sampling residue. |
Sequence results | Sweeps produce a graph on the display with cursor readout, automatic scrolling and scaling facilities. Sequences produce a graph plus several pages of data with quick access. |
Printout | Sequence results can be printed directly on an Epson ESC/P, IBM or HP Deskjet compatible printer fitted with serial interface. Printout includes high resolution frequency response graphs. |
Sequence results memories | 5 sequence memories allow later printout or analysis. |
Tolerance testing | 5 user programmable tolerances in addition to 10 pre-programmed tolerances (Selftest, IBA, EPS81, EPS84, EPS98, Studer A812 etc) |
Test tape mode | LA102 can automatically measure frequency response, W&F and speed from a test tape, ignoring voice announcements and plotting an interpolated graph between the spot frequencies it finds. External frequency sweeps can also be used. |
Common to Both Units
Standards | All measurements meet quoted standards regarding weighting curves, accuracy, and meter ballistics. |
Remote control | The RS232 compatible serial interface provides complete control of measurements and access to results using a comprehensive set of ASCII commands. 5 pin domino DIN sockets. |
Serial interface | Inputs: Opto-isolated, +2V threshold. Outputs ±5V. Compatible with most RS232 and RS423 equipment. 8 data bits, 1 start bit, 1 stop bit, no parity. |
Baud rate | 75, 110, 150, 300 (default), 1200, 2400, 4800 and 9600 (19200 baud also available on LA102 output only). Split baud rates supported. |
Size | 216mm(W) × 88mm(H) × 258mm(D). Weight: 3kg (LA101 or LA102).Display 71mm × 27mm. |
Power requirement | Mains 220-250V, 50-60Hz, 9VA, (110V option). |
Battery life | Automatic mains recharge in 36 hours. |
Safety | IEC1010 |
Temperature range | 10-40ºC operating, 10-30ºC for full distortion specification. |
Connectors | PO 1/4" Jack (B gauge, small tip) & XLR-3 at rear. |
Guarantee | 2 years. Fast repair/software recalibration service available. |
Technical support | Lifetime technical support from Lindos via telephone, mail or e-mail |
EMC compliance | Complies with the EMC directive (EN50081 & EN50082) when used with connecting leads as prescribed in the LA100 handbook. |
Traceability | Calibration either traceable to British National Standards or derived by approved ratio techniques. |
Calibration Interval | 2 years recommended. |
Support Software | Lin4win running under all version of Windows including Windows 10 and 11. Connecting leads to a 9w D type serial port are included. |