MiniSonic MS20 Specifications

General Information

  • Size: 215 x 160 x 33 mm. Weight 600g.

  • Display: 128 x 64 pixel OLED graphic display with 180° viewing angle. Brightness and power-off time configuration options are provided.

  • Microphone: Dual low-noise microphone inputs (two 3.5mm mini-jacks) with 5V power, calibrated to UniSon standard (-30dBu=100dBSPL). Precision calibrated miniature measuring microphones (1/4") available at extra cost – see www.lindos.co.uk/microphones.

  • UniSon: Input and output sockets carry power (6 to 9V 1A max).

  • Headphone socket: 3.5mm stereo mini-jack for headphones 32ohm or greater. Automatic muting of internal speaker for stereo listening.

  • Power: Slot-in Sony NP500/530/560 style rechargeable lithium-ion battery included (15hrs use) or external 12V (11-14V) DC from 500mA mains adapter via 2.1mm power jack. Battery charges internally in 15hrs (half charged in 4hrs) with power connected.

  • Monitor loudspeaker: Built-in 65mm speaker and volume control for listening – monitors L-chan on all measurements.

  • Accessories included: Manual, UniSon to XLR and UniSon to phono input and output adapter leads (1m), mains lead, RS232 lead, 12V 1A mains PSU, lithium-ion battery and Lin4WinXP Windows 95/98/NT/2000/XP support software on CD.

  • Optional extras: UniSon to 3.5mm mini-jack leads, MM1/2/3 calibrated microphone, test CD and test tape available to order.


    • Analyser Specification:

  • Inputs Two-channel 44kohm balanced or 22kohm unbalanced on UniSon D-type socket (with 6-9v 'PowerBus' for microphone preamps etc).

  • Level measurement Two-channel simultaneous level measurement: -50dBu to +19dBu in 10dB ranges (autoranging/manual). Accuracy ±0.05dB -20dBu to +19dBu. Quasipeak reading as standard with fast option. Frequency readout to over 50kHz with high precision (±1Hz resolution). ±180° 20Hz – 20kHz phase readout with ±2° resolution and accuracy (up to 40kHz with reduced accuracy).

  • Normalise Press and hold to normalise to any level in the range +19dB to -50dB. Toggle normalised or absolute.

  • PPM mode Bright, two-channel simultaneous display with PPM dynamics to IEC268 type II (BBC) standard. This mode also allows for -60 to +30dB precision variable gain on the loop-through output, with very low noise (-85dB weighted) and distortion (-90dBu) for studio use.

  • Noise measurement ITU-R 468 weighting and quasi-peak dynamics. Residual input noise -88dBu weighted.

  • Distortion residue Instantly normalises and then nulls the fundamental and measures the residue on a 1kHz tone weighted according to IEC268 (ITU-R 468 curve and quasi-peak detector). Fully autoranging display relative to normalised level. Typical null depth -76dBu.

  • Crosstalk measurement Measures weighted crosstalk, automatically muting the channel selected, while driving the other at the selected frequency and level.

  • Sequence mode Receives over 30 Lindos test segments. Displays the results of all sequence segments on the OLED screen with up-down cursor on all graphs. Stores four complete sets of results for later transferring to a PC.

    • Oscillator Specification:

  • Outputs Two-channel (10ohm source impedance) balanced centre-grounded UniSon on 9-pin D-type plug. Unbalanced with phono or mini-jack leads.

  • Frequency range 4Hz to 40kHz sine in third and twelfth-octave steps, 1kHz 5kHz 10kHz square waves.

  • Frequency accuracy ±0.05% of specified synthesised frequency.

  • Flatness ±0.02dB typical from 20Hz to 20kHz, -0.05dB at 31kHz, -0.6dB at 16Hz and 40kHz.

  • Level range -90dBu to +19dBu in 0.5dB steps, balanced, centre-grounded; -96dBu to +13dBu single-ended. Accuracy of ±0.02dB is typical at 0dB; ±0.05dB is typical at -60dBu and +19dBu.

  • Distortion -76dB distortion residue (weighted) (-86dB/0.005% THD) at 1kHz (22Hz-22kHz bandwidth) typical. Minimum load 600O (-72dB THD).

  • Mute Mute, restore, and channel selection. Auto-mute on selecting noise measurement. Auto-signal source selection on crosstalk and distortion. Residual noise when muted: -86dBu weighted.

  • Sequences 19 pre-defined sequences and over 30 selectable test segments for user assembly including sweeps 20-20k and 40-40k, noise, crosstalk, distortion residue, noise vs time plot, headroom plot and phase plot.

  • Line-up segments Special segments for repetitive GLITS and channel ident tests. Also PPM and ITU-R 468 inverse-weighted tone-burst tests.

  • Presets 4 level and 4 frequency presets (user programmable).


    • Tel: +44 (0) 1394 380307, Fax: +44 (0) 1394 385156, Email:
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