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 Microphones and Recording |
| UniSon | Input and output sockets carry stereo balanced audio and power (6 to 9V 1A max). MS20 supplied with breakout cables to XLRs and phonos. |
| Headphone socket | 3.5mm stereo mini-jack for headphones 32Ω 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 (included) 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 left channel on all measurements. |
| Accessories included | Manual, UniSon to XLR and UniSon to phono input and output adapter leads (1m), mains lead, RS232 lead, Windows 11 compatible USB to serial convertor, 12V 1A mains PSU, lithium-ion battery and Lin4Win (running under all versions of Windows) support software supplied on USB memory stick. |
Analyser Specification
| Inputs | Two-channel 44kΩ balanced or 22kΩ 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 (auto-ranging/manual). Accuracy ±0.05dB -20dBu to +19dBu. Quasi-peak reading as standard with fast option. |
| Frequency Measurement | Frequency readout to over 50kHz with high precision (±1Hz resolution). |
| Phase Measurement | ±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 (-84dBu ITU-R 468 weighted) and distortion (-76dBu Distortion Residue) for studio use. |
| Noise measurement | ITU-R 468 weighting and quasi-peak dynamics. Residual input noise -88dBu weighted. |
| Distortion Residue Measurement | 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 auto-ranging 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 up to four complete sets of results for later transferring to a PC. |
Oscillator Specification
| Outputs | Two-channel (10Ω source impedance) balanced centre-grounded UniSon on 9-pin D-type plug. Unbalanced with phono or mini-jack leads. Gain output for studio use provided on second 9-pin D-type plug. 10Ω source impedance, balanced centre-grounded. 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. |
| Level Accuracy | ±0.02dB at 0dB; ±0.05dB at -60dBu and +19dBu. |
| Distortion | -76dB distortion residue (weighted) (-86dB/0.005% THD) at 1kHz (22Hz-22kHz bandwidth) typical. |
| Minimum Load | 600Ω (-72dB THD). |
| Mute, restore, and channel selection | Auto-mute on selecting noise measurement. Auto-signal source selection on crosstalk and distortion. Residual noise when muted: -86dBu ITU-R 468 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). |