Qualis Audio Sentinel
| Analysis | |
| Surround Format | 5.1, 5.1+2, 6.1, 6.1+1, 7.1 |
| Metering Standards | VU, Nordic PPM, BBC PPM, EBU PPM, DIN PPM, proprietary 85 dB range meters, 12 updates/second |
| Peak Amplitude | True peak responding with 4x interpolation, 340 ms update rate |
| Downmix Compatibility | Computes energy lost during downmixing to both stereo and mono formats. Analysis performed in 1/30th octave resolution, displays L, R, M results in octave bands, 680 ms update rate |
| Channel Balance | Channel loudness relative to the loudest channel, 340 ms update rate |
| LFE Analysis | Measures LFE BW, LFE downmix loss |
| Channel Interchange | Detects front/surround reversal by level comparison, detects CF/LFE interchange by bandwidth comparison |
| Spectral Analysis | Measures program energy in octave bands, 680 ms update rate |
| Loudness analysis | |
| Measurements | Momentary, Short-Term, Integrated Loudness, Loudness Range |
| Standards | ATSC A/85; ITU-R BS.1770-2; EBU R-128, tech 3341, tech 3342 |
| Classification | Signal may be classified as program or commercial, allowing one meter to continuously monitor a broadcast stream |
| Segment Duration | 3.2 seconds minimum |
| Channel Allocation | 8 channels, allocated between surround and ancillary meters |
| Control | 2 hardware signals per loudness meter (surround and ancillary) |
| Channel analysis | |
| Channel Loss | Compares individual channel loudness to user specified threshold and duration |
| Excessive Level | Compares individual channel levels to user specified threshold and duration |
| Hum Detection | Detects stable 50/100/150 Hz or 60/120/180 Hz tones and harmonics |
| Digital analysis | |
| Interface | Measures sample rate. Detects loss of lock, parity errors. Detects cross-interface inconsistency |
| Data | Detects digital zero and digital clipping. Measures bit activity, active word length. Detects cross channel inconsistency |
| Metadata | Analyzes status bit metadata. Detects metadata inconsistency |
| Other analysis | |
| DC Inputs | Compare to independent min & max values |
| Temperature | Compare to min & max temperature |
| Analog input | |
| Connection | 8 channels on 25 pin female D-sub |
| Format | Balanced or Unbalanced |
| Input Impedance | 1 MΩ, each side to ground |
| Maximum Input | +28 dBu |
| CMRR | >50 dB, 20 Hz to 20 kHz, 10 Ω source imbalance |
| Response | ±0.1 dB, 20 Hz to 20 kHz |
| S/N | >105 dB, 20 Hz to 20 kHz |
| Crosstalk | >80 dB, 20 Hz to 20 kHz |
| Digital input/output | |
| Input Format | AES-3 120 Ω Balanced or 75 Ω Unbalanced |
| Output Format | AES-3 75 Ω Unbalanced |
| Word Width | 16 to 24 bit |
| Connector A | 4 AES-3 inputs (8 ch.), 1 AES-3 output on one 15 pin high density female D-sub |
| Sample Rate | 32 kHz to 192 kHz, each stream asynchronous to all others |
| Connector B | 1 AES-3 input selected from 4 AES-3 inputs on one 15 pin high density female D-sub |
| Sample Rate | 32 kHz to 48 kHz |
| Cable Compatibility | Unbalanced inputs use VGA to BNC cable, Balanced inputs use a custom DB15HD to 4 XLR / 1 BNC cable (available as an option) |
| Auxiliary signals | |
| Connection | 25 pin female D-sub |
| LTC Input | Balanced, AC coupled, 22 kΩ, each side to ground, 5Vpp max |
| Auxiliary Inputs | 6, 0 to 2.55VDC, unbalanced, 340 ms sampling interval |
| Control Inputs | 4, 2 per Loudness meter, 0.6V low, 2.7V high, 5V max input, 40 ms minimum width, 20 ms de-bounce after last transition |
| Alarm Outputs | 4, open-collector, 24V/100mA max |
| Miscellaneous | |
| Network | 10BASE-T Ethernet, RJ45 with status LEDs |
| Chassis | 1.75 H (1U) x 17 W x 7 D (8.9 cm x 54.2 cm x 17.8 cm) |
| Power | 24V at 0.5 A max from external adaptor |
| Power adaptor | 100V/120V/240V, 50/60 Hz, 15W |
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