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The RDL RU-SM16D 4-Channel Audio Meter is a 1RU 1/3 rack module designed for precise metering of up to 4 channels of audio. The unit can be used for either 4 channels of mono metering or dual-stereo operation and is designed to be integrated into new and existing setups.
Each channel utilizes sixteen LED indicator lights and may be individually calibrated for unbalanced consumer, balanced professional, 8 Ω speaker line, or constant voltage speaker lines (25V, 70V, 100V). The rear panel features terminal blocks for connections and variable or fixed calibration for 25V, 70V, 100V, and +4 dBu sources. When placed in the "variable" position, a set of front panel multi-turn trimmers can be used for calibrating the meter levels.
Each meter on the unit can be set to either peak or average audio level displays. In monaural applications, a mono source can be fed to two meters for both peak and average metering. In stereo mode, both the left and right channels can be sent to one peak and one average metering channel.
In the Box
RDL RU-SM16D 4-Channel Audio Meter
Limited 3-Year Warranty
Table of Contents
> 40 kΩ balanced
+4 dBu (+4 switch settings, for 0 dB reading) 25 V (25 V switch settings, for 0 dB reading) 70 V (70 V switch settings, for 0 dB reading) 100 V (100 V switch settings, for 0 dB reading)
Input Level Range
Constant-voltage or low impedance (4 Ω or 8 Ω) amplifier output -24 dBu to +12 dBu (+4 switch settings for 0 dB reading 2 V to 90 V (25 V switch settings, for 0 dB reading) 4 V to 90 V (70 V switch settings, for 0 dB reading) 5 V to 100 V (100 V switch settings, for 0 dB reading)
Each channel individually selectable PEAK or AVG (switch-selectable) Rise time (10 to 90%): 50 us (peak), 130 ms (average) Rise time (0 to 100%): 60 us (peak), 300 ms (VU characteristic) Fall time (90 to 10%): 65 us (peak), 185 ms (average) Fall time (100 to 0%): 100 us (peak), 300 ms (VU characteristic)
Ambient Operating Temperature
32 to 131&Deg; F (0 to 55° C)
Ground-Referenced: 24 VDC at 250 mA
Dimensions (W x D x H)
5.740 x 2.970 x 1.640" (14.580 x 7.540 x 4.170 cm)