RDL RU-SM16D 4-Channel Audio Meter, Average, Peak, Hold

RDL’s RU-SM16D is the ideal choice in most situations where multiple audio level metering is to be designed into a new system or added to existing equipment. It has 4 separate inputs, and each may be individually calibrated for unbalanced consumer, balanced professional, 8 Ohm speaker line, or constant voltage speaker lines (25 V, 70 V, or 100 V) with all connections made using detachable terminal blocks. A rear-panel switch selects variable or fixed calibration for 25V, 70V, 100V, and +4 dBu sources. In the “variable” position, front-panel multi-turn trimmers adjust the calibrated meter levels. Rear-panel switches let the installer set each meter individually for either peak or average audio level display. In monaural installations, it may be advantageous to feed the mono source to 2 meters, setting one meter for peak and the other meters for average. In either mode, the upper 3 LEDs (+10, +14, +18) remain in the PEAK HOLD mode. In stereo applications, each left and right channel, can display both peak and average values. Each of theRU-SM16D’s 4 meters may be operated separately to monitor 4 different sources. The RU-SM16D uses bright LEDs for good visibility, and each input has a label area for easy identification of the metered source or function.

Recommended Power Supply (sold separately): PS-24AS

RDL RU-SM16D Features:

• Precision Audio Level Metering
• Digital 16 LED String Display Indication
• (4) Mono Meters or Dual Stereo Metering
• Line-Level, Speaker-Level or 25/70/100 V Audio Input
• Selectable Fixed or Variable Calibration
• Individual Channel Calibration Controls
• Selectable Peak or Average Metering
• Peak-Hold Display for +10, +14, +18 dB

RDL RU-SM16D Specifications:

• Inputs (4): Line level or Amplified speaker level
• Input Impedance: > 40 kO balanced or unbalanced
• 0 dB Calibration: Fixed or Variable (switch-selectable)
• Fixed Input Level:
  • +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)
  • *Constant-voltage or low-impedance (4 Ohms, 8 Ohms) amplifier output
• Variable Input Level Range:
  • -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)
  • *Constant-voltage or low-impedance (4 Ohms, 8 Ohms) amplifier output
• Metering Freq. Response: 20 Hz to 20 kHz
• Indicators: 16 LEDs per channel: SIG, -20, -15, -12, -9, -6, -3, -2, -1, 0, +1.5, +3, +6, +10, +14, +18 (+10, +14, +18 are PEAK HOLD indicators only)
• Metering Response:
  • Rise Time (10% to 90%):
    • Peak Mode: 50 us
    • Average Mode: 130 ms
  • Rise Time (0% to 100%):
    • Peak Mode: 60 us
    • Average Mode: 300 ms (VU Characteristic)
  • Fall Time (90% to 10%):
    • Peak Mode: 65 us
    • Average Mode: 185 ms (VU Characteristic)
  • Fall Time (100% to 0%):
    • Peak Mode: 100 us
    • Average Mode: 300 ms (VU Characteristic)
  • Ambient Operating Environment: 0° C to 55° C
  • Power Requirement: GROUND-REFERENCED, 24 Vdc @ 450 mA (Power supply #PS-24AS sold separately)
  • Package Dimensions: 6″ x 6″ x 2.625″
  • Shipping Weight: 1.325 lbs
  • WEEE weight: 1.09 lbs
  • Product Dimensions Illustration: