| { "System Specifications" : { "RF Carrier Range" : "470 937.5 MHz, varies by region", "Working Range" : "328 ft (100 m)", "RF Tuning Step Size" : "25 kHz, varies by region", "Image Rejection" : ">70 dB, typical", "RF Sensitivity" : "-97 dBm at 10^-5 BER", "Audio Frequency Response" : "Dependent on microphone type", "Audio Dynamic Range" : "> 120 dB, A-weighted, typical", "Total Harmonic Distortion (-12 dBFS input, System Gain @ +10)" : "< 0.1%", "System Audio Polarity" : "Positive pressure on microphone diaphragm produces positive voltage on pin 2 (with respect to pin 3 of XLR output) and the tip of the 1/4" (6.35 mm) output", "Operating Temperature Range" : { "Note" : "Battery characteristics may limit this range" }, "Storage Temperature Range" : "-20°F to 165°F (-29°C to 74°C)", "Note" : "Battery characteristics may limit this range" }, "QLXD4 Receiver" : { "RF Input" : { "Spurious Rejection" : "> 80 dB, typical", "Connector Type" : "BNC", "Impedance" : "50 Ohms" }, "Audio Output" : { "Gain Ajdustment Range" : "-18 dB to +42 dB in 1 dB steps", "Configuration" : { "1/4" (6.35 mm)" : "Impedance balanced (tip=audio, ring=no audio, sleeve=ground)", "XLR" : "Balanced (1=ground, 2=audio +, 3=audio -)" }, "Impedance" : { "1/4"" : "+12 dBV", "XLR" : { "Line Setting" : "+18 dBV", "Mic Setting" : "-12 dBV" } }, "Mic/Line Switch" : "30 dB pad", "Phantom Power Protection" : { "1/4"" : "Yes", "XLR" : "Yes" } }, "Networking" : { "Network Interface" : "Single port Ethernet 10/100 Mbps", "Network Addressing Capability" : "DHCP or Manual IP address", "Maximum Ethernet Cable Length" : "328 ft (100 m)" }, "Dimensions" : "1.63" H x 7.75" W x 5.94" D (41 x 197 x 151 mm)", "Weight" : "1.71 lbs (777 g) without antennas", "Housing" : "Steel", "Power Requirements" : "12 V DC @ 0.4 A, supplied by external power supply (tip positive)" }, "QLXD2 Handheld Transmitter" : { "Mic Offset Range" : "0 to 21 dB (in 3 dB steps)", "Battery Type" : "Shure SB900 rechargeable li-ion or AA batteries 1.5 V", "Battery Runtime @ 10 mW" : { "Shure SB900" : "Up to 10 hours", "Alkaline" : "Up to 9 hours" }, "Dimensions" : "10.1" L x 2.0" Dia. (256 x 51 mm)", "Weight" : "12.2 oz (347 g) without batteries", "Housing" : "Cast aluminum", "Audio Input" : { "Configuration" : "Unbalanced", "Maximum Input Level (1 kHz at 1% THD)" : "145 dB SPL, typical" }, "RF Output" : { "Antenna Type" : "Integrated single band helical", "Occipied Bandwidth" : "< 200 kHz", "X52, X53, X54 Occupied Bandwidth" : "600 kHz", "Modulation Type" : "Shure proprietary digital", "Power" : "1 mW or 10 mW" } } } |