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Specifications–AXT400 Receiver
RF Carrier Frequency Range
470–952 MHz
Note: varies by region
Working Range Under typical conditions:
150 m (500 ft)
Line of Sight, outdoors for a single system:
500 m (1600 ft)
Note: Actual range depends on RF signal absorption, reflection and interference.
Audio Frequency Response
40 – 18 kHz (+1, -3 dB)
Note: Dependent on microphone type
RF Tuning Step Size
25 kHz
Modulation
45 kHz max. deviation
FM, Audio Reference Companding with pre- and de-emphasis
Dynamic Range XLR Output:
>118 dB, A-weighted
AES3 Output:
>130 dB, A-weighted
Image Rejection
>120 dB, typical
RF Sensitivity
-110 dBm for 12 dB SINAD, typical
Spurious Rejection
>110 dB, typical
Ultimate Quieting
>110 dB, A-Weighted
Squelch Quieting
>115 dB, A-Weighted
Latency
<1 ms
Total Harmonic Distortion
45 kHz max. deviation
<0.3%, A-weighted, typical
System Audio Polarity
Positive pressure on microphone diaphragm (or positive voltage applied to tip of WA302 phone plug) produces
positive voltage on pin 2 (with respect to pin 3 of low-impedance output) and the tip of the high impedance 1/4-
inch output.
Gain Adjustment Range
0 to -30 dB (in 1 dB steps), plus Mute setting
Dimensions
44 mm x 483 mm x 366 mm (1.7 in. x 19.0 in. x 14.4 in.), H x W x D
Weight
5.5 kg (12.0 lbs)
Housing
Steel; Extruded aluminum
Power Requirements
100 to 240 V AC, 50-60 Hz
Current Drain
1.1 A RMS (referenced at 120 V AC)
Operating Temperature Range
-18°C (0°F) to 63°C (145°F)
Storage Temperature Range
-29°C (-20°F) to 74°C (165°F)
System Gain
In an audio system containing both AXT400 and UR4 receivers, the overall system audio gain at the XLR (line) output varies depending on the receiver model and the type of
transmitter.
The table below offers a comparison of the output gain at the XLR output for AXT400 and UR4 receivers for each transmitter model. Use the information in the table to
achieve consistent gain levels when using systems comprised of both Axient series and UR series components.
System gain from transmitter input to receiver XLR output (line) when transmitter gain = 0 dB
Transmitter AXT100 Bodypack AXT200 Handheld UR1 Bodypack UR1M Bodypack UR2 Handheld
gain = 0 dB gain = 0 dB gain = 0 dB gain = 0 dB gain = 0 dB
sens = 0 dB sens = 0 dB
Receiver AXT400 +10 dB gain +15 dB gain +15 dB gain +15 dB gain +15 dB gain
gain setting = 0 dB UR4 N/A N/A +18 dB gain +18 dB gain +18 dB gain
Firmware Updates
Firmware is embedded software in each component that controls functionality. Periodically, new versions of firmware are developed to incorporate additional features and
enhancements. To take advantage of design improvements, new versions of the firmware can be uploaded and installed using the Firmware Update Manager tool available in
WWB6 software. Firmware is available for download from http://www.shure.com/wwb.