Lectrosonics UCR401 Compact UHF Wireless Microphone Receiver

The UCR401 is a high performance compact UHF wireless microphone receiver for mobile applications such as ENG and film production. The compact size, battery and external power and rugged attached antennas are ideal for video camera mounted use. Unique DSP algorithms in the design provide full compatibility with all Lectrosonics 400 Series Digital Hybrid Wireless™ transmitters and variety of analog transmitters from Lectrosonics and some other manufacturers. Power is provided by two AA batteries, typically NiMH rechargeable types, or external DC supplied via a jack on the rear panel.

Microprocessor control enables SmartSquelch™ and SmartDiversity™ advanced reception techniques to minimize noise and dropouts in all conditions. The receiver differentiates between close and distant operation and adjusts the squelch threshold automatically. In environments with significant RF reflections, the diversity switching activity optimizes the antenna combining based upon an analysis of RF level and audio content.

Finding a clear operating channel is simplified with a choice of 256 frequencies across a 25.6 MHz bandwidth. A built-in RF spectrum analyzer scans the entire tuning range of the receiver and displays RF activity on the built-in LCD. Signal strength of other signals in the vicinity is indicated and empty sections of the spectrum are quickly identified with the graphical display. The analyzer will scan the entire spectrum and display the results in about 25 seconds, so it is very convenient to find a clear frequency in each new location.

Digital Hybrid Wireless®
SmartSquelch™ for noiseless muting
SmartDiversity™ for enhanced RF reception
256 selectable UHF frequencies
DSP-based pilot tone squelch
LCD display with spectrum scanner
Balanced XLR audio output
Two AA batteries or DC power
Compatiblity with analog transmitters

Operating Frequencies (MHz):
Block 470	470.100 - 495.600
Block 19	486.400 - 511.900
Block 20	512.000 - 537.500
Block 21	537.600 - 563.100
Block 22	563.200 - 588.700
Block 23	588.800 - 607.900 614.100 - 614.300
Block 24	614.400 - 639.900
Block 25	640.000 - 665.500
Block 26	665.600 - 691.100
Block 27	691.200 - 716.700
Block 28	716.800 - 742.300
Block 29	742.400 - 767.900
Block 944	944.100 - 951.900 Export only
Frequency Adjustment Range	25.5 MHz in 100 kHz steps
Channel Separation	100 kHz
Receiver Type	Triple conversion, superheterodyne, 244 MHz ,10.7 MHz and 300 kHz
Frequency Stability	±0.001 %
Front end bandwidth	30 MHz @ -3 dB Sensitivity
20 dB Sinad	1 uV (-107 dBm), A weighted
60 dB Quieting	1.5 uV (-104 dBm), A weighted
Squelch quieting	Greater than 100 dB
AM rejection	Greater than 60 dB, 2 uV to 1 Volt (Undetectable after processing)
Modulation acceptance	85 kHz
Image and spurious rejection	85 dB
Third order intercept	0 dBm
Diversity method	Phased antenna combining - SmartDiversity™
FM Detector	Digital Pulse Counting Detector operating at 300 kHz
Antenna inputs	Two, fixed whip Audio outputs Rear Panel XLR adjustable from -50 dBu to +5 dBu in 1 dB steps. Calibrated into a typical 10 k Ohm balanced load. Can drive 600 Ohm load.
Front Panel Controls and Indicators - LCD control panel
Main window	Pilot tone; antenna phase, receiver battery level;transmitter battery status; audio level, RF level
Frequency window	Frequency, TV channel; Transmitter switch setting
Audio output level adjustment	-50 dBu to +5 dBu
Battery level tracking	• 0.1V steps, accuracy +/- 0.2V • Timer option available for NiMH batteries
Scanning mode	Coarse and fine modes for RF spectrum site scanning
Audio test tone	1 kHz, -50 dBu to +5 dBu output in 1 dB steps;less than 1% THD
Transmitter battery type selection	9 V alkaline, 9 V lithium, AA alkaline, AA lithium, TIMER
Phase invert	Audio output phase normal or inverted
Smart NR (noise reduction)	OFF, NORMAL, FULL modes(avail in 400 Series mode only)
Audio Performance (overall system)	(These specs apply to 400 Series mode only.)
Frequency Response (Typ.)	32 Hz to 20 kHz (+/- 1 dB) System frequency response varies depending on transmitter used
THD:	0.2% (typical)
SNR at receiver output (dB)
SmartNR Off	103.5 no limiting; 108.0 w/limiting
SmartNR Normal	107.0 no limiting; 111.5 w/limiting
SmartNR Full	108.5 no limiting; 113.0 w/limiting
Input Dynamic Range	125 dB (with full Tx limiting)
Rear Panel Controls and features	XLR balanced audio output jack; External DC input; Battery compartment acces
Power Options
Ext DC	Minimum 6 Volts to maximum 18 Volts DC;1 W consumption, 80 mA at 12 VDC
Int Batt	Two AA 1.5 Volt alkaline, lithium or NiMH;
Battery Life (typical)
AA alkaline	4 hours continuous, up to 10 hours intermittent
AA lithium	Up to 11 hours (continuous and intermittent)
AA NiMH (2500 mAH)	7.5 hours per charge typical (continuous and intermittent)
Weight	13 oz with batteries.
Dimensions	2.83" wide, 1.25" high, 4.64" deep (2.83 mm x 32 mm x118 mm)

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