VRT
Lectrosonics
VRT
Lectrosonics VRT Tracking Receiver Module
This module is used with the Lectrosonics VRM Venue Modular Receiver. It is a triple conversion, frequency synthesized UHF receiver controlled by the DSP in the host assembly. Advanced frequency tracking front-end filters make it excellent for congested and hostile RF environments.
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Manufacturer Specs
Operating Frequencies (MHz) for Receiver Modules:
Block 21 537.600 - 563.100
Block 22 563.200 - 588.700
Block 23 588.800 - 607.900 and 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
Digital latency:
• 1.5 mS (receiver only - hybrid mode)
• 3.0 mS (receiver and transmitter in hybrid mode)
• 3.0 mS (receiver only - analog compatibility mode)
The 3.0 mS latency in analog compatiblity mode time aligns the audio from analog and hybrid transmitters when they are used together in a Venue system.
Frequency selection: 256 frequencies in 100 kHz steps per 25.5 MHz frequency block
Channel Spacing: 100 kHz
Dual Block Range: Built in antenna mulitcoupler covers a two block range.
Pilot tone: 25 to 32 kHz; 5kHz deviation; unique pilot tone frequency for each selected carrier frequency (Hybrid mode)
Deviation: ± 75 kHz (max) (Hybrid mode)
Receiver Type: Triple conversion superheterodyne
Frequency Stability: ±0.001%
Front End Bandwidth:
VR Master: 50 MHz @ -3 dB
VRS Module: 30 MHz @ -3 dB
VRT Module: 11 MHz @ -3 dB
Sensitivity (20 dB Sinad): 0.9 uV
AM Rejection: >60 dB, 2 uV to 1 Volt
Image and Spurious Rejection: 85 dB
Third Order Intercept: VRS:+0 dBm, VRT: +6 dBm
Diversity Methods: Switched, ratio and frequency
FM Detector: Digital pulse counting detector @ 300 kHz
Audio Performance (overall system):
Frequency Response: 32 Hz to 20 kHz (+/-1dB), overall system (400 Series mode)
THD: 0.2% (typical) (400 Series mode)
SNR at receiver output (dB) (in Hybrid operating mode):
SmartNR No Limiting W/ Limiting
OFF 103.5 108.5
NORMAL 107 111.5
FULL 108.5 113
LCD: 122x32 graphical display
Power Requirements: 10 to 18 VDC; 12 W max., (1.2 A at 10 VDC to .67 A @18 VDC)
Block 21 537.600 - 563.100
Block 22 563.200 - 588.700
Block 23 588.800 - 607.900 and 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
Digital latency:
• 1.5 mS (receiver only - hybrid mode)
• 3.0 mS (receiver and transmitter in hybrid mode)
• 3.0 mS (receiver only - analog compatibility mode)
The 3.0 mS latency in analog compatiblity mode time aligns the audio from analog and hybrid transmitters when they are used together in a Venue system.
Frequency selection: 256 frequencies in 100 kHz steps per 25.5 MHz frequency block
Channel Spacing: 100 kHz
Dual Block Range: Built in antenna mulitcoupler covers a two block range.
Pilot tone: 25 to 32 kHz; 5kHz deviation; unique pilot tone frequency for each selected carrier frequency (Hybrid mode)
Deviation: ± 75 kHz (max) (Hybrid mode)
Receiver Type: Triple conversion superheterodyne
Frequency Stability: ±0.001%
Front End Bandwidth:
VR Master: 50 MHz @ -3 dB
VRS Module: 30 MHz @ -3 dB
VRT Module: 11 MHz @ -3 dB
Sensitivity (20 dB Sinad): 0.9 uV
AM Rejection: >60 dB, 2 uV to 1 Volt
Image and Spurious Rejection: 85 dB
Third Order Intercept: VRS:+0 dBm, VRT: +6 dBm
Diversity Methods: Switched, ratio and frequency
FM Detector: Digital pulse counting detector @ 300 kHz
Audio Performance (overall system):
Frequency Response: 32 Hz to 20 kHz (+/-1dB), overall system (400 Series mode)
THD: 0.2% (typical) (400 Series mode)
SNR at receiver output (dB) (in Hybrid operating mode):
SmartNR No Limiting W/ Limiting
OFF 103.5 108.5
NORMAL 107 111.5
FULL 108.5 113
LCD: 122x32 graphical display
Power Requirements: 10 to 18 VDC; 12 W max., (1.2 A at 10 VDC to .67 A @18 VDC)