Lectronics VR Field Reference Manual - page 30
VR Field Receiver
LECTROSONICS, INC.
0
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:
3.0 mS (whole system, Digital Hybrid transmitter)
3.0 mS (whole system, analog transmitter*)
1.5 mS (receiver only, Digital Hybrid mode)
3.0 mS (receiver only, analog compatibility mode*)
*delay is added to analog channels to align them with digital channels
Frequency selection:
256 frequencies in 100 kHz steps
Dual Block Range:
Built in antenna mulitcoupler covers a two block range.
Block 21/22 537.600 - 588.700
Block 22/23 563.200 - 614.300 (excluding 608.000 to 614.000)
Block 23/24 588.800 - 639.900 (excluding 608.000 to 614.000)
Block 24/25 614.400 - 665.500
Block 25/26 640.000 - 691.100
Block 26/27 665.600 - 716.700
Block 27/28 691.200 - 742.300
Block 28/29 716.800 - 767.900
Pilot tone:
25 to 32 kHz; 5kHz deviation; unique pilot tone frequency for each selected carrier frequency, (Digital Hybrid mode)
Deviation:
± 75 kHz (max), (Hybrid mode)
Receiver Type:
Triple conversion, superheterodyne
Frequency Stability:
±0.001 %
Front End Bandwidth:
VRF (VR Field Master):
50 MHz @ -3 dB
VRS (Standard Module):
30 MHz @ -3 dB
VRT (Tracking Module):
11 MHz @ -3 dB
Sensitivity (20 dB Sinad):
0.9 uV
AM Rejection:
>60 dB, 2 uV to 1 Volt
Image & Spurious Rejection:
85 dB
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 (using a UM400 transmitter in Digital Hybrid mode)
THD:
0.2% (typical), (Digital Hybrid (400 Series) mode)
SNR at receiver output (dB)
(in Hybrid operating mode):
(Note: the dual envelope “soft” limiter provides
exceptionally good handling of transients using
variable attack and release time constants.
The gradual onset of limiting in the design begins below full modulation, which reduces the measured figure for SNR without limiting by 4.5 dB).
Input Dynamic Range:
125 dB (with full transmitter limiting)
Audio Output Level:
-15 dBu to +8 dBu, in 1 dB increments
LCD:
122x32 graphical display
Power Requirements:
10 to 18 VDC; 17.2 W max. (1.72 A @ 10 VDC to 1.05 A @ 18 VDC)
Weight (not including battery):
VR Field with 6 VRS modules & clips: 5.77 lbs. (2619 g)
VR Field with 6 VRT modules & clips: 5.86 lbs. (2660 g)
Dimensions:
11.88”W x 3.5”H x8.25”D* (30.18 cm x 8.89 cm x 19.67 cm)
*(Depth measured from cover to end of BNC jacks, add 1.5” for rear handle)
Note: Some specifications apply only when the receiver is operating in the 400 Series (Digital Hybrid) mode.
Specifications
SmartNR
No Limiting
w/Limiting
OFF
NORMAL
FULL
103.5
107.0
108.5
108.5
111.5
113.0