User's Manual

Digital Hybrid Wireless
®
Modular Receiver System
Rio Rancho, NM, USA
27
Specifications
Operating Frequencies - Host Mainframe
VRM2WBL: Tunes to bands A1, B1, B2, C1
VRM2WBM: Tunes to bands B1, B2, C1, C2
Operating Frequencies - VRT2 Module
Band A1: 470.100 - 537.575 MHz (blocks 470, 19, 20)
Band B1: 537.600 - 614.375 MHz (blocks 21, 22, 23)
Band B2: 563.200 - 639.900 MHz (blocks 22, 23, 24)
Band C1: 614.400 - 691.175 MHz (blocks 24, 25, 26)
Band C2: 640.000 - 716.700 MHz (blocks 25, 26, 27)
Frequency selection: Up to 3072 frequencies
Frequency selection steps: Selectable; 100 kHz or 25 kHz
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 compatibility mode time aligns the audio
from analog and hybrid transmitters when they are used together in a
Venue system.
Wideband Multicoupler: Built in antenna mulitcoupler
covers a 230 MHz 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 %
Multicoupler Bandwidth: 470 - 691 MHz or 537 - 768 MHz
Front End Bandwidth: • iQ filter wide mode: 15 MHz
• iQ filter narrow mode: 10 MHz
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: • iQ filter wide mode: +5 dBm
• iQ filter narrow mode: +12 dBm
Diversity Methods: • Antenna Combining Phase
switching
• Opti-blend
TM
ratio diversity
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 107.0 111.5
FULL 108.5 113.0
(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: -35 dBu to +8 dBu, in 1 dB
increments
LCD: High resolution graphical display
Power Requirements: 10 VDC/2A to 18 VDC/1.2A
Weight: 4.4 lbs. (1984 grams) with
six modules
Dimensions: 19”W x 1.75”H x 7.75”D (panel to
rear jacks)
(48.26 cm x 4.45 cm x 19.67 cm)
Specifications and Features subject to change without notice.
Note: Some specifications apply only when the
receiver is operating in the Digital Hybrid (400
Series) mode.