VX150 TO VX2 INSTALLATION MANUAL PROGRAM INPUTS
PAGE 1.7.2 VERSION 0.3 2021-01-14
NOTE: Transmitters are factory set to provide 100% modulation (± 75 kHz) with an analog L/R input
level of precisely 1.24 V rms (+4.7 dBu).
MPX/SCA Inputs
NOTE:
Transmitters are factory set to provide 10% modulation (± 7.5 kHz) with an SCA input level of
precisely 1.0 V rms (2.8 V pk-pk). If the main program source is MPX input, meters for MPX SCA will
display “N/A”.
Two unbalanced inputs (20 kHz to 100 kHz) are provided on the MPX SCA1 IN and MPX SCA2 IN
female BNC connectors, which accept pre-modulated SCA information. The levels are nominally 2.8 V
pk-pk for ± 75 kHz carrier deviation, and are adjustable between 1.0 V and 5 V pk-pk. The input
impedance for each input is 10 k.
Digital Inputs
Each VX series transmitter exciter accepts the following digital inputs:
AES/EBU Inputs
The VX series transmitter accepts AES/EBU digital audio via the AES/EBU IN 1 and AES/EBU IN 2, 3-pin
female XLR connectors (110 balanced; supports sample rates between 32 to 192 kHz). The VX series
transmitter's remote AUI or front panel UI allows for configuration of the audio input mode (left, right
or stereo) and level (in dBfs). Default factory setting is -4.0 dBFS.
RBDS/RDS Input
NOTE: The VX transmitter also supports stand-alone RBDS/RDS operation. In this mode, RBDS/RDS
parameters are configured through the remote AUI or front panel UI.
The VX transmitter accepts UECP or ASCII data for its internal RBDS/RDS generator via RS-232 on the
RDS/RBDS (A1J3A) 9-pin, female D-type connector. The data is framed and modulated on a 57 kHz sub-
carrier, which forms part of the composite signal.
Other Features
Carrier Frequency and Pilot Phase Control (10 MHz and 1 PPS IN)
Each VX series transmitter provides carrier frequency and pilot phase control from a precision GPS
reference on the exciter’s 10 MHz IN female BNC connector (between 0.5 V and 2 V pk-pk sine wave
input; 50 ) and 1 PPS IN female BNC connector (5 V TTL input level, 10 k).
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