AEV Stargate - Mono; Stereo Mode; Output Level; RDS Level; Overview of the RDS Service

AEV STARGATE
Futurcom Srl via della Tecnica 35, 40050 Argelato Bologna ITALY
7
These are the controls which enable the encoder’s L and R channels.
Press the switch to enable the L/R channels; the relevant led will illuminate.
Mono / Stereo Mode
This control enables and disables the coder modulator.
Pressing the STEREO switch changes between MONO and STEREO operation.
In the mono position the 19 KHz subcarrier is automatically disabled and the output becomes
equal to the average of the L and R channels: (L+R)/2.
Output level
Output level is the adjustment for the input signal level; it may be varied using 2 multi-turn
trimmers.
The MPX output is adjustable from 0 to +12 dBu.
The output RDS is adjustable from infinite to -16 dBu.
The output should be adjusted for maximum permissable deviation at the transmitter
RDS level
RDS level is the adjustment for the RDS signal level; it may be varied using a multi-turn
trimmer.
The RDS output is adjustable from infinite to -16 dBu.
SCA input level
The points raised in the preceeding paragraph apply to this control apart from the range
which is from +6 to -14 dBu.
Configurations and in/ out connections
Connections
It is recommended that for input/output connections, a high quality flexible cable with a good
screen is used.
Special attention should be paid to the grounding of the unit and the quality of the line supply
ground connections. GROUND and CHASSIS connections between units should be kept
separate in order to avoid interference caused by earth loops.
Inputs / Outputs
The XLR inputs are electronically balanced with an input impedance of 10 k_.
The range of input levels is from -20 dBu to +10 dBu.
The output is unbalanced on a BNC connector situated on the rear panel. This output can
drive an impedance of 50 or 75 ohm at a distance of upto 100 m using RG 58 coaxial cable
before any appreciable degradation of the composite signal takes place.
The level can be adjusts in a range from 0 to +12 dBu.
An other input can accept SCA signal which may be regulated by trimmer and summed with
the MPX output signal.
An input or output are available for external synchronization (selectable via dip-switch
"PRESET"):
19 KHz IN 1 Vpp SqW ± 2 Hz for locking to external coders.
19 KHz OUT 1 Vpp SqW for locking by external coders.
Positioning of STARGATE
The best position for the STARGATE is as close as possible to the transmitter, in order to