Crown FMX30 Manual de usuario descargar pdf (Pagina 25)

Rev. 1.0

Installation 2—11

You can connect external SCA generators to the SCA In connectors (BNC-type) on

the rear panel. The inputs are intended for the 60 kHz to 99 kHz range, but a lower

frequency may be used if the transmitter is operated in Mono mode. (The 23 to 53

kHz band is used for stereo transmission.) For 7.5 kHz deviation (10% modulation),

input of approximately 3.5–volts (peak-to-peak) is required.

You may feed composite stereo (or mono audio) directly to the RF exciter, bypassing

the internal audio processor and stereo generator. To use the Crown transmitter as

an RF Exciter only (“E” version or when using the “T” version with composite

input), it is necessary to use the Composite Input section of the transmitter. This

will feed composite stereo (or mono audio) directly to the RF exciter. In the “T”

version, this will bypass the internal audio processor and stereo generator. See

Section 2.11 on the next page for caution in using the bypass option.

Input sensitivity is approximately 3.5–volt P-P for 75 kHz deviation.

1. Enable the Composite Input by grounding pin 9 of the Remote I/O connector

(see Section 2–13, Remote I/O Connector).

2. Connect the composite signal to the Composite In BNC connector.

Illustration 2–9 SCA Input Connectors

OFF

SCA IN

COMPOSITE IN

MONITOR

2 3

REMOTE I/O

RIGHT LEFT/MONO

36 VDC

–

CIRCUIT

BREAKER

SCA Inputs

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 55 56

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Crown FMX30 Manual de usuario Pagina 25