Crown Low Power Transmitters - Crown Broadcast

2.7 SCA Input Connections
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.
SCA IN COMPOSITE IN MONITOR
RIGHT
LEFT/MONO
R
L
REMOTE I/O
1
2 3
SCA Inputs
CIRCUIT
BREAKER
OFF
+
–
B
A
T
T
E
R
Y
36 VDC
Illustration 2–14 SCA Input Connectors
2.8 Composite Input Connection
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.
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 Illustration 2–17).
2. Connect the composite signal using the Composite In BNC connector.
2–12 FM30/FM100/FM250 User's Manual