Specifications

1–3
Getting Acquainted
1.2 Applications and Options
Crown transmitters are designed for versatility in applications. They have been used
as stand-alone and backup transmitters and in booster, translator, and satellator
applications. The following discussion describes these applications further.
Model numbers describe the configuration of the product (which has to do with its
intended purpose) and the RF output power which you can expect.
The number portion of each name represents the maximum RF output power. The
FM500, for example, can generate up to 500 watts of RF output power.
Suffix letters describe the configuration. The FM500T, for example, designates a
"transmitter" configuration. Since this is standard, it is what is described in the
manual except where specified. In this configuration, the product includes the
following modules (functions):
❑ audio processor
❑ stereo generator
❑ RF exciter
❑ metering
❑ low-pass filter
Illustration 1–2 Standard (Transmitter) Configuration
RF Exciter
Metering
Low-pass Filter
Stereo Generator
Audio Processor
FM500
FM BROADCAST TRANSMITTER
®
Power
Carrier
Modulation
Fault
Stereo
Mono RF Output
ProcessingInput Gain
Wide Band
High Band
Audio Input
High
Low
2
-6
-12
-18
2
+6 dB
+12 dB
10
20
Expand
Compress
RF Power
SWR
ALC
PA DC Volts
PA DC Amps
PA Temperature
Supply DC Volts
Voltmeter
SWR
Lock
Input
PA DC
PA Temp
Over
100
90
80
70
60
50
40
30
20
Pilot