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3. INSTALLATION
The installation must be by an engineer that has skills and
competancy in EMC and radio frequency systems. The
final installation should be in accordance with the site
engineering document at http://www.aareff.com/ETR132.pdf.
3.1 AUDIO INPUT
AUDIO INPUTS accept stereo audio signals of 0 dBu. The RCA /
phono connectors are "Hi-Z" input of 10k ohms. You must use
shielded cable or high quality coaxial to connect this input to the
other equipment. During manufacture and testing the transmitter is
adjusted to a / -75 kHz deviation FM (the maximum allowed)
at 88.0 MHz input +4 dBu.
To comply with the EMC Directive cable used to connect the input to
the other equipment should NOT be longer than 3 meters in length.
To comply with the R&TTE, it is mandatory that the signal level of
the audio input is peak limited with an audio limiter or similar
processor. Upon completion of the installation, the FM deviation
needs to be checked and adjusted so that the audio signal that’s
peak limited gives a maximum deviation of no more than + / -75 kHz.
This deviation is adjusted using VR1 shown in the photo of the
bottom panel. (See Figure 2)
