Summary
The 5500is Orban’s new value-oriented two-band and five-band audio processor that can
also serve as a stand-alone stereo generator. It combines 5300 and 2300 functionality and
adds several new features:
- 10 MHz frequency reference input allows the pilot tone frequency to be locked to GPS or another high-accuracy frequency standard. This improves the performance of singlefrequency networks in areas where coverage of the transmitters overlaps.
- Cool-running switching power supply saves energy and reduces heat build-up in the chassis
- Use of the latest dual-core DSP chip technology from Freescale Semiconductor allows us to reduce cost compared to the 5300 and 2300.
User-Friendly Interface
- An LCD and full-time LED meters make setup, adjustment and programming of OPTIMOD-FM easy — you can always see the metering while you are adjusting the processor. Navigation is by dedicated buttons, soft buttons (whose functions are contextsensitive), and a large rotary knob. The LEDs show all metering functions of the processing structure (Two-Band or Five-Band) in use.
Absolute Control of Peak Modulation
- The 5500 provides universal transmitter protection and audio processing for FM broadcast. It can be configured to interface ideally with any commonly found transmission system in the world.
- The 5500 provides pre-emphasis limiting for the two standard pre-emphasis curves of 50"s and 75"s. Its pre-emphasis control is seldom audibly apparent, producing a clean, open sound with subjective brightness matching the original program.
- The 5500 achieves extremely tight peak control at all its outputs — analog left/right, AES3 left/right, and composite baseband.
- By integrating the stereo encoder with the audio processing, the 5500 eliminates the overshoot problems that waste valuable modulation in traditional external encoders. The stereo encoder has two outputs with independent level controls, each capable of driving 7#$%in parallel with 47,000pF, (100ft / 30m of coaxial cable).
