How to eliminate RFI, hum, clicks, or buzzes in my Orban Processor?
These issues often stem from grounding problems. Review the grounding information. If using analog connections, switching to digital connections can almost certainly eliminate the RFI. Repositioning the unit or its input and output cables may also reduce RF interference. Ensure the composite output is not receiving the MONITOR signal to avoid ground loop noise.
What to do if I hear audible distortion on-air using an Orban Processor?
First, ensure the problem is consistent across multiple receivers and locations to rule out multipath distortion. Verify the source material at the 5500's audio inputs is clean. Be mindful that extreme settings on subjective adjustments can cause distortion. The peak input level must not exceed +27 dBu to prevent the 5500's A/D converter from clipping. If you're using the 5500’s stereo enhancer, this can exaggerate multipath distortion in high multipath environments. If the 5500 is in stand-alone stereo encoder mode, you may be overdriving its left/right protection limiter and/or composite limiter.
Why is there audible noise on-air when using my Orban 5500 Processor?
Excessive compression can exaggerate noise in the source material. The overall noise performance is often limited by the analog-to-digital converter's overload-to-noise ratio, so drive the 5500 with professional levels (more than 0 dBu reference level) to achieve adequately low noise. If using an analog studio-to-transmitter link (STL), compression in the 5500 can amplify STL noise.
Why are my on-air levels unexpectedly quiet using my Orban Processor?
The ITU412 multiplex power controller may have been turned on accidentally. The 5500 may be in stand-alone stereo encoder mode, which is determined by the active on-air preset. Also, the 5500 may not be controlling peak modulation as desired.
How to troubleshoot a whistle on-air, especially in stereo, with my Orban Processor?
Check the analog or digital outputs with a spectrum analyzer to see if the spurious tone can be detected there. If it appears at both outputs, it is probably an input problem. If it only appears at the analog output, then it is likely a problem with the left/right D/A converter or other analog circuitry. If it appears only when you use the composite output, then it is likely a problem in the composite D/A converter or output amplifiers. Power supply oscillation, STL problems, or exciter problems can also be the cause.
What can cause poor peak modulation control in Orban Processors?
Check whether the final clipper is active. Also, make sure that the output is not receiving the MONITOR signal.
Why won't my Orban 5500 Processor pass line-up tones at 100% modulation?
Sine waves have a very low peak-to-average ratio by comparison to program material. The 5500 can generate test tones itself and can also be put into Bypass mode (locally or by remote control) to enable it to pass externally generated tones at any desired level.
Why is there an unexpected delay between the program feed and the on-air signal from my Orban Processor?
The diversity delay may have been accidentally applied to the output you are using to drive your transmitter.
What to do if the system receiving my Orban 5500's digital output will not lock?
Be sure that the 5500’s output sample rate is set match the sample rate that the driven system expects. Also, be sure that the 5500’s output FORMAT (AES3 or SPDIF) is set to match the standard expected by the driven system.
What does a “Communications Board Error” message mean on my Orban Processor?
This can be caused by applying an AES3, AES3id, AES11, or AES11id to the 10 MHz/wordclock input.
General| Category | Audio Processor |
|---|---|
| Channels | Stereo |
| Dynamic Range | >110 dB |
| Power Supply | 100-240V AC, 50/60 Hz |
| A/D Conversion | 24-bit |
| D/A Conversion | 24-bit |
| Input Types | Analog, AES/EBU |
| Output Types | Analog, AES/EBU |
| Presets | User-defined presets |
| Sample Rate | 44.1 kHz |
Explains the capabilities of the all-digital OPTIMOD-FM 5500 for FM stereo broadcasting.
Details the 5500's transmitter protection and audio processing for FM broadcast.
Highlights the 5500's analog and AES3 digital inputs/outputs and its DSP-based stereo encoder.
Explains that the 5500 features four processing structures for different audio needs.
Covers remote control options, including GPI ports and PC Remote software communication.
Discusses the two types of presets: factory presets and user presets.
Details the simultaneous accommodation of digital AES3, analog inputs/outputs, composite stereo outputs, and subcarrier inputs.
Describes the eight optically-isolated GPI inputs for controlling functions via 5-12V DC pulses.
Covers RS-232 serial and Ethernet ports for PC interfacing, remote control, and software upgrades.
Explains how processing and filtering are precisely controlled to prevent over-modulation and aliasing distortion.
Guides through the process of unpacking, mounting, connecting inputs/outputs, power, and computer interface.
Details the various audio and digital input/output connections, including cable recommendations.
Guides users through the initial setup of the 5500 in audio processor mode.
Provides additional steps for setting up the 5500 in stand-alone stereo encoder mode.
Details adjustments for analog and digital input/output configurations and reference levels.
Explains how to set the system clock and program automation events.
Covers setting up security levels and managing passcodes for access control.
Describes the front panel controls, including screen display, soft buttons, rotary knob, recall, modify, setup, and escape buttons.
Explains the operation of the 5500 when used solely as a stereo encoder.
Guides users on adjusting subjective setup controls for station sound customization.
Describes factory recommended settings for various program formats, serving as starting points for sound customization.
Details the equalization controls, including bass shelving and parametric EQ for the Five-Band structure.
Explains the controls for the stereo enhancer, which increases stereo difference signal during transients.
Covers the Automatic Gain Control settings common to Two-Band and Five-Band structures, including advanced controls via PC Remote.
Lists common problems and their potential solutions, covering RFI, quiet levels, peak control, distortion, noise, and connection issues.
Addresses RFI and hum issues, suggesting grounding review and cable repositioning.
Suggests checking the ITU412 multiplex power controller and the active on-air preset.
Recommends checking the final clipper activity and ensuring the correct output is used.
Advises verifying source material cleanliness and checking for extreme subjective adjustment settings.
Discusses how excessive compression can exaggerate source material noise and introduces the 5500's noise fighting systems.
Attributes this to excessive HF boost in EQ/Enhancer or high settings of BAND 4 MIX/MIX controls.
Covers potential connection problems like UI slowdown, quick setup issues, and software update problems.
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