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FM-531HD / May 2013
G E N E R A L I N F O R M A T I O N
Arbitron People Meter (PPM)
Field experience has been that Wheatstone audio processors favorably passes the
data watermarking scheme used in the Arbitron People Meter rating service technol‑
ogy, regardless of the aggressiveness of the processing being performed.
AC Power Considerations
Please note that in order to enhance its long‑term reliability, the FM‑531HD has no
power switch (switches usually become intermittent over time without regular use).
The FM‑531HD accepts AC line input voltages between 90 and 260 VAC, 50 or
60Hz. Power consumption is under 100VA.
Although aggressive AC input filtering is utilized on the AC power input it is al
‑
ways advisable to use external surge protection and an uninterruptible power supply
(UPS) wherever possible, especially where the AC power quality can be in question,
such as at a remote transmitter site.
Power conditioning, surge suppression, and even power backup devices are wise
investments when using sensitive modern electronic devices. The FM‑531HD is, after
all, a highly specialized “computer.”
The use of a UPS (uninterruptible power supply) is usually recommended and will
protect the FM‑531HD from short duration power interruptions and glitches which
might otherwise signal it to reboot. When the FM‑531HD reboots there will be a loss
of audio for approximately 15 seconds.
Summary of Contents for FM-531 HD
Page 2: ...Technical Manual Wheatstone Corporation May 2013 FM HD Digital Audio Processor FM 531hd...
Page 122: ...page A 2 FM 531HD May 2013 A P P E N D I C E S Appendix A General Specifications A 3 Contents...
Page 128: ...page A 8 FM 531HD May 2013 A P P E N D I C E S Appendix B FM 531HD GPI Interface A 9 Contents...
