User`s manual

USER`S MANUAL FM-SPY-T
File: FM-SPY-T Manual E.DOC MEDIA ENGINEERING page 33/41
name description
Alarm Settings In the alarm section it's possible to define and manage details regarding alarms. The definition
of threshold values is possible for different measuring results. In case a certain threshold is
reached the propre alarm is triggered and a remark in the logging file is made.
In case a definition of an activated alarm is fullfilled the alarm is triggered. As a result one
of the actions “SET Alarm 1” or SET Alarm 2” can be outperformed. In such situations the
alarm LED on the frontpanel labeled AL1 rsp. AL2 is illuminated and - parallel to this - a
photocoupler switch is activated which in turn allows earthfree signalisations to external
devices connected to the AUXILIARY 25pin D-type connector on the rear side (see page 38).
One special application is the definition of a simple “Silence Sensor” rsp. “loss of audio”
alarm: if the deviation is lower than a specified threshold value (e.g. 12…15kHz) for more
than a certain time period (e.g. 60 seconds) one might suspect that the radio station is only
broadcasting the stereo pilot tone (approx. 7kHz dev.) plus the RDS signal (approx. 3kHz)
and has lost its audio (may be because of a computer problem in the harddisk audio system).
C.4.1. DESCRIPTION OF THE DIFFERENT MEASUREMENTS
The main task “MEASUREMENT” shows a number of so called TABs for it’s split in various
measuring tasks such as Signal Scope, Signal Quality, MPX Deviation, MPX Power, MPX
Spectrum and RDS Data.
! All measurements are outperformed according to the recommendations of the ITU-R !