Inovonics 510, Инструкция по эксплуатации и техническому обслуживанию

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FIRMWARE S ELECT ION
The Model 510 comes with appropriate firmware to decode both the
European and the United States RDS standards. Though these have
nearly merged into a single standard, a few differences such as
program format identifiers still persist. It is therefore important
that the proper firmware is selected to decode the RDS data stream
properly.
Firmware is selected by a jumper on the circuit board. The 510 will
have been factory-jumpered appropriately for the shipping
destination. This can be confirmed, or changed if necessary, by
removing the top cover of the unit and locating the jumper, JP1, just
beside memory chip IC8. The two jumper options are illustrated
below.
Universal R DS S tandard US -only “R BDS ” S tandard
COMPOS IT E INPUT
The rear panel
COMPOS IT E INPUT
BNC connector may be fed from
the composite/multiplex output of an off-air receiver or the station’s
Modulation Monitor. This is an unbalanced/bridging input that will
accept a composite signal between 1 and 10 volts p-p, corresponding
to full carrier modulation of ± 75kHz deviation.
INPUT L E VE L
Control
A rear panel multiturn trim control labeled INPUT LEVEL adjusts
the sensitivity of the Model 510. For basic RDS decoding and
display, the setting of this control is not at all critical. As long as
the front-panel
RDS LOCK
indicator lights solidly when an RDS
station is tuned, data should be decoded accurately. However, one
important function of the Model 510 is to display the injection level
of the RDS subcarrier directly in percent of total modulation. For
this reading to be accurate the control must be adjusted properly.
Input Calibration The Model 510 is calibrated with reference to 100% (± 75kHz
deviation) modulation. This requires a composite/multiplex input to
the Model 510 that represents this 100% level. Some Mod-Monitors
have an internal calibration source that will supply this signal from