JRC JSS-296 Service Manual page 216

Subject: Notice for FEC receiving in NBDP mode
1. Objective Equipment
JSS-710/720/800/825/850/296/596/896 etc. MF/HF Radio Equipment
2. Outline
When receiving FEC broadcast in NBDP mode using MF/HF Radio Equipment, the receiving signal
strength would be often changed by fading or external noise as the characteristic of MF/HF frequency
band. If the signal strength would be less than the receiver sensitivity level, any garbled characters
and/or " " would appear on the display or printer output, and furthermore the equipment would stop the
FEC receiving and return to stand-by mode if these symptoms occur continuously. Such as these
symptoms have been well-known to telecommunication operators as usual symptoms of radio
communication, but mates are taking place of them and tend to misjudge it as a malfunction of
equipment these days.
3. Countermeasure
All of the MF/HF radio equipment cannot avoid such symptoms, so if reported similar symptom, explain
the above-mentioned reason to customers referring the attachment. Note that this case is out of
warranty, thus please don't apply compensation order for it.
4. Attachment
Notice for FEC-broadcasting reception using NBDP in MF/HF radio equipment
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Priority:
A: Carry out immediately
B: Carry out at periodical inspection
C: Carry out upon client's request
D: Information and news
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