USB-to RS232 Convertor Behaviour

G

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GRC

I7561 convertor displays time-out error problem when dnlding large Windows-based MMI files. But, not so when dnlding DOS-based ones. Checked TXD/RXD voltages (8.7-to-9.2v). The same convertor (about 2 months old) was working fine with same s/w.
 
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