USB to Serial Converter (42855) latency timer

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HalfBloodPrince
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by HalfBloodPrince » Thu Jul 30, 2015 9:32 am
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Hello there, I recently purchased an USB to Serial converter http://www.lindy-usa.com/usb-to-serial- ... 42855.html
So what I'm tryin' to do is connect a QRSdiagnostic ecg, which has a RS232 output, with my laptop, through an USB port. All seems to be good, but the ecg signal is arriving too slowly, so after being in touch with QRSdiagnostic tech support I've found out that I need to change an advanced setting in the COM port created by this cable, in particular I need to set the latency timer to 2 ms, but when I go into the advanced settings of the COM port there isn't any option to let me do this operation.
Is there anyone able to tip me?
LINDY John
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by LINDY John » Thu Jul 30, 2015 10:27 am
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Hi,
I'm afraid unlike the FTDI chipset's there is no facility to change the latency timer on the 42855, which uses a Prolific chipset.
HalfBloodPrince
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by HalfBloodPrince » Thu Jul 30, 2015 10:59 pm
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So what do you suggest me?
LINDY John
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by LINDY John » Fri Jul 31, 2015 9:36 am
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If you require control over the Latency then you would have to consider using an adapter with the FTDI chipset such as http://www.lindy.co.uk/usb-firewire-c4/ ... rs232-p484
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