Quatech DSCLP/SSCLP-100 user manual

Page 36

Data Rate

 

Maximum Load (pF)

 

4%

10%

15%

20%

25%

(kbaud)

trans

trans

trans

trans

trans

 

time

time

time

time

time

921.6

N/A

100

300

430

470

460.8

100

430

670

900

1100

230.4

330

900

1100

1630

2000

115.2

800

1570

3300

4300

4800

Note 1: The signal transition time ratio is defined as the percentage of the unit interval or bit time (the inverse of the data rate) that is occupied by the signal transitioning from -3V to +3V. The EIA/TIA-232-E standard defines a maximum signal transition time ratio of 4%; most RS-232 receivers will recognize signal transitions with much larger ratios. With a 4% signal transition time ratio, EIA/TIA-232-E is limited to a theoretical data rate of 200 kbaud. If maximum signal transition time ratio is extended to 10%, 15%, 20%, or even 25%, the maximum data rate achievable using EIA/TIA-232-E can be increased past 200 kbaud.

Note 2: A typical value for capacitance per foot of standard cable is 50 pF/ft.

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DSCLP/SSCLP-100 User's Manual

Image 36
Contents DSCLP/SSCLP-100 Warranty Information Page Declaration of Conformity Windows Configurations Address Map and Special RegistersBase Address and Interrupt Level IRQ Enhanced Serial Adapter IdentificationGeneral Information Hardware Configuration Factory Default ConfigurationEnable Scratchpad Register SPAD, J2 Clock multiplier jumper options Hardware Installation Jumper/connector locationsPort Address Range Enabling the Special Registers Interrupt Status RegisterOptions Register Bit Name DescriptionClock Rate Multiplier RR1 RR0Windows Millennium Windows Windows Windows Using the New Hardware Found Wizard Page Viewing Resources with Device Manager Page Page Dual-Port RS-232 Serial Adapter Page Page For legacy applicattions which cannot Page Page Other Operating Systems Windows NTOS/2 DOS and other operating systemsQTPCI.EXE QTPCI.EXE Expert Mode display External Connections RS-232 Port Signal PCI Resource Map SSCLP-100Specifications ICL3245CAPage Troubleshooting Computer will not boot upDSCLP/SSCLP-100