SP506CF datasheet(24/30 Pages) SIPEX

24 / 30 page

SP505/6/7APN/03

SP505, SP506, SP507 Application Note

More Compliancy....

In order for networking equipment to be

connected in the European network or even

offered in Europe, it must be thoroughly tested

to a set of specifications. Serial ports are no

exception to the rule and are tested to ensure

compliancy to their respective ITU specifications.

This is to ensure proper operation to the public

network as the equipment is connected. This is

a requirement in order to obtain the "CE" mark

for European compliance.

In January of 1998, CTR1/CTR2 compliancy

could officially be attained by using another test

option called TBR2. The Technical Basis for

Regulation specification was recently finalized

and approved for use as a test criteria for

certification. Similar to NET1/2, the testing

ensures that the serial port adheres to the ITU-T

V-Recommendations. It specifies the connector

type and the signals required between the DTE

and DCE. However, there are some minor

testing differences.

Paragraph 6.3.1 – V.10 Interface

6.3.1.1 Generator open circuit output voltage

The single-ended generator or driver's output

(point A), for either binary state, shall be less

than or equal to 12.0V when terminated with a

3.9k

Ω resistor to ground (point C).

6.3.1.3 Generator output rise/fall time

The driver output's transition from one binary

point to another shall be less than or equal to 0.3

of the nominal bit duration (t

b). This is measured

between 10% and 90% of its steady state value

and with a 450

Ω resistor load to ground.

6.3.1.4 Generator polarities

The driver's single-ended output A shall be:

a) greater than point C (V

OUT > 0V) when the

signal condition 0 is transmitted for data

circuits, or ON for control circuits; and

b) less than point C (V

OUT < 0V) when the signal

condition 1 is transmitted for data circuits, or

OFF for control circuits.

Figure 39. V.10 Driver Open Circuit Voltage

6.3.1.2 Generator terminated output voltage

The driver output's magnitude, for either binary

state, shall be greater than or equal to 2.0V when

terminated with a 450

Ω resistor to ground.

Figure 40. V.10 Driver Terminated Voltage

Figure 41. V.10 Driver Transition Time

3.9k

Ω

450

Ω

450

Ω

Oscilloscope

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