Specifications

EMC-CS-2009.1

February 11, 2010

D.4 Transient Application Mode

Application of transient pulses A1, A2 and C to the DUT are facilitated using three different operating modes.

Mode 1 represents a condition where the test pulse is applied at a fixed repetition rate as shown in Table D-1 below. Mode 1

is applicable for pulses A1 and A2 only when applied to DUT switched power supply circuits.

Table D-1: CI 220 Mode 1 Characteristics

Transient Pulse

Pulse Repetition Rate

(PRR)

Duration

A2-1

0.2 Hz,

10% duty cycle

120 sec

Mode 2 represents a condition where test pulses are applied using a pseudo- random timing sequence as illustrated in Figure

D-11. Mode 2 is only used with test pulse A1 when applied to DUT inputs. The time "T" is 50 ms.

Mode 3 represents a condition where test pulses are applied using pseudo- random bursts as illustrated Figure D-12. The

timing sequence is identical to that used for Mode 2. Mode 3 is used only with test pulses A2-1, A2-2, C-1, and C-2. The

bust time "T" is 50ms.

Modes 2 and 3 is also used when performing testing per RI 130 (see section 13).. Modes 1, 2 and 3 are produced by the

transient generator circuit presented in Annex F.

Figure D-11: CI 220 Mode 2 Characteristics

5T T

T5T T

2T T

3T T

T5T

T = 50 msec

Pulse Timing

Sequence

Resulting Transient

Sequence