Agilent Technologies N5980A Bedienungsanleitung PDF herunterladen (Seite 9)

Serial BERT N4906B, Data Sheet V.3

Figure 16: Output blanking

Auxiliary Input

When the alternate pattern mode is activated the

memory will be split into two parts. The user can

define a pattern for each part. Depending on the

operational mode of the auxiliary input the user

can switch in real-time the active pattern by apply-

ing a pulse (mode 1), or by a logical state (mode 2),

to the auxiliary input.

If the alternate pattern mode is not activated the

user can suppress the data on the data output by

applying a logical high to the auxiliary input (mode

3).

Mode 1: one-shot edge sensitive alternating

pattern

A rising edge on the auxiliary input inserts a

single version of pattern B into repetitions of

pattern A. The applied pulse must be 512 bit long.

Mode 2: level sensitive alternate pattern

(continuous)

The logic state of the signal at the auxiliary

input determines which pattern is output. An

active (TTL high) signal will output pattern B.

Mode 3: output blanking

If alternate pattern mode is not selected, an active

(TTL high) signal at the auxiliary input port forces

(gates) the data to a logic zero at the next 32-bit

boundary in the pattern. The minimum length of

the signal is 100 ns.

Figure 14: Edge sensitive

Figure 15: Level sensitive

Table 6: specifications for auxiliary input

Interface DC coupled, 50 Ω nominal

Levels TTL compatible

Connector SMA female

External error inject input

The external “error inject input” adds a single

error to the data output for each rising edge at the

input.

Table 7: Specifications for error inject input

Interface DC coupled, 50 Ω nominal

Levels TTL compatible

Connector SMA female

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Tel. 07121 / 51 50 50

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