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Texas Instruments SLLU039B User Manual

Page 22

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Test Results

2-6

Test Setup

signal on TP1, R2 is shorted. Type-2 behavior is again observed on the
SN65MLVD207 receiver output.

Trace three shows the differential voltage on the bus. Note that the bus volt-
ages are nominal M-LVDS levels of 1.1 V

PP

due to the lower load seen by the

current driver.

Figure 2−5. Parallel Terminated Point-to-Point Parallel Simplex Typical Eye Pattern Data

Driver

Input

Receiver

Output

Differential

Bus

Voltage

Figure 2−6 represents the two-node multipoint transmission eye patterns
where trace 1 is the input signal applied to J2, and traces 2 and 3 are the output
signals seen at TP1 and TP3 respectively with R2 and R13 shorted. The offset
zero-crossing shows the difference between Type−2 (Receiver #1 Output) and
Type−1 (Receiver #2 Output).

Figure 2−6. Two-Node Multipoint Typical Eye Pattern Data

Driver

Input

Receiver #1

Output

Receiver #2

Output