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Keysight N5990A MIPI M-PHY Receiver Test User Guide
6
Squelch Tests
Test 2.4.6-SQ-RX Squelch Noise Pulse Spacing (T
SPACE-SQ
)
It is available for all hardware configurations.
Figure 139
Test 2.4.6-SQ-RX Squelch Noise Pulse Spacing Test
Purpose
It verifies that the DUT does not exit squelch upon detection of appropriate
Squelch Noise Pulses with spacing (T
SPACE-SQ
).
Procedure
The data generator sends a test sequence consisting of a burst of DIFN
pulses among the DIFP states, which start with a pulse distance less than
the minimum squelch pulse distance. The pulse distance increases
stepwise until the DUT exits the hibernate state and enters into the sleep
state.
When using loopback, the hibernate state exit is found by detecting that
the DUT has activated the loopback mode and sent the test pattern back
via the TX. The test pattern must contain a configuration block starting
with the macros
SQUELCH()
.
Summary of Contents for N5990A
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