Table of Contents
Advertisement
5
HS Tests
Connection Diagram
Parameters
184
informative). In this spec, the test is performed twice at each gear, once for
the positive Frequency Offset (+2000 ppm) and once for the negative
Frequency Offset (-2000 ppm).
Three separate common-mode amplitude cases are tested. First, a
nominal amplitude of 180mV, second the minimum TX value of 80mV and
third, the maximum Tx value of 260mV. These compliance values can be
modified in Expert Mode with the Common-Mode Voltage Levels
parameter.
For each given jitter frequency the BER is measured and compared with
the Target BER. Up to Gear 3 the Target BER is 10
-12
Target BER is 10
.
If the 'Perform Jitter Limit Test' property is set to true, the value of SJ is
increased until errors are found. The procedure performs a binary search
for finding the maximum tolerated value and 'Jitter Increase Accuracy'
defines the size of the window.
Refer to the connection diagrams shown in the Connection Diagram
section of the Test 2.1.2-HS-RX Accumulated Differential Input Voltage
Tolerance Test test.
The parameters used in Expert Mode for this test, are as follows:
•
Lane Under Test Termination Model
•
CDR Loop Bandwidth (if CDR is selected in the Special Parameter
dialog, see
"BERT Analyzer
•
CDR Peaking (if CDR is selected in the Special Parameter dialog, see
"BERT Analyzer
Settings")
•
CDR Transition Density (if CDR is selected in the Special Parameter
dialog, see
"BERT Analyzer Settings"
•
CDR Loop Order (if CDR is selected in the Special Parameter dialog,
see
"BERT Analyzer
•
Target BER
•
IBerReader Init Mode
•
Test Sequence
•
Re-Init sequence after Reset DUT
•
HS-Prepare length
•
HS-Sync length
Settings")
Settings")
Keysight N5990A MIPI M-PHY Receiver Test User Guide
-10
and for Gear 4, the
Advertisement
Chapters
Table of Contents
