Keysight E6961A, User Manual And Method Of Implementation

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Overview 1
Keysight E6961A User Guide and Method of Implementation 31
Test Mode 3. SLAVE Transmit Clock Frequency and Jitter Tests
Test Setup
This test may be run using either a differential output or single-ended output from
the transmitter (MDI). Alternatively, this test can also be run using the TX_TCLK.
Refer to “General Test Setup” on page 14 for connection details.
Specification References
[1]
BroadR-Reach Physical Layer Transceiver Specification, v3.2, Section 5.4.5.
[2]
BroadR-Reach Physical Layer Transceiver Specification, v3.2, Section 5.2.
[3]
BroadR-Reach Physical Layer Transceiver Specification, v3.2, Section 5.4.3.
Transmit Clock Frequency (SLAVE) Test Information
Reference [1] specifies the symbol transmission rate of a compliant PHY. The
symbol transmission rate of the MASTER PHY shall be within the range if 66 2/3
MHz ±100 ppm.
The specification does not specify the conformance limit for a PHY that is
operating in SLAVE mode, but the SLAVE is supposed to have a symbol clock rate
that is equal to the MASTER PHY.
Reference
[2] specifies that Test Mode 3 shall transmit the data symbol sequence
{+1,-1} repeatedly on the channel. The transmitter shall time the transmitted
symbols from a symbol rate clock in the SLAVE timing mode.
Alternatively, an external TX_TCLK could be used to measure the frequency.
NOTE
Use the software supplied with your transmitter PHY to control the Device Under
Test.