Transmitter:
For each frame transmitted, BB_Credit_CNT is incremented by 1.
Receiver:
The value is decremented by 1 for each R_RDY Primitive Signal received from the other port.
Clock offset (ppm)
(16G only)
: The frequency may be offset in parts per million at +/- 150ppm.
Fiber Channel - Measurement Setup
On the
Measurement
tab, select from the following options to setup your FC measurements:
Mode
: Manual or Timed
Manual:
Measurement is started (by the User) by pressing the
Start
button and ended when pressing the
Stop
button.
Timed:
Measurement duration can be programmed in seconds, minutes, hours or days.
Event Log
: Circular or Blocked. When set to Circular, log events may be overwritten with the latest events if the circular buffer
fills up. The oldest event will be deleted so that the new event can be added. When set to Blocked, the log will not be
overwritten when buffer is full and the latest events will not be logged.
TX Start:
Separated or Coupled. Configures how the measurements are started when in BERT and Multiple Streams test
modes.
Separate:
Independent control (Start/Stop) of the transmitter is enabled. At the start of the test only the receiver is
turned on -- the user must start the transmitter manually.
Coupled:
Transmitter and receiver are turned on at the same time, and the Tx and Rx measurements start at the same
time at the start of the test.
14.2 BERT/Throughput
14.2.1 Overview
The test set complies with ANSI NCITS FC-FS recommendations and has the ability to test 1, 2, 4, 8 and 10, and 16 Gigabit Fibre
Channel.
1/2/4/8G Fiber Channel: The unit verifies the 8B/10B PCS Layer with a basic primitive set at FC-1 or FC-2 lower layers.
10G Fiber Channel: The unit verifies the 64B/66B PCS Layer with a basic primitive set at FC-1 or FC-2 lower layers.
FC-1 Layer addresses the transmission protocol encoding, decoding, and special characters used for protocol
management
FC-2 is the signaling protocol layer, which is made up of a framing protocol and a flow control process
16G Fiber Channel: The unit verifies the 64B/66B PCS Layer with a basic primitive set at FC-1 or FC-2 BERT lower layers.
The unit supports the generation and monitoring of: bit errors, order sets, frame delimiters, frame transmission, and generation of
primitive sequences. BERT diagnostics perform a bit-by-bit comparison to find bit errors in the received data pattern. Error Count and
Error Rate for the latest sample are displayed and maintained, as well as totals for all samples from the test start.
The user can use a default frame header or define a custom frame header - the unit takes care of the frame/header setup, creates the
user defined SOF and EOF delimiters and calculates the CRC error checking bytes, which are placed within the frame. User defined
bytes, fixed patterns or industry standard PRBS patterns can be selected from drop-down menus and radio buttons and inserted into
the payload field.
Testing is supplemented with the capability to perform Bit and CRC error insertion. These tests allow users to test their own Mux
demux equipment for error monitoring and detection. The test set displays the BERT test results continuously and any anomaly is
RXT-3900 e-Manual D07-00-111P Rev A00
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