Tx Line Code Leds (Quickbert-T1 Only); Frame Leds; Low Battery Led - Fluke 635 User Manual

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Users Manual
expected customer payload, can provide an accurate estimate of the actual in-
service network performance.
The QuickBERT-T1 and QuickCHECK-T1 have the ability to obtain pattern
sync with the following patterns: QRSS, 1 IN 7, 2 IN 8, 3 IN 24, ALL ZEROS,
ALL ONES, 1:1, NET55, OCT55, and DALY55. (The QuickBERT-T1 can
also obtain pattern sync with a customizable USER pattern.) When the test set
obtains pattern sync, a green Pattern LED will illuminate to indicate which
pattern is being received. See section 2-43 for detailed descriptions of the
individual patterns.
With the QuickBERT-T1, a pattern can be selected using the TX PATTERN
key. The pattern selected for transmit is indicated by the yellow Pattern LEDs.
Selecting a new transmit pattern will not necessarily affect the pattern being
detected at the receiver (indicated by the green pattern LEDs).

2-78. Tx Line Code LEDs (QuickBERT-T1 only)

The TX LINE CODE key is used to select the line code that the QuickBERT-
T1 will use in transmitting the selected pattern. If the AMI selection is made,
the QuickBERT-T1 will allow any amount of zeros to be transmitted. If the
B8ZS selection is made, a B8ZS substitution will be made for a string of 8
consecutive zero bits in the pattern. The yellow LED corresponding to the
chosen line code will illuminate. Changing the line code selection will not
necessarily affect the line coding being detected at the receiver (green LED).

2-79. Frame LEDs

The QuickBERT-T1 and QuickCHECK-T1 have the ability to detect NONE,
D4, ESF, and SLC96 framing. If any of these frame formats are detected by the
Rx T1 receiver, the corresponding green LED illuminates. Otherwise, they will
remain off.
When transmitting (QuickBERT-T1 only), choose the frame format by using
the TX FRAME key. The QuickBERT-T1 will frame the selected pattern
according to the selection indicated by the yellow LEDs. Changing the
transmit frame format selection will not affect the receiver.

2-80. Low Battery LED

This LED illuminates to indicate that the battery life is nearly exhausted and
that the battery should be recharged.
2-28