Start / Stop Error Detection; Specify The Pattern Of The Input Signal; Invert The Polarity Of The Test Pattern - Quantifi Photonics BERT 1005 Series User Manual

8.3.2

Start / Stop error detection

The error detection for a channel can be started or stopped at any time, by clicking the START / STOP
buttons under the corresponding channel section.
The receiver of the error detector has a limiting amplifier to protect sensitive electronics. The
front-end amplifier may clamp the receiver inputs.
8.3.3

Specify the pattern of the input signal

To set the test pattern of the input signal, select the pattern from the PATTERN drop-down list.
All the PRBS patterns have an odd length of 2^n-1 bits, where 'n' = 7,9,10,11,15,23 and 31.
8.3.4

Invert the polarity of the test pattern

The polarity of the test pattern can be inverted at the ED input level by toggling the INVERT button. Test
pattern inversion can only be implemented before the ED is enabled. While test pattern inversion is
enabled, the color of the toggle button will be green.
Quantifi Photonics Ltd. Version 2.04
Bit Error Rate Tester | BERT 1005
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