Tektronix 071-0590-00 user manual Synchronization Lock Threshold, Synchronization Threshold

Reference

Synchronization (LOCK) Threshold

The current synchronization threshold depends on pattern, and the setup of the

SYNC Menu, as summarized in the table below:

Table 3-5. Synchronization Threshold

Pattern Type		Threshold	How to Set
PRBS	1,024 errors in 4,096 bits		Fixed
	(BER = 2.5 E-01)
All WORD patterns (up to 16	128 errors in 4,096 bits		Fixed
bits) when 1-Mbit Option not	(BER = 3.1 E-02)
installed.
All WORD, mark density, or	Based on 256 errors in a rolling		Use SYNC Menu to select
other ROM patterns with 1-Mbit	window of x bits. Nine BER levels		a synchronization level from
Option installed.	available:		1 to 9.
	1:	3.1 E-02
	2:	7.8 E-03
	3:	1.9 E-04
	4:	9.7E-04
	5:	4.8 E-04
	6:	2.4 E-04
	7:	1.2 E-04
	8:	6.1 E-05
	9:	3.0 E-05

You can change the synchronization threshold for (long) WORD, mark density, and ROM patterns using the SYNC Menu as follows:

Procedure to Set SYNC Threshold

1.Press the F1 key to enter the Menu system.

2.Press F4 key to enter the WORD submenu.

3.Press the F1 key (MORE) until the SYNC option appears.

4.Press F2 (SYNC).

5.Use the pattern up/down keys to select a synchronization threshold level from 1 to 9.

6.When done, press F4 to enter your choice.

7.Press F1 multiple times until you have exited the Menu system.

NOTE: See later in this chapter for a further explanation of the SYNC Menu.

3-22 GB1400 User Manual