TSW200E1
From any of the two screens it is possible to go back to the Mode menu using <F2>
(MENU). To alternate between these screens use <F1> (BACK) and <F4> (NEXT).
The description of the synchronous mode parameters follows. To change these parameters,
place the cursor on the corresponding line and follow the instructions concerning each description.
• Interface: Chooses the test interface as RS232, V.35, V.36, X.21, RS530, G.703–64K or
G.703-2M. Use the ← or → keys.
• Pattern: Determines which pattern will be transmitted and received by the Test Set. The
choice can be done by using the ← or → keys. It is possible to choose among the
following pseudo-aleatory patterns: 2E3-1/ 7, 2E4-1/ 15, 2E5-1/ 31, 2E6-1/ 63, 2E7-1/
127, 127 LA, 127 LD, 2E9-1/ 511, 2E10-1/ 1023, 2E11-1/ 2047, 2E15-1, 2E17-1, 2E18-
1, 2E20-1 O153, 2E20-1 O151, QRSS, 2E21-1, 2E22-1, 2E23-1, 2E25-1, 2E28-1, 2E29-
1, 2E31-1, Mark (‘1111’), Space (‘0000’), ALT M/S (alternating ‘1’ e ‘0’), Double Alt
(‘1100’), 3 in 24, 1 in 16, 1 in 8(1:7), 1 in 4, D4 LA, D4 LD, USER e 7:1 (mark:space).
Other than these standards, there is the AUTO option. If the test is started with this
option the TSW200E1 tries to synchronize automatically to the pseudo-aleatory patterns
that it gets. When the TSW200E1 gets the correct pattern, it starts to transmit this
pattern. There is a limitation concerning the detection of QRSS and 2E20-1 O151
patterns. Since they are very similar, the TSW200E1 units can synchronize in one of
then and begins to count eventual bit errors, it means that the correct pattern is the other
one. The USER pattern can be user edited, bit-by-bit. To do this, select the USER pattern
Wise Telecommunications Industry 22
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