-84-
ڦ
Pattern
Select the test pattern data to be sent/received.
Name
Content
63
2
6
-1 (Generator polynomial X
6
+ X + 1)
Random code
511
2
9
-1(Generator polynomial X
9
+ X
4
+ 1)
Random code
2047
2
11
-1 (Generator polynomial X
11
+X
2
+ 1)
Random code
Mark
All 1
Space
All 0
ALT
10..
D B L -
ALT
0011..
3 in 24
010001000000000000000100..
1 in 16
1000000000000000..
1 in 8
10000000..
1 in 4
1000..
ڦ
Flow control
If checked, RTS-CTS flow control is enabled. When this unit is DTE, the test pattern is sent only when CTS
is active, and when this unit is DCE, the test pattern is sent only when RTS is active.
If unchecked, the test pattern will be sent regardless of the state of the RTS-CTS control lines.
5.2 Start and Stop
When you press [RUN], it starts to transmit the test pattern and compares the received data and the test pattern. Ini-
tially, until the initial pattern of the test pattern is received and synchronization is established, “Sync. search” mes
-
sage is displayed. After synchronization is established, “Measuring” message is displayed and error rate measure
-
ment starts.
When using the RS-232C port, simultaneously with the start of test pattern transmission, when it is set to DTE the
RTS and DTR signals are activated, and when it is set to DCE the CTS, DSR, and DCD signals are activated. When
using the TTL port, only RTS is active.
When the test mode is set to “Repetitiously”, the start time and measurement elapsed time of each measurement are
displayed in “year/month/day/hour/minute”.
The following operations are available during measurement.
“Error[1]”
Inserts a 1-bit error in the test pattern.
You can also insert it by [0].
“Error[5]”
Inserts a 5-bit error in the test pattern.
You can also insert it by [1].
“Pause disp
.
”
Pauses the display update. Touch again to restart
the displaying. You can also pause it by [ESC].
“Measure” It finishes only the error rate measurement while it
keeps transmitting the test pattern. Touch again to
start a new measurement.
