Wise Telecommunications Industry
5
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QAM Measurements
Coding: ITU J.83 Annex A (DVB-C); ITU J.83 Annex C
Modulation types: Annex A: QAM 64, 128, 256; Annex C: QAM
64, 128, 256
MER Display range: 21 to >39 dB (QAM 64); 24 to >39 dB (QAM
128); 28
a >39 dB (QAM 256)
MER Resolution: 0,1 dB
BER Pre-FEC minimum: e
-3
to e
-9
BER Post-FEC minimum: e
-3
to e
-9
Voltmeter
- Voltage: 1 Vdc until 100 Vdc.
2. Characteristics
2.1 Keyboard
Figure 2.1: TSW500CATV Keyboard.
The TSW500CATV keyboard has a key diversity to facilitate your operation:
Power Button;
Go to the main menu;
Function of these keys dependent on the screen displayed. The label
displayed in the lower line, right above the keys; defines these functions;
Begins the test, select the desired test/mode;
Return to the previously screen;
Used for navigating the cursors on the screen and changing the option pointed to by
the cursor.
