142
2.2.7.5
NXDN™ Test Mode (conventional)
The R8100 NXDN™ Test Package option / NXDN™ Test Mode allows testing of radios compliant with
the NXDN™ radio transmission protocol. NXDN™ radios use a digital transmission format employing
4-Level Frequency Shift Keying (4FSK) modulation in an RF spectrum managed by Frequency Division
Multiple Access (FDMA) technology. Both 9600 bps and 4800 bps transmission rates are supported. The
R8100 NXDN™ mode provides a grouping of test functions compliant with the Conformance Test section
of the NXDN™ Common Air Interface (CAI) standard. These include power, Frequency Error, Symbol
Deviation, Modulation Fidelity (FSK Error), Radio Access Number (RAN), audio/test patterns, and Bit
Error Rate (BER). BER tests require the manufacturer’s Radio Service Software (RSS) to place the radio
in a special test mode. In addition there is an Eye Diagram with graphical representation of the NXDN™
signal and a Voice Loopback function that enables the Voice Loop feature (U.S. patent 5703479) for audio
verification of the radio’s end-to-end operation. Both provide qualitative indication of the radio’s
performance. Averaging can be applied to some measurements by the System Settings. Figure 3.2.8.6-1
shows the R8100 main screen after choosing the NXDN™ Test Mode in Monitor mode.
Figure 3.2.8.6-1
Main screen in Monitor mode after selecting NXDN™ Test Mode
Содержание R8100 SERIES
Страница 19: ...19 Figure 2 1 2 Left and Right Sides of the R8100...
Страница 164: ...164 Figure 2 2 7 7 5 Power Profile Frame with Markers...
Страница 224: ...224 Figure 3 2 9 6 1 Submenu after pressing Options soft key in the Settings menu...
Страница 243: ...243 PTC Test in Monitor Mode Eye Diagram Display...
Страница 244: ...244 Power Profile Display Linear and Circular Constellation Displays...
Страница 245: ...245 Symbol Distribution Plot...