MM102014V1, Rev. G

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5.24 ENGINEERING DISPLAY

Some radios may have access to an engineering display that presents various data related to the radio
system. An example display is shown in Figure 5-7. Typically, this display is accessed by pressing the
button once from the dwell display.
Figure 5-7: Example Engineering Display

5.24.1 Voice and Data Registration Codes

The engineering display’s voice and data registration codes identify the current registered operational
status of the radio on the OpenSky network. Voice registration is granted by the VNIC (Voice Network
Interface Controller) computer and data registration is granted by the MDIS computer. See Table 5-3 and
Table 5-4 respectively.

5.24.2 Transceiver Status

The engineering display’s transceiver status is a plus (“+”) symbol during normal operations. If the radio
is a full-duplex M-803 or a V-TAC, a status of “C” indicates there is a problem with the radio’s RF
combiner.
Voice Registra-
tion Code
(See Table 5-3)
Data Registra-
tion Code
(See Table 5-4)
ization
(“S”=Synchro-
nized)
Status
(See
below.)
Network
Connec-
tivity Icon
Volume
Level Icon
Receive Signal
Strength
Indication
(RSSI)
(Section 5.25)
Control Block
Symbol Error
Rate (CBSER)
(Section 5.26)
RF Synchron- Transceiver