Installation Manual Part 7

FCC ID: CDG-ARTU EXHIBIT C
MAGNASTAR C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM
A brief description oftbe
9.3.3.1 C-2000 MMT Commanded BIT Menu
The MMT Commanded BIT menu screen is shown in Figure 9.3.3,
Commanded BIT selections are as follows:
0) View Results - By pressing zero, it is possible to view the BIT test results after BIT testing has
completed.
I) Full BIT - This command will cause the ARTU to run the Full Built-In-Test that is nonnally run upon
power-up.
2) External TDM Loopback - This command will perform a test to check the transmit driver and the line
receiver of the high speed data bus interface. The transmit outputs (+ and -) must be physically
looped back on the receive inputs in order for this test to pass.
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Figme 9.3.3.1 The MMT Commanded BIT Menu Screen
9.3.3.2 C-2000 MMT RF Test Menu
The MMT RF Test menu screen is shown in Figure 9.3.3.2.
selections are as fo\lows:
A brief description of the Commanded BIT
1) Transmit Continuous Wave - This command will make the ARTU transmit a continuous wave signal.
This command should be used when checking the ARTUs frequency accuracy. The transmitter
output power level of the ARTU will be]O watts (+40 dBm) minimum with zero dB of
programmed attenuation.
The user will be asked to enter the value of attenuation (0-40 dB). Also, the user will be asked
what frequency to transmit on ( subband (1-10) and channel (1-29) or enter "0" for manual entry
with a resolution to 2 kHz).
2) Transmit Random QAM - This command will make the ARTU transmit a modulated 16 QAM signal.
The transmitter output power level of the ARTU will be ] 0 watts (+40 dBm) average power with
zero dB of programmed attenuation. This QAM signal may have peak output power as high as 60
watts
The user will be asked to enter the value of attenuation (0-40 dB). Also, the user will be asked
what frequency to transmit on (subband (]-10) and channel (]-29) or enter "0" for manual entry
with a resolution to 2 kHz).
3) Stop Transmit - This command will cause the ARTU to stop transmitting. It will also disable a receiver
if the receiver has been enabled.
4) Enable TSC Receiver - This command will enable the TSC (voice channel) receiver. The user will be
asked what frequency to tune the receiver (subband (]-]O) and channel (1-29) or enter "0" for
manual entry with a resolution to 2 kHz).
5) Enable Pilot Receiver - This command will enable the Pilot (pilot scanning) receiver. The user will be
asked what frequency to tune the receiver (subband (]-]O) and channel (1-6) or enter "0" for
manual entry with a resolution to 2 kHz).
9-27
RevS