Installation Manual Part 2

FCC ID: CDG-ARTU
MAGNASTAR
EXHIBITC
C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM
6.3.11 ARTU TRANSMITTER POWER OUTPUT MEASUREMENT
These test steps will measure the ARTU transmitter power level at the Antenna port of the
Duplexer. The installer will be required to disconnect the Antenna coaxial cable from the Antenna
port of the Duplexer and insert a power meter or thru-line watt meter between this port and the
antenna. Be sure to have either a 50 ohm RF load or antenna connected to the thru-line watt
meter. The ARTU will then be commanded to transmit a CW carrier for measurement. It is very
important that the installer properly protect the test equipment from damage by the ARTU
transmitter output which can have an average power level as high as +42 dBm (16 watts). After
the power measurement is completed. the ARTU will be commanded to stop transmitting and the
Antenna coaxial cable is to be reconnected.
The MMT display screen should be as shown in Figure 6-10.
The installer is to disconnect the Antenna coaxial cable from the Antenna port of
the Duplexer. A Power Meter is to then to be connected to the Antenna port of the
Duplexer. If a thru-line watt meter is used, be sure to reconnect the antenna to the
output terminal of the thru-line.
CAUTION: PRESSING "c" WILL MAKE THE ARTU TRANSMIT. THIS PRESENTS A
RADIATION HAZARD FOR PERSONNEL WITHIN 5 FOOT OF THE ANTENNA.
ENSURE THAT THE LOOP-AROUND TEST SET IS SET UP AND CONNECTED
PRIOR TO INITIATING THE TEST SEQUENCE. The Power Meter, with or without
padding, shall be capable of withstanding average power levels as high as +42 dBm (16
watts) without damage.
Once the Power Meter is connected to the Duplexer, the installer is ready to
command the ARTU to transmit. Type "C" to command the ARTU to start
transmitting.
Note: Execution of this command may take from ten to thirty seconds to complete during
which time the MMT may appear to be stopped or several command screens may appear
to flash by and momentarily stop before the test is configured in the MMT.
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: C-2OOO r.port. ~.x-iDG t..t PAR ~OL ~rf~. :
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+ ~ MMT Tutorial +
: ms~O8 ~ D8AS'l'U mftALLl.tlI~ :
: 08JKC'1'IV8: :
: .r~ to -.ur. Aa'rO'. ~tPlt po-.r OD po-.r _t.r. :
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: BDBC'l'BD USULTS: :
: .~ -ter ~ct~ to dupl_.r in pr.paratiOD to -a~ ~r ~tPI&t. :
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:ACTI~S: :
: 0 Di.coaaect aut8DD& cable fro. 4upl_er. :
: 0 Coaaect BP ~r _ter to 4upl.-r. :
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: Bot.: pzo_.iag 'C'ODtinU. - will caus. th. radio to begin t~ttiDG. :
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: (C)oatiau.. (tI)roubl..hoot. (R)epeat. (Q)uit: - :
+ +
Figure 6-10. MMT Installer display screen #10.
6--12 RevB