™
Connecting the RX Coaxial Cable to the RTU and the NIU
Warning!
The RX cable carries DC power which under some circumstances is
sufficient to cause injury. Stay in back of the transmitter antenna when the
transmitter is connected to limit body exposure to RF radiation.
Attention
Never connect the RX cable to the TX port or the TX cable to the RX port.
The DC power in RX cable could damage the RTU electronics if connected
to the TX port.
1.
Disconnect power to the NIU.
2.
Connect the RX coaxial cable to the RX port on the RTU. Use a torque of 271 N-cm (24 in-lbs)
Note:
Do not connect the TX cable at this time.
Electronic Alignment of the RTU Antenna
1.
The NIU should be installed and powered up before final alignment of the RTU. Refer to the NIU Product
Information Primer (PIP).
2.
Disconnect the connector cap from the AGC port (see
3.
Connect the DVM to the AGC port using the AGC test port cable (see
).
4.
Verify that the RX cable from the NIU is connected to the RTU.
5.
Connect the red lead (signal) banana plug from the AGC port to the (+) DVM jack, and the black lead (shield)
banana plug to the (–) DVM jack.
Note:
The measured value should be between 1 V and 5 V DC.
Figure 7. Elevation and Azimuth Adjustment with DVM
+
-
AGC port
DVM
Red
Black
Connector Cap
