Installation Manual

Lynx NGT-9000
Installation Manual
0040-17001-01 (Revision W) Maintenance Page 4-26
4.4.4 Antenna Coax Ohm Check
Use the following procedure to check the directional antenna (i.e. NY 156 or NY 164) used by TAS or
TCAS function.
The following Ohm check is accomplished by using a typical Ohmmeter and placing one lead on the
center pin and the second lead on the outer shield of the coax.
PORT NAME
DESCRIPTION
TEST RESULT
Sum (Sigma) Port The Sum (Sigma) port is the forward antenna
connector marked with a blue band.
Connected to the NGT-9000 (A4) Sum Port
< 1 ohm
Bit Probe Port The Bit Probe port is the center antenna connector.
Connected to the NGT-9000 (A1) Bit Port.
85 +/- 5 ohms
Difference (Delta) Port Difference (Delta) port is the rear antenna connector
marked with a red band.
Connected to the NGT-9000 (A2) Difference Port.
< 1 ohm
4.4.5 WX-500 Stormscope
Press the Options Icon on the Stormscope screen to access the System Data and Test Modes for the
WX-500.
NOTE
The MPC (MAT) is required to view installation configuration,
environmental information, and fault data. See Installation Checkout
Section (para. 3.9.5).
4.4.5.1 System Data
System Data is viewed on the Settings Screen (see Figure 4-3). This screen shows model information,
software versions, status information, and status. The Settings screen contains data that is only read at
start-up (i.e., the information is not be updated again, unless the power is cycled).
In addition to the system data as the following functions:
• Press the View button to set the View Mode to “120°” and “360°”.
• Press the STAB button to set the Heading Stabilization Mode to “On” or “Off”.
Note - Heading stabilization uses the aircraft heading source as a reference for the display to
maintain the storm display orientation relative to the aircraft. If STAB is turned off, the heading on
the main screen appears as amber dashes (---).
Figure 4-3: WX-500 Settings Screen