5-2
GTX 327 MAINTENANCE MANUAL
Rev B
190-00187-05
5.4
TEST EQUIPMENT PRECAUTION
Except for the DVM with standard lead length, the case of each instrument should be connected to ground. The
bench power supply ground must be connected to earth ground and serve as a single point ground for the entire
test setup.
NOTE
Test harness misconnection could cause damage to the GTX 327 unit.
5.5
REQUIRED TEST EQUIPMENT
The following test equipment (or suitable substitute) is required for testing the GTX 327:
Test Equipment Description
Representative Type
Transponder Test Set
IFR Systems ATC-1400A
Power Supply
Topward 2000 (+11 Vdc to +33 Vdc @ up to
3 amps if testing Switched Power Output)
Digital Multimeter
Fluke Model 79
Oscilloscope: 100 MHz Bandwidth
Minimum
Tek TDS-3034 or suitable equivalent
Test Harness
Fabricated Locally (See Section 2)
Coax Cable Assembly
Fabricated Locally (See Section 2)
5.5.1
TEST HARNESS
Section 2, SPECIAL TEST EQUIPMENT, provides a schematic diagram in Figure 2-3 for fabricating a
suggested test harness. Instructions are also given in Figure 2-1 for assembling the blindmate connector on the
Coax Cable Assembly. The Coax Cable Assembly is included as part of the test harness shown in Figure 2-3.
5.6
BENCH TESTING
Unless otherwise specified, this test is performed manually with covers in place.
5.7
TEST EQUIPMENT SETUP
Connect the GTX 327 and related test equipment to the test panel as shown in figure 2-3. Set the controls on the
ATC-1400A to the default settings. Refer to ATC-1400A Test Setup for complete Standard Test Conditions
details. Attach the coax cable calibrated for 1.5 dB maximum attenuation at 1090 MHz with appropriate RF
connectors.
The document reference is online, please check the correspondence between the online documentation and the printed version.
