190-00133-02 Rev B 3-10
3.3.3.11 IDENT Test
1. Set the ATC-1400A to Mode
A
.
2. Turn the GTX 320 mode select knob to the
ON
position.
3. Set the RF level on the ATC-1400A for a 100% reply rate.
4. Press the
IDENT
button on the transponder. The unit shall cause the ATC-1400A XPDR Code display to read
1d0000 for approximately 20 seconds. The SPI pulse shall appear next to the P3 pulse on the oscilloscope. See
Figure 3-5.
5. Rotate the mode select switch to the
SBY
position.
6. Press the
IDENT
button on the transponder. The reply light shall turn on for approximately 25 seconds, but
the unit shall not transmit.
______ OK
Figure 3-5. P1, P3, and SPI Pulses
3.3.3.12 Front Panel Test - OFF
Set the transponder mode select switch to the
OFF
position. Only the OFF nomenclature shall be illuminated,
and all other panel lighting shall not be illuminated. The units internal power supplies shall all be off.
______ OK
