Park Air Systems 6525, User Documentation

Page: 52 / 54

31-3MDR00HB Page 52 Maintenance
Draft
Initiating an Interruptive BIT Test
An interruptive BIT test is available only in AM-Voice and AM analogue ACARS modes.
Use the following procedure to initiate an interruptive BIT test from the MDR's front panel. A BIT test
cannot be initiated while the MDR is keyed.
During an interruptive BIT test, the MDR radiates modulated carrier waves at the set power.
Users should therefore obtain the necessary authority before initiating a test.
If the test is to be carried out with the antenna disconnected, ensure a load is fitted to the
MDR's Antenna connector.
In order to test the line input stages, an internally generated 1 kHz tone is injected into the
line input circuit. Any other audio present on the line input will cause the test to be
inaccurate. Therefore the MDR must not be keyed during the test.
F r e q u e n c y
C h a n n e l
S e t t i n g s
E x i t > >
Control Screen (Page 1)
B I T
S / W C o n f i g
E x i t < <
Control Screen (Page 2)
B I T I n i t i a t e
E T I 0 0 0 1 0 1 : 3 6 h r s
S u p p l y 2 5 v
E x i t > >
BIT Screen
(1) From the Main screen, press the switch
to display the Control screen. Turn the
switch until BIT is highlighted. Press the
switch.
(2) Ensure the BIT screen is displayed.
Turn the switch until BIT Initiate is
highlighted. Press the switch.
(continued)