Wulfsberg Electronics Division NPX136D 用户手册
SMtbd Rev. 0.01
NPX136D Panel Mount Radio Manual
Apr 23, 2004
Page 2-5
ENG-FORM: 805-0104.DOT
PROPRIETARY AND CONFIDENTIAL TO NORTHERN AIRBORNE TECHNOLOGY LTD.
2.3.7.2
Power On Checks
a)
Install the NPX136D and power up the ship’s systems. Turn on the radio. Check
the operation of all front panel controls. Adjust brightness and volume levels as
required.
the operation of all front panel controls. Adjust brightness and volume levels as
required.
b)
Check all transmit and receive functions. Ensure the RX/TX status indicator lights
green when the radio is keyed to transmit and amber when receiving.
green when the radio is keyed to transmit and amber when receiving.
c)
Check the SCAN function. Note: you may be unable to hear the received audio
if the tones do not match those set in the radio. To avoid any confusion, tones
should be set to OFF (via the settings menu) before scanning so that all channels
will be heard.
if the tones do not match those set in the radio. To avoid any confusion, tones
should be set to OFF (via the settings menu) before scanning so that all channels
will be heard.
d)
Check the antenna feedline at the R/T with a through-line wattmeter and suitable
frequency elements to ensure correct antenna matching. Reflected power in excess
of 25% represents a serious problem, and should be investigated carefully, or
serious RFI and system interference as well as possible radio damage may result.
A VSWR measurement over 3.0:1 represents a significant loss in signal power to
the antenna. Check that forward power is to specifications over the frequency band
of the radio.
frequency elements to ensure correct antenna matching. Reflected power in excess
of 25% represents a serious problem, and should be investigated carefully, or
serious RFI and system interference as well as possible radio damage may result.
A VSWR measurement over 3.0:1 represents a significant loss in signal power to
the antenna. Check that forward power is to specifications over the frequency band
of the radio.
2.3.8
Post Installation EMI Test
The purpose of this test is to identify any interference that the NPX136D may cause with
existing aircraft systems. The NPX136D should be tested in accordance with the
Installation Approval Test Procedure (see section 2.5), and the test results documented on
the record sheets.
existing aircraft systems. The NPX136D should be tested in accordance with the
Installation Approval Test Procedure (see section 2.5), and the test results documented on
the record sheets.
2.4
Continued Airworthiness
Maintenance of the NPX136D is ‘on condition’ only. Periodic maintenance of these
products is not required.
products is not required.
2.5
Installation Drawings
DRAWING
REV.
DESCRIPTION
TYPE
NPX136D\403-0
1.00
Panel Mount Radio
Interconnect
NPX136D\403-1
1.00
Panel Mount Radio
Interconnect
NPX136D \405-0
1.00
Panel Mount Radio
Connector Map
NPX136D\905-0
1.00
Panel Mount Radio
Faceplate
NPX136D\922-0
1.00
Panel Mount Radio
Mechanical
NPX136D\634-0
1.00
Post Installation EMI Test
Installation Approval Test Procedure
Section 2.0 ends after these Drawings