COMPONENT MAINTENANCE MANUAL
1152682
Page 107
Oct 27/06
© Honeywell International Inc. Do not copy without express permission of Honeywell.
23-24-02
2
With the test setup of Test # 1, set the spectrum analyzer center frequency for
121.5 MHz and the frequency span to 0 MHz; the required audio tone shall be
audible from the speaker on the spectrum analyzer. If no speaker is included
within the spectrum analyzer, connect an external speaker to the spectrum
analyzer video output port.
3
Place the switch on the transmitter unit back to the OFF position.
(4)
406.028 MHz Power Output, Test # 4
(a)
Equipment Required
1
HP 8590 spectrum analyzer (or equivalent)
2
30 dBm attenuator
(b)
Test Procedures
1
Connect the transmitter unit to the spectrum analyzer using a co-axial cable
(preferably low-loss) of known db loss and place the 30 dBm attenuator in
between so that the power rating of the spectrum analyzer is not exceeded,
resulting in damage to the equipment.
2
Set the spectrum analyzer as follows:
•
Center Frequency: 406.028 MHz
•
Span: 1 MHz
•
Resolution Bandwidth: 100 kHz
•
Video Bandwidth: 100 kHz
•
Sweep Rate: 50 ms
•
Max Hold A: On
•
Reference Level: 10 dBm
3
Activate the transmitter unit by moving the switch on the transmitter unit from
the OFF position to the TX position.
4
Capture the 406.028 MHz signal on the analyzer, use the PEAK SEARCH to
locate the spectral peak and read the displayed amplitude on the analyzer
screen. Determine the actual 406.028 MHz signal power output by adding the
following together:
•
the amplitude measured on the analyzer
•
the 30 dBm loss of the attenuator
•
the previously measured loss of the coaxial cable(s)
•
the Spectrum Analyzer Correction Factor for this frequency
a
The Spectrum Analyzer Correction Factor can be found on a label
attached to the spectrum analyzer. If no such label is found, refer to
Section 4 of RESCU 406 AF User Guide and Reference Manual 6C-520,
to determine the correction factors.