OPTION 006 Avionics
Annex-B-28
ACCEPTANCE TESTING
Introduction
The test procedures in this section enable you to verify that the electrical performance of
the avionics signal generator complies with the Performance Data given earlier. The test
equipment recommended for this purpose is listed in Table B-1. All tests may be performed with
the covers in place and are intended to be carried out in the order given. For convenience, the
test equipment and specification for each test are summarized before the test procedure. These
tests are in addition to those for non-avionics versions of the instrument.
These acceptance tests give a high degree of confidence that the instrument meets its
specification, without the use of specialised test equipment.
The avionics option uses a method of Direct Digital Synthesis (DDS) to generate the
required avionics waveforms. The accuracy of the generated waveform is therefore determined
by stored digital data and the AM performance of the signal generator. These tests check the
waveform generation and analogue and RF signal paths in the signal generator. Additional tests
can be undertaken using specialised ILS and VOR receivers if they are available.
Test equipment
The test equipment recommended for acceptance testing is shown in Table B-1.
Alternative equipment may be used provided it complies with the stated minimum specification.
Table B-1 Recommended test equipment
TEST EQUIPMENT
Description Minimum specification Example
Spectrum analyzer DC to 400 MHz IFR 2382
Level accuracy ±1 dB
Modulation meter 500 kHz to 1 GHz IFR 2305
AM accuracy ±1% of reading
Selectable ILS filter
Oscilloscope 100 MHz bandwidth Tektronix 2235
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