Operating instructions

ACCEPTANCE TESTING
5-2 46882-311D
Fig. 5-14 Audio oscilloscope check ......................................................................................... 5-18
Fig. 5-15 Modulation meter FM............................................................................................... 5-20
Fig. 5-16 Modulation analyzer - AM........................................................................................ 5-23
Fig. 5-17 RF frequency meter................................................................................................... 5-24
Fig. 5-18 RF spectrum analyzer checks.................................................................................... 5-26
Fig. 5-19 RF broad band power meter checks.......................................................................... 5-28
Introduction
Test procedures described in this chapter may be simplified and of restricted range compared with
those that relate to the generally more comprehensive factory test facilities which are necessary to
demonstrate complete compliance with the specifications.
Performance limits quoted are for guidance and should not be taken as guaranteed performance
specifications unless they are also quoted in the section Performance data in Chapter 1.
When making tests to verify that the instrument meets the stated performance limits, always allow
for the uncertainty of the test equipment.
Results tables
A set of Results tables, each with a blank results column, is provided at the end of this chapter. It
is suggested that these tables are copied, and the test results entered on the copies.
The Results table that is appropriate to each particular test or part of a test is referred to at the
relevant point in the test procedure.
Before starting
In line with best practice in electronic measurement, it is recommended that the Unit Under Test
(UUT) is allowed to stabilize for thirty minutes after switch on to obtain optimum performance.
The key presses necessary to set UUT parameters may differ slightly from those stated in the text,
depending on the version of software fitted.
To minimise the number of key presses that the user needs to make to obtain the correct instrument
settings, each section assumes that the instrument is being configured from the instrument ‘factory
default power on state’. To ensure that this occurs, initially press the following keys:
[HELP/SETUP], [Setup], [Setup page 2], toggle [Power Up From], until Preset Store 1 is shown
highlighted in inverse video. Each time the instrument is now powered up, it will enter its default
power on state.
The instructions relating to test equipment operation assume that the test equipment used for each
test is that suggested in the Example column of the following table (where there is more than one,
the first item).