ACCEPTANCE TESTING
5-1-A-5
C0219
LF
OUTPUT
UUT Audio Analyzer
INPUT
➤
Fig. 5-1-A-4 LF output levels test set-up for 0.0005 V
Frequency response
(1) Connect the test equipment as shown in Fig. 5-1-A-2.
(2) Set the UUT to give an LF output of 1 V at 1 kHz on the first modulation
oscillator (refer to 'Level accuracy' above).
(3) Reference this level on the audio analyzer using the dB relative function.
(4) Set the modulation oscillator to the frequencies given in Table 5-1-A-4 measuring
the difference from the reference in (3) above which should be less than 1 dB.
(5) Set the UUT to give an LF output of 1 V at 1 kHz on the second modulation
oscillator (refer to 'Level accuracy' above).
(6) Repeat (3) and (4) above.
Table 5-1-A-4 Test frequencies
Test frequencies
10 Hz 1 kHz ref 70 kHz
30 Hz 10 kHz 100 kHz
100 Hz 30 kHz 300 kHz