Operating instructions

ACCEPTANCE TESTING
5-38
Results table 5-19 Audio voltmeter accuracy
Frequency DVM
reading
(mV)
UUT
coupling
UUT
lower limit
*
(mV) ‡
UUT
upper limit
*
(mV) †
Result
1 kHz 30 AC 25.1 34.9 _______
1 kHz 200 AC 189 211 _______
1 kHz 400 AC 381 419 _______
1 kHz 800 AC 765 835 _______
1 kHz 2000 AC 1917 2083 _______
1 kHz 4500 AC 3317 4683 _______
50 Hz 1000 AC 957 1043 _______
100 Hz 1000 AC 957 1043 _______
500 Hz 1000 AC 957 1043 _______
10 kHz 1000 AC 957 1043 _______
30 kHz 1000 AC 957 1043 _______
50 kHz 1000 AC 957 1043 _______
DC 25000 DC 23997 26003 _______
DC 50000 DC 47997 52003 _______
† The upper and lower limits in the above table are calculated on the assumption that it was possible to set the
exact level. If it is not possible to achieve this, the limits will need to be calculated for the DVM reading
obtained.
Results table 5-20 Distortion & SINAD meter
Distortion/SINAD
set
Lower
limit
Upper
limit
Result
2% 1.4% 2.6 % _______
25% 23.2% 26.8 % _______
12 dB 11.0 dB 13 0 dB _______
Results table 5-21 FM measurement versus carrier frequency (1 kHz rate)
Carrier
frequency
(MHz)
Deviation
(kHz)
IF filter
(kHz)
AF filter Lower
limit (kHz) †
Upper
limit (kHz) †
Result
5.5 20 30 0.3 to 3.4 18.8 21.2 _______
500 20 30 0.3 to 3.4 18.8 21.2 _______
1000 20 30 0.3 to 3.4 18.8 21.2 _______