ACCEPTANCE TESTING
5-1-11
LF OUTPUT
SPECIFICATION
Level accuracy:
±
5% for levels above 50 mV
±
10% for levels from 500
μ
V to 50 mV
(With a load impedance >10 k
Ω
)
Frequency response:
Typically better than 1 dB from 0.1 Hz to 300 kHz
TEST EQUIPMENT
Description Minimum
specification
Example
Digital multimeter
DC to 300 kHz, 1 mV to 5 V
Datron 1061A
Audio analyzer
Capable of measuring 0.5 mV
±
3% and
levels at 10 Hz
Rohde & Schwarz
UPA3
TEST PROCEDURES
Level accuracy
Fig. 5-1-6 Level accuracy test set-up
(1)
Connect the test equipment as shown in Fig. 5-1-6.
(2)
Set the UUT to give an LF output of 5 V at 1 kHz as follows:
[LF]
[LF Gen]
[LF Freq]
1 kHz
[LF Level]
5 V
(3)
The level measured on the digital multimeter should read 5 V
±
0.25 V.
(4)
Check the LF output of the UUT at the levels indicated in Table 5-1-7. Check that
the measured levels are within specification.
TABLE 5-1-7 LEVEL ACCURACY OUTPUT LEVELS
LF output levels (V)
5.0000
0.1000
0.0050
2.0000
0.0500
0.0020
1.0000
0.0200
0.0010
0.5000
0.0100
*0.0005
0.2000
*For the last measurement it will be necessary to use the audio analyzer. Connect the test
equipment as shown in Fig. 5-1-5.
C0220
LF
OUTPUT
UUT
Digital Multimeter
INPUT
➤
