TB 9-6625-1947-35
(10) Repeat technique of (5) through (8) above with resistance standard set to 300 Ω
and press IMPEDANCE 600 BAL pushbutton. Sum of multimeter readings will be
between 2.424 and 2.474 V rms.
b. Adjustments. No further adjustments can be made.
11. Distortion
a. Performance Check
(1) Connect audio analyzer or spectrum analyzer to TI UNBAL output connector,
using a 50 Ω feed-through termination.
(2) Position controls as listed in (a) through (d) below:
(a) FREQUENCY RANGE switch to X10.
(b) FREQUENCY dial to 1.
(c) OUTPUT LEVEL dBm switch to +10.
(d) Press IMPEDANCE 50 Ω UNBAL pushbutton.
(3) Adjust AMPLITUDE control for a +1 dBm indication on TI meter. If measured
distortion is not greater than 40 dB below the fundamental frequency, perform b below.
(4) Repeat technique of (2) and (3) above at FREQUENCY RANGE switch and
dB below fundamental frequency.
Test instrument
FREQUENCY RANGE
FREQUENCY
switch settings
dial settings
X10
5
X10
10
X100
1
X100
10
X1K
10
X10K
1
X10K
2
X100K
1
X100K
5
X100K1
10
X1M
10
X1M
5
X1M
1
1Replace
audio analyzer with spectrum analyzer and measured distortion
will be greater than 34 dB below fundamental frequency.
to 500 kHz) and at least -34 dB (1 to 10 MHz) below fundamental FREQUENCY (R).
