TB 9-6625-2330-35
b. Adjustments. No adjustments can be made.
a. Performance Check
(1) Connect TI MODULATION IN/OUT to audio analyzer INPUT HIGH.
(2) Press TI pushbuttons as listed in (a) through (e) below:
(a)
FUNCTION-RF ON to off (red light extinguished).
(b)
MODULATION/AUX-MOD SOURCE DISP to SOURCE ONE.
(c)
FUNCTION-MOD FREQ.
(d)
DATA ENTRY- 1 kHz
(e)
MODULATION/AUX-MOD ON ONE (red light lit).
(3) Set audio analyzer to measure distortion. Audio analyzer distortion indication
Audio analyzer
Test instrument
distortion indications
MOD FREQ
(%)
frequency
1
kHz
< 0.2
(4) Disconnect TI MODULATION IN/OUT from audio analyzer INPUT HIGH.
(5) Connect TI MODULATION IN/OUT to audio analyzer INPUT HIGH using 50 Ω
feedthrough termination.
(6) Set audio analyzer to measure level. Audio analyzer indication will be within
Test instrument
Audio analyzer level indication
DATA ENTRY
(V rms)
mod frequency
setting
Min
Max
1 kHz
0.950
1.050
(7) Disconnect TI MODULATION IN/OUT from audio analyzer INPUT HIGH.
(8) Connect TI MODULATION IN/OUT to frequency counter A input.
(9) Set up frequency counter controls to measure frequency with 50 Ω input.
(10) Set TI FUNCTION-MOD FREQ and DATA ENTRY keys to first frequency
(11) Frequency counter indication will be within limits specified for frequency listed