TB 9-6625-2021-35
(6) Adjust autotransformer output to 125 V ac. Allow 1 minute for oscillator to
recorded in (4) above.
(7) Adjust autotransformer output to 115 V ac.
b. Adjustments. No further adjustments can be made.
9. Self-Check
a. Performance Check
(1) Set RANGE switch to CHK and press and release RESET switch. TI display
will initially be all zeros and then 10.000000 MHz 1 count; the DIR (direct) annunciator
will light and the GATE annunciator should be flashing.
(2) Press RESOLUTION Hz pushbutton to positions listed in table 3. TI display
will be as specified.
Table 3. Self-Check
Display
RESOLUTION Hz
1 count
pushbutton positions
10
Hz
10.00000MHz
100
Hz
10.0000 MHz
1
kHz
10.000 MHz
10
kHz
10.00
MHz
100
kHz
10.0
MHz
1
MHz
.010 GHz
b. Adjustments. No adjustments can be made.
10. 10 Hz to 250 MHz Frequency and 1 MΩ Input Sensitivity Check
a. Performance Check
(1) Press RESOLUTION Hz pushbutton to 10, adjust SAMPLE RATE control to
midposition, and set RANGE switch to 10 Hz-250 MHz.
NOTE
Throughout the remainder of this check, press RESOLUTION
Hz pushbuttons as necessary.
(2) Connect function generator
Function Outputs Unbalanced to TI INPUT
1 MΩ using a 50Ω feedthrough termination.
(3) Set function generator for a sinewave, 10 Hz, 1 mVp-p, 50Ω output. Slowly
If function generator amplitude exceeds 141 mVp-p, perform b below.
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