TB 9-6625-2339-35
a. Connect TI to 115 V ac power source.
c. Press LINE pushbutton to ON and record the power on time.
d. Ensure TI is not in external reference mode.
e.
Set up
electronic counter to
measure frequency to
0.001 Hz
resolution.
f. Wait 5 minutes then record electronic counter reading to 0.001 Hz resolution as
counter reading 1.
g. Wait 10 more minutes then record electronic counter reading to 0.001 Hz resolution
as counter reading 2.
h. Wait 45 more minutes the record electronic counter reading to 0.001 Hz resolution
as counter reading 3.
i. Calculate the 5 minute warmup error (in ppm) by subtracting counter reading 3
from counter reading 1 and dividing the result by 10. The calculated value will be 0 0.1
ppm.
j. Calculate the 15 minute warmup error (in ppm) by subtracting counter reading 3
from counter reading 2 and dividing the result by 10. The calculated value will be 0 0.01
ppm.
k. If time base is out of tolerance perform (1) through (5) below:
(1)
Press System key.
(2)
Press [Alignments].
(3)
Press [Timebase].
(4)
Press [Course] or [Fine] as needed.
(5)
Press <Return key three times when finished.
8. Frequency
Readout and Marker Frequency Count Accuracy
a. Performance Check
(1) Connect TI 10 MHz REF OUT to signal generator 10 MHz REF IN.
(2) Connect signal generator RF Output to TI INPUT 50 Ω.
(4) Press TI keys and enter values as listed in (a) through (f) below: