TB 9-6625-2143-24
Adjustments required to calibrate the TI are included in this procedure. Additional
maintenance information is contained in the manufacturer's manual for this TI.
d. When indications specified in paragraphs 8 through 13 are not within tolerance,
perform the power supply check prior to making adjustments. After adjustments are made,
repeat paragraphs 8 through 13. Do not perform power supply check if all other
parameters are within tolerance.
e. Unless otherwise specified, all controls and control settings refer to the TI.
WARNING
HIGH VOLTAGE is used or exposed during the performance of
this calibration.
DEATH ON CONTACT may result if
personnel fail to observe safety precautions.
REDUCE
OUTPUT(S) to minimum after each step within the
performance check where applicable.
7. Equipment Setup
a. Connect TI to 115 V ac source.
b. Set POWER switch to on and allow 5 minutes for warm-up and stabilization.
8. Frequency Display
a. Performance Check
(1) Position controls as listed in (a) through (m) below:
SCALE LOG 10 dB pushbutton pressed. AFC pushbutton released.
(a)
AMPLITUDE REF LEVEL control to 0 dB (normal).
(b)
Calibration switch to dBm 900 /LIN.
(c)
INPUT SENSITIVITY control to 0 dB.
(d)
INPUT SENSITIVITY vernier (amplitude) to midrange.
(e)
INPUT MODE switch to UNBAL.
(f)
RESOLUTION BANDWIDTH control to 3 Hz.
(g)
DISPLAY SMOOTHING control to MIN.
(h)
FREQ SPAN control to 50 Hz.
(i)
SWEEP MODE control to MAN.
(j)
MANUAL VERNIER control to mid-range.
(k)
OUTPUT MODE switch (rear panel) to TRACKING OSC.
(l)
LEVEL control (rear panel) fully cw.
(m)
(2) Connect frequency counter to rear panel OUTPUT.
(3) Set frequency counter controls to measure frequency of 10 kHz with 0.1 Hz resolution.
(4) Connect function/arbitrary generator to INPUT using 50
feedthrough
termination.
+12.55 dBm (0.949 V rms).
(6) Adjust FREQUENCY control for 10,000 Hz indication on frequency display.