TB 9-6625-2333-24
(4) Adjust TI knob ccw for a ' MKR indication between -9.5 and -10.5 dB.
(5) Press TI keys as listed in (a) through (d) below:
[MARKER NORMAL].
(a)
[MARKER o CF].
(b)
SPAN then [ZERO SPAN].
(c)
CONTROL SWEEP then [SWP TIME MAN] to 200 ms.
(d)
(6) If TI trace is not about 5 divisions below reference level, press TI FREQUENCY
key and adjust TI knob to adjust center frequency until trace is approximately 5 divisions
below reference level.
(7) Press TI INSTRUMENT STATE SGL SWP key and MARKER MKR key.
(8) Locate the horizontal division with the greatest amplitude deviation. Adjust TI
knob to place marker at highest point in the horizontal division with the greatest amplitude deviation.
(9) Press TI [MARKER DELTA] key. Adjust TI knob to place marker at lowest
point within the same division. Record TI ' MKR amplitude indication.
(10) Multiply TI ' MKR amplitude indication recorded in (9) above by 0.457 Hz/dB.
Calculated value will be <1 Hz/dB.
NOTE
The 0.457Hz/dB is the slope of the 10 RES BW filter at 10 dB
below the peak of the filter.
b. Adjustments. No adjustments can be made.
14. Frequency Readout and Frequency Count Marker Accuracy
a. Performance Check
(1) Connect TI 10 MHz REF IN/OUT to synthesized signal generator 10 MHz REF IN.
(2) Connect synthesized signal generator RF Output to TI INPUT 50:.
(3) Set synthesized signal generator frequency to 1.5 GHz and level output to -10 dBm.
(4) Press TI keys and enter values using DATA keys as listed in (a) through
(f) below:
INSTRUMENT STATE PRESET.
(a)
FREQUENCY then [CENTER FREQ] to 1.5 GHz.
(b)
SPAN then [SPAN] to 1 MHz.
(c)
INSTRUMENT STATE RECALL.
(d)
[MORE 1 OF 2].
(e)
[FACTORY PRSEL PK].
(f)
(5) Press TI MARKER PEAK SEARCH key. TI MKR frequency indication will be
between 1.499988 and 1.500012 GHz.
