TB 9-6625-103-24
Table 8. 25 GHz Output Level Test 10 dB Steps.
Test instrument
Measuring receiver
Measuring receiver
output level
Min (dB)
Max (dB)
(dB)
0
-1.5
1.5
-10
-11.5
-8.5
-20
-21.5
-18.5
-30
-31.5
-28.5
-40
-41.5
-38.5
-50
-51.5
-48.5
-60
-61.5
-58.5
-70
-71.5
-68.5
b. Adjustments. Refer to paragraph 6 c.
11. Spectral Purity
a. Performance Check
(1) Connect equipment as shown in figure 2.
Figure 2. Spectral Purity Hook-up.
(2) Press TI keys as listed in (a) through (e) below.
(a)
Preset.
(b)
RF On/Off to Off.
(c)
AMPD, 6, and dBm.
(d)
FREQ, 1, 0, and MHz.
(e)
RF On/Off to On.
(3) Set measuring receiver as listed in (a) through (e) below:
(a)
Mode to spectrum analyzer.
(b)
Frequency Channel to 10 MHz.
(c)
Measure to harmonic distortion.
(d)
Trace/View to Harmonics and THD.
(e)
Press Restart.