TB 9-6625-2323-24
(a) Modulation, AM, More, Log/Linear to display Depth in %, and
Previous Menu.
(b) Edit Depth, 3, 0, Hz ns Adrs, Edit Depth.
(c) Mod Wave, press arrow key to highlight sine wave, press Select, and
Previous Menu.
(d) Edit Rate, 1, 0, kHz s Step, and Edit Rate.
(7) Set measuring receiver to measure phase modulation, with +PEAK detector.
(8) Verify that the measuring receiver indicates within Incd. PM @ 5 GHz limits
listed in table 12.
Table 12. AM Meter
Measuring receiver indication
Test description
Min (%)
Max (%)
50% AM @ 5 GHz
45.0
55.0
Incd. PM @ 5 GHz
0.001
0.2
(9) Set measuring receiver to measure amplitude modulation, with +PEAK detector,
high pass filter to <20 Hz, and lo pass filter to >20 kHz.
(10) Press TI keys as listed in (a) through (h) below.
(a) Frequency Control, F0, Edit F0, 5, and GHz Sec dBm.
(b) Level Control, L1, Edit L1, -3, and MHz ms dB.
(c) Modulation, AM, More, Int/Ext to select External AM Status.
(d) Output On Off to on.
(e) More, Log/Linear to display Sensitivity in dB, and Previous Menu.
(f) Front/Rear to display Source Front.
(g) 600 :/50 : to display Impedance 600 :.
(h) Edit Sens, 6, MHz ms dB, and Edit Sens.
(11) Set audio analyzer controls as listed in (a) through (c) below.
(a) SOURCE FREQ to 30 Hz.
(b) SOURCE LEVEL to 1, V.
(c) Impedance to 600 :.
(12) Set the measuring receiver to AM in Ratio mode.
(13) Verify that the measuring receiver indicates within limits listed in table 13.
(14) Set the audio analyzer output frequency to the values listed in table 13 and
repeat (13) above.
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