Section 3 MS2667C
3-30
3.2.5.4 IF Gain-1 (ATT), IF Gain-2 (AMP) of External Mixer Band adjustment
Required equipment :
(1) MG3633A Synthesized signal generator
(2) ML2437A Power sensor
(3) MA2444A Power sensor
Setup :
(1) Connect 1st Local output connector of the spectrum analyzer to RF OUTPUT of MG3633A by cable.
(2) Connect REF OUTPUT connector of MG3633A to REF In of the spectrum analyzer.
Procedure :
(1) Keep key “0” depressed while switching on the spectrum analyzer.
(2) Initialize the spectrum analyzer :
1) Enter Preset menu with “preset” key.
2) Initialize the spectrum analyzer completely with “F1” key.
(3) Calibrate the spectrum analyzer using its internal calibration function :
1) Enter Cal menu with “Shift” key and “0” key.
2) Calibrate the spectrum analyzer by pushing “F1” key.
[ External mixer band ]
(4) Set External mixer band on condition :
1) Enter Frequency menu by pushing “Frequency” key, and open its second page with “more” key.
2) Enter External mixer Band menu with “F2” (External Mix) key.
3) Set external band on by pushing “F1” (Ext Mix ON/OFF) key.
(5) Set conversion loss to 15 dB :
1) Press “F4” (Conversion loss) + “1” + “5” + “dB” keys.
(6) Set the spectrum analyzer to :
Center frequency : 25 GHz (Press “F4” (Center frequency) + “2” + “5” + “GHz”)
Span : 1 MHz (Press “F5” (Span) + “1” + “MHz”)
7) Adjust the MG3633A output level to make power meter reading -25 dBm ±0.1 dB at end of cable feeding the signal to
the spectrum analyzer, and then connect the cable to the spectrum analyzer’s 1st Local output connector on Front
panel.
(8) Enter RF/Micro Conv maintenance menu, and open its 6th page :
1) Enter Cal menu by pushing “Shift” + “0” keys. Open second page of Cal menu by pushing “more”.
2) Enter maintenance menu with “F6” (Maintenance) key.
3) Enter RF/Micro Converter maintenance menu with “F2” (Mainte RF/Micro conv) key. Open the 6th page of RF/
Micro converter maintenance menu (Press “more” key 5 times).
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