88 Chapter2
Making Adjustments
13. Third Converter and Second IF Bandpass
600 MHz Adjustment
14.Set the microwave frequency counter controls as follows:
50 Ω/1 MΩ ......................................... 50Ω Impedance
10 Hz–500 MHz/500 MHz–18 GHz . 10 Hz–500 MHz
SAMPLE RATE .......................................... Midrange
15.Disconnect W8 from A9J5 600 MHz OUT, then connect the
microwave frequency counter to A9J5.
16.Adjust A9R68, 600 MHz ADJ, for a frequency of 600 MHz±2 kHz
(599.998000 MHz to 600.002000 MHz).
17.Remove the test cable from A9J5, then reconnect W8.
18.Continue with “LPF, Attenuator and Adapter Insertion Loss
Characterization.”
LPF, Attenuator and Adapter Insertion Loss
Characterization
19.Zero and calibrate the measuring receiver and power sensor
combination in LOG mode as described in the measuring receiver
operation manual.
CAUTION Do not attempt to calibrate the power sensor without the reference
attenuator or damage to the power sensor will occur.
20.Zero and calibrate the power meter and 300 MHz power sensor, as
described in the power meter operation manual.
21.Connect the equipment as shown in Figure 2-23. Connect the
300 MHz power sensor directly to the Power Splitter (bypass the
LPF, Attenuator and Adapters).
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