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Troubleshooting
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Select:
Testing
RF Controls
Measure the output of the VCO (G500) at T502 with spectrum analyzer and 500 ohm passive probe;
the power should be around –20 dBm.
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The 26 MHz oscillator (G502) is used as a reference frequency for the PLL synthesizer and as the sys-
tem clock for BB ( 13 MHz) after it is divided by 2 in HAGAR. 26 MHz signal from the VCTCXO is
approx. 0,8 Vpp. Frequency of this oscillator is adjusted by dc voltage ( Vcon ) coming from the DAC in
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Cont. Mode Ch: 60
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PAMS Technical Documentation
Alt+p
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Alt+o, 60
T502
unbalanced
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