Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide 77
Self Test
Self Test Descriptions
312 Sum VCO Detector
This test checks that the sum VCO outputs a signal at various tuning voltages.
This test is performed with the sum loop opened.
313 Sum Attenuator (MXG)
This test checks that the adjustable sum attenuator is working properly. The
sum VCO is first set to open loop mode.
314 Sum PLL Unlock Detector
This test checks that the offset PLL unlock detector is properly working.
315 Sum Reference Select (MXG)
This test checks the reference frequency to the sum loop phase detector.
316 Sum Tuning Voltage
This test checks the tuning voltage of the sum VCO at different frequencies by
setting the frequency appropriately. The sum loop will be closed while this test
is executed.
317 First X2 Path
This test checks the VCO filter as well as the signal path through the first x2
multiplier path.
For the filter band tests, each filter band is tested with a frequency within the
passband and a frequency outside the passband. In the case of the 1.9 to 2.4
GHz band, two frequencies are used to test the stop band: one lower and one
higher.
318 Second x2 Multiplier Path
This test checks the signal path through the second x2 multiplier path.
Like the first x2 multiplier tests, each filter band is tested with a frequency
within the passband and a frequency outside the passband. In the case of the
3.8 to 4.8 GHz band, two frequencies are used to test the stop band: one lower
and one higher.
319 Divider Path
This test checks the signal path through the divider path of the synthesizer.
320 Multiplier Attenuator
This test checks that the adjustable multiplier attenuator is working properly.
The synthesizer frequency is set to 6 GHz by setting the front panel frequency
to 749.99999999 MHz and then switching the filter and divider paths
appropriately to select the x4 path. The attenuator is set to minimum
attenuation (0 dB) and maximum attenuation (31.75 dB) while a power
detector is used to sense the change in power.
To Next Page
Loading...
Need help?
General
