It is highly recommended to check whether the tight contact obtained or not after
the first testing of the generator. Unscrew the cable connector; it should be no any
ozone or burnt smell from the connectors or any burnt traces.
During normal operation, please do not disconnect and connect again the high
voltage connectors many times to prevent the contacts wearing and contamination.
Silicon oil has been already applied to both connectors at the factory. It remains
inside the mating connector pair during very long time and prevent arcing.
Step 4.
Attach semirigid coaxial cable assembly to the output module SMA connector;
attach two 20dB attenuators and if required SMA-to-BNC adapter for the
connection to oscilloscope (see Fig.4). 1:40 coupler together with two 20dB
attenuators gives 4000 total division coefficient. 10 kV pulse divided by 4000
times results in 2.5V measured signal which can be directly applied to 50 Ohm
impedance oscilloscope input. Some of high bandwidth oscilloscopes allow up to
1V maximum input pulse amplitude only. Please install one more 20dB attenuator
(not included) in this case.
Fig.4. Output module connection to NRG1001 generator, sample and oscilloscope.
Attach the attenuators just to the oscilloscope input, but not to the SMA
coupler output of the module. This improve signal-to-noise ratio of the
registered signal.
User manual of NRG1001 HV rectangular pulse generator 9
