Avtech AVB1-3, Instructions For Use Manual, Page: 7 / 9

CONTROLS
The “OUT N” and “OUT P” SMA connectors are connected to the pulse combiner on the
top of the main module, through factory-installed cabling.
The external trigger is applied to the TRIG input connector. The input impedance is ≥
1kΩ. A feed-through 50 terminator is recommended for maximum signal integrity.
When the INT / EXT switch is in the INT position, the center frequency of the output
waveform is controlled by the FREQ potentiometer. This potentiometer may be adjusted
with a screwdriver.
When the INT / EXT switch is in the EXT position, the center frequency of the output
waveform is controlled by a voltage applied to the solder terminal adjacent to the INT /
EXT switch. This user-generated voltage may be adjusted from 0 to +10V,
corresponding to a center frequency range of 400 to 900 MHz.
The +15V and GND power terminals are on the opposite face of the module.
TRIMPOT ADJUSTMENTS
The ten-turn trim pots PW and T control the pulse widths (PW) and pulse separation (T)
of the positive and negative components of the monocycle waveform. At the time of
shipping, these controls were set to provide optimal output and should not require any
further adjustment.
OTHER GENERAL OPERATING NOTES
1) The bandwidth capability of components and instruments used to display the
monocycle generator output signal (attenuators, cables, connectors, etc.) should
exceed 5 GHz.
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FREQ
OUT
P
INT
OUT
N
EXT
TRIG