Avtech AV-1002-C-KMP2 Instructions Manual page 11

DELAY Controls
The rotary switch selects one of eight ranges and the vernier provides continuously
variable control of each range. The instrument is set to the delay indicated on the front
panel when the vernier is in the "MAX" position.
PULSE WIDTH Controls
The rotary switch selects one of seven ranges and the vernier provides continuously
variable control of each range. The instrument is set to the pulse width indicated on the
front panel when the vernier is in the "MAX" position.
GND/VAR Baseline Switch
The GND/VAR switch allows the baseline offset of the main output pulse to be either fixed
at ground potential (GND, zero Volts) or to be continuously variable between + 10V and
-10V (or + 5V and -5V, depending on the amplitude range selected. See descriptions
below.)
BASELINE Control
The BASELINE Control varies the baseline offset of the main output pulse when the
GND/VAR switch is in the "VAR" position. If the amplitude range switch is in the 10V range,
the baseline may be varied between + 10V and -10V, into a 50 load. if the range switch
is in the 5V or 1V ranges, the baseline may be varied between + 5V and -5V. This is due
to the fact that in the 1V and 5V ranges, the instrument switches in a 50Q backmatching
resistor in series with the output. This, is effect, forms a resistive divider, limiting the baseline
to 5V, but the backmatching provides a more electrically ideal situation.
POLARITY Switch
If the polarity switch is in the "+ " position, the main output pulse will pulse upwards (i.e. to
a more positive level.) If it is in the "-" position, the output will pulse downwards, to a more
negative level. This switch does not affect the BASELINE controls.
AMPLITUDE RANGE Switch
When in the 1V range, the main output is between variable in amplitude from 0 to + 1V,
peak to peak. Similarly, in the 5V and 10V ranges, the amplitude is variable from 0 to + 5V
and +10V respectively. The 1V and 5V have 50Q backmatching on the output, as
mentioned in the baseline descriptions, while the 10V range does not.