SFRA45 User Manual
8-11
Waveform –
Has five options: “
sinewave, squarewave,
triangle, ramp
and
white noise”.
The use and selection of
the different waveforms are dependent on user need.
Generator Frequency -
This function determines the
generator output frequency. The “
Frequency Step
”
function determines the multiple amounts the frequency
changes when required to step up or step down. The
“
Step type
” can be either set for linear or logarithmic
depending on user preference.
Output –
This controls the relevant output connection and
has two options:
“off, on”.
8.8
Input Channels
Input –
Has two options from the right menu, “
high Z”,
and “50 Ohms”
. The two channels are controlled
independently but sampled synchronously.
N4L
Clamps
–
Has
two
options,
“No”,
“Yes”.
“No” will disable clamp correction, “Yes” will enable
clamp correction.
CHx input ranging –
Has three options ‘
full auto range’
,
‘
range up only’ and “manual”
. Use full auto range for
normal signals allowing the instrument to select the
optimum range for the signal level. Range up is useful for
rapidly fluctuating signals as the shunt will stay on the
range suitable for the highest signal level. Manual will add
“CHx input range” to the menu where the user can define
which range is used. This is also applicable to Channel 2
when used in FRA mode. The input ranges have nominal
full-scale values set with a ratio of 1:
10 from 1mV to
10V. When the instrument is using selective high-
frequency measurements (heterodyning) the ranges
