Section 3: Software Reference
S530 Parametric Test Systems Frequency Analysis Option Manual
3-4
S530-923-01 Rev. A / January 2014
Figure 5: Maximum signal detected sample
ring_meas
Purpose
: This test routine determines the ring oscillator frequency. The module sets the user
defined noise level and performs several frequency measurements until it finds the
frequency peak in the desired frequency range. Input parameters
freq_expected
and
tolerance define the desired frequency range. A failure is returned, if the frequency
cannot be found.
Parameters
:
Inputs
Type
Description
vcc_pin
int
Pin connected to V
cc
vccb_pin
int
Pin connected to V
ccb
vss_pin
int
Pin number of V
ss
pin
out_pin
int
Pin number of signal output pin
vdd
double Voltage of V
cc
freq_expected double Expected frequency, Hz
tolerance
double Frequency range, Hz
noise_level
double User defined noise level, dB
