Equipment and approach for performing a long-term measurement of clock signals

Question

This is a follow up question for the circuit I designed with the inspiration from here. The circuit works but over time there appears to be some clock jitter or skew. I am interested in an approach to perform a long-term measurement with a measurement period of at least 30min and then process the data with Matlab or Python, to see whats going on. I have never thought of how to perform a measurement like this and did not find anything useful with my google search.

The goal of the circuit is to multiply a 48kHz wordclock input to 12MHz clock for the Cool Audio V2902 codec Datasheet here. The circuit was designed with the following components:

• BNC Input with 75Ohm

• Input Buffer: TI RC4558, Datasheet

• Multiplicator: CS2300CP-CZ, Datasheet

• A switch for choosing the internal crystal (moved from the Behringer PCB to my extension PCB) or the external source, Datasheet

Unfortunately, I have overseen that the RC4558 is specified for a supply voltage starting at 5V. My circuit works on 3.3V. I removed the IC and replaced the input and output solder pads with a wire. This leaves me with the following circuit (The RC4558 was originally placed between C1 and C2):

As already asked above: How can I measure the clock signal over a long time (at least 30 minutes) and then process the data. An initial idea was to use Matlab with a R&S HMO2024(Datasheet). More details about Matlab with the R&S oscilloscope here. Is this a meaningful approach and what other options are there?

UPDATE:

Thank you for all your comments on this project. Here is the current status of the project:

• I use a Rohde&Schwarz HMO2024 with Matlab R2019 and the Instrument Control Toolbox. More details here.

• The HMO driver from R&S is very easily installed on Windows 10. Not sure if there is a Linux/Mac OS version. There is this .zip file for Linux/Mac OS but I did not understand how to install the files it contained. Rohde & Schwarz HMO driver page here

• The SCPI commands for the HMO Series can be found here

With some tests I found out that a data transmission usually takes around one second. This is fast enough for me. For initial testing I used the GUI and the help of this video.

clc;
close all;
%% Instrument Connection
% Find a serial port object.
obj1 = instrfind('Type', 'serial', 'Port', 'COM4', 'Tag', '');

% Create the serial port object if it does not exist
% otherwise use the object that was found.
if isempty(obj1)
    obj1 = serial('COM4');
else
    fclose(obj1);
    obj1 = obj1(1);
end
set(obj1, 'InputBufferSize', 500000);
% Connect to instrument object, obj1.
fopen(obj1);

%% Read identifier
%data1 = readData(obj1, "*IDN?");

%% Set start stop of measurement
% Number of measurements
measurementLength = 5;

%% Configure device
%Acquire mode to real time mode
writeData(obj1, "ACQ:MODE ETIM");

% Get samplerate
fs = str2double(readData(obj1,"ACQ:SRAT?")); 
i = 1;

timestamp = zeros(measurementLength,6);

% First measurement
disp("Measurement: 1");
timestamp(1,:) = clock;
data_char = readData(obj1, "CHAN1:DATA?");
data = str2double(split(data_char,','));

% second measurement til end
for i=2:measurementLength
    disp("Measurement: " +num2str(i));
    timestamp(i,:) = clock;
    data_char = readData(obj1, "CHAN1:DATA?");
    data = [data str2double(split(data_char,','))];
end

readData.m

function data1 = readData(obj, command)
% Reads data from given object
fprintf(obj, char(command));
data1 = fscanf(obj);
end