Operator’s Manual Simple AFG Application
60
•
Frequency Shift Keying (FSK):
this modulation is a 2 level FSK. The carrier frequency switches
between the initial carrier frequency and the initial carrier fre
Hop Frequency [Hz]
. It is
available for all functions except for the Pulse, Double Pulse, DC level and Noise.
Note that the Hop Frequency can be negative and it must satisfy the following conditions:
-
𝐶𝑎𝑟𝑟𝑖𝑒𝑟 𝐹𝑟𝑒𝑞𝑢𝑒𝑛𝑐𝑦 − Hop Frequency > 0 𝐻𝑧
-
𝐶𝑎𝑟𝑟𝑖𝑒𝑟 𝐹𝑟𝑒𝑞𝑢𝑒𝑛𝑐𝑦 + Hop Frequency ≤ 𝑀𝑎𝑥𝑖𝑚𝑢𝑚 𝐹𝑟𝑒𝑞𝑢𝑒𝑛𝑐𝑦
Where the Maximum Frequency depends on the selected carrier.
•
Phase Shift Keying (PSK):
this type of modulation is a 2 level PSK. The carrier phase is shifted by
the value of
Hop Phase [deg]
. It is available for all functions except for the Pulse, Double Pulse,
DC level and Noise.
The hop phase is between 0 and 360 deg.
•
Pulse Width Modulation (PWM):
this modulation is available only for the Pulse waveform. It
modulates the width of the Pulse of the quantity defined in the
Deviation [%]
parameter that
defines the maximum increase and decrease of the Duty Cycle percentage. The deviation has to
meet the following conditions:
-
𝑑𝑒𝑣𝑖𝑎𝑡𝑖𝑜𝑛 [%] ≤ 𝑑𝑢𝑡𝑦 𝑐𝑦𝑐𝑙𝑒 [%] −
𝐿𝑒𝑎𝑑𝑖𝑛𝑔 𝐸𝑑𝑔𝑒[𝑠]
0.8
∗
100[%]
𝑃𝑒𝑟𝑖𝑜𝑑 [𝑠]
− 𝜀
-
𝑑𝑒𝑣𝑖𝑎𝑡𝑖𝑜𝑛 [%] ≤ 100[%] − 𝑑𝑢𝑡𝑦 𝑐𝑦𝑐𝑙𝑒 [%] −
𝑇𝑟𝑎𝑖𝑙𝑖𝑛𝑔 𝐸𝑑𝑔𝑒[𝑠]
0.8
∗
100[%]
𝑃𝑒𝑟𝑖𝑜𝑑 [𝑠]
− 𝜀
Where
ε
is a small margin to avoid that the duty cycle reaches the 0 % or the 100 % and the
factor “0.8” take in account that the edges are defined as 10
-90%.
