BNC 685 2C-PAT, User Manual

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59
Operator’s Manual Simple AFG Application
Berkeley Nucleonics Corporation
info@berkeleynucleonics.com | www.berkeleynucleonics.com
2955 Kerner Blvd, San Rafael, CA 94901 | 800-234-7858
Rev 1.1
•
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:
-
𝐶𝐶𝐿𝐿𝑇𝑇𝑇𝑇𝐿𝐿𝐿𝐿𝑇𝑇 𝐹𝐹𝑇𝑇𝐿𝐿𝐹𝐹𝐹𝐹𝐿𝐿𝐿𝐿𝐹𝐹𝐹𝐹 − Hop Frequency > 0 𝐻𝐻𝐻𝐻
-
𝐶𝐶𝐿𝐿𝑇𝑇𝑇𝑇𝐿𝐿𝐿𝐿𝑇𝑇 𝐹𝐹𝑇𝑇𝐿𝐿𝐹𝐹𝐹𝐹𝐿𝐿𝐿𝐿𝐹𝐹𝐹𝐹 + Hop Frequency ≤ 𝑀𝑀𝐿𝐿𝑀𝑀𝐿𝐿𝑀𝑀𝐹𝐹𝑀𝑀 𝐹𝐹𝑇𝑇𝐿𝐿𝐹𝐹𝐹𝐹𝐿𝐿𝐿𝐿𝐹𝐹𝐹𝐹
Where the Maximum Frequency depends on the selected carrier.
• Phase Shift Keying (PSK): this 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 in percentage. The deviation has
to meet the following conditions:
-
𝐿𝐿𝐿𝐿𝐷𝐷𝐿𝐿𝐿𝐿𝑊𝑊𝐿𝐿𝑃𝑃𝐿𝐿 [%] ≤ 𝐿𝐿𝐹𝐹𝑊𝑊𝐹𝐹 𝐹𝐹𝐹𝐹𝐹𝐹𝑇𝑇𝐿𝐿 [%] −
𝐿𝐿𝐿𝐿𝐿𝐿𝐿𝐿𝐿𝐿𝐿𝐿𝐿𝐿 𝐸𝐸𝐿𝐿𝐿𝐿𝐿𝐿 [ 𝑠𝑠 ]
0 . 8
∗
100 [%]
𝑃𝑃𝐿𝐿𝑃𝑃𝐿𝐿𝑃𝑃𝐿𝐿 [ 𝑠𝑠 ]
− 𝜀𝜀
-
𝐿𝐿𝐿𝐿𝐷𝐷𝐿𝐿𝐿𝐿𝑊𝑊𝐿𝐿𝑃𝑃𝐿𝐿 [%] ≤ 100[%] − 𝐿𝐿𝐹𝐹𝑊𝑊𝐹𝐹 𝐹𝐹𝐹𝐹𝐹𝐹𝑇𝑇𝐿𝐿 [%] −
𝑇𝑇𝑃𝑃𝐿𝐿𝐿𝐿𝑇𝑇𝐿𝐿𝐿𝐿𝐿𝐿 𝐸𝐸𝐿𝐿𝐿𝐿𝐿𝐿
[
𝑠𝑠
]
0 . 8
∗
100
[%]
𝑃𝑃𝐿𝐿𝑃𝑃𝐿𝐿𝑃𝑃𝐿𝐿 [ 𝑠𝑠
]
− 𝜀𝜀
Where ε is a small margin to avoid that the duty cycle reaches the 0 % or the 100 % and the
factor “0.8” takes into account that the edges are defined as 10-90%.
Sweep
The Sweep mode modulates the waveform frequency following a law that can be Linear, Logarithm,
Upstair
or
User Defined.
The
User Defined
selection gives the possibility to load the sweep profile from
a file.
The Sweep is available for all function except for Pulse, Double Pulse, Noise and DC level.