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Operator’s Manual Simple AFG Application
Berkeley Nucleonics Corporation
[email protected] | www.berkeleynucleonics.com
2955 Kerner Blvd, San Rafael, CA 94901 | 800-234-7858
Rev 1.1
Input / Output Channels
The MODEL 685 has 2/4/8 independent analog channels. Each channel can be single-ended or
differential (depending on the Model) and it is available on a SMA connector (or two SMA connectors
for the differential output) located in the front instrument panel (CH1, Ch2, …, CHn output).
The Marker Out is a digital output signal available on a SMA connector located in the front instrument
panel (MARKER OUT 1, MARKER OUT 2, …, MARKER OUT n).
One marker out for each couple of analog channels is available in a SMA connector located in the front
panel.
Depending on the instrument Model, it is possible to choose in the software what is the analog channel
in the couple that is related to the marker: CH1/CH2, CH3/CH4, CH5/CH6, CH7/CH8.
The Trigger In is an input signal available in a SMA connector located in the front instrument panel
(TRIGGER IN 1 and TRIGGER IN 2).
The External Modulation Input is an input signal available in a SMA connector located in the rear
instrument panel (Ext. Mod. In).
The Trigger In and the External Modulation Input signals are common input sources for all the
instrument channels.
Analog Output Channel
The term Output Channel, as used in this user manual, refers to the analog signal provided on the SMA
output connector located in the front instrument panel.
For some parameters the Simple AFG application supports different input formats. For example, it is
possible to specify the frequency of a waveform or alternatively it is possible to specify the
corresponding time period. It is possible to switch between two different parameter formats by just
touching on the label of the parameter.
Note that the input format is the same for all channels, so if the High/ Low Level format is selected for
channel 1 then also the channel 2, …., channel N will use the same format.
Main Channel Vertical Parameters
The Simple AFG application provides the control of the vertical (voltage) parameters of the Output
channel in the format
Amplitude[Vpp] / Offset[V]
or in the format
Voltage High[V]
/
Voltage Low[V]
. By touching the labels, you can switch between the two formats.
