24
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
Analog Outputs
The MODEL 685 instrument series has 2/4/8 analog output channels, each one is single-ended or
differential (depending on the Model) and the connector type is a standard SMA.
Marker Outputs
Each Marker Out is a digital output channel that can generate programmable digital patterns
synchronous to the analog outputs. Its impedance is 50 Ohm and the output voltage amplitude ranges
from -0.5 to 1.65 V into 50 Ohm load.
To set the Marker Out parameters refer to the Marker Settings.
The connector type is a standard SMA.
Marker Out Specification Value
Connector
1 SMA for each pair of channels on the Front Panel
Output impedance
50 Ω
Output level (into 50 Ω)
-0.5 V to 1.65 V
Model
Marker Out Connectors
Model 685-2C
1 SMA on the Front Panel
Model 685-4C
2 SMAs on the Front Panel
Model 685-8C
4 SMAs on the Front Panel
Model 685-2CD
1 SMA on the Front Panel
Model 685-4CD
2 SMAs on the Front Panel
Model 685-8Cd
4 SMAs on the Front Panel
Trigger Inputs
The Trigger In 1/2 (Trigger In connectors on the front panel) allow to control the generation by an
external signal source. They have a selectable impedance of 1 kOhm or 50 Ohm. To know how to set the
trigger parameters or the Run Mode refer to the paragraph “Trigger”. In Continuous mode the Trigger
Inputs don’t have any effect.
Trigger In Specification Value
Connector
SMA on the Front Panel
Number of connectors
2
Input impedance
1
kΩ
or 50
Ω
selectable
Slope/Polarity
Positive or negative selectable
