For single channel devices, use only the Channel A analog input and
output connectors. For stereo (or 2-channel) devices, Channel A is
usually used for the Left channel and Channel B for the Right channel.
To simplify connection, analog test cables are often marked with the
following color code:
.
Left in: Blue (sometimes black is used instead)
.
Left out: Yellow
.
Right in: Red
.
Right out: Green
When you connect your device under test, it is a good idea to select
the proper input and output impedances and the balanced/unbalanced
configuration for the generator. The input impedances are controlled
by the Main Panel in Level mode. Follow these steps to get there:
The lower center soft key controls the termination of the channel A
input. The lower right soft key controls the termination of the channel
B input. Each input can be selected as HiZ or LoZ. The HiZ selection
provides input terminations near 100 kΩ. The LoZ selection provides
input terminations of 600 Ω.
In most cases, you will want to use HiZ terminations. The main
exception is when you are working with equipment that requires
600 Ω terminations. Check your devices output specifications to see if
a termination of 600 Ω is required.
The analog generator’s output impedance and balanced/unbalanced
configuration is selected on the Generator Only Panel in Analog
Generator Control Mode. To get there, follow these steps:
The lower center soft key selects the generator output impedance and
configuration. The choices are 50 Ω UNBAL, 50 Ω BAL, 150 Ω BAL
and 600 Ω BAL.
If your device under test has unbalanced inputs, you should select the
50 Ω unbalanced configuration.
If your device has balanced inputs, the 50 Ω balanced selection is
usually the desired choice. The 150 Ω and 600 Ω selections are
generally only used with devices that have an equivalent input
impedance. Check the input specifications for your device. For
devices with higher input impedances, choose 50 Ω.
3 Operation
Operational Overview External Connections
ATS-1 Access User's Manual 3-29
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