B&K Precision 4084-4087 - Manual - Manual (Page 23)

4080 series Function & Arbitrary/Function Generators –Instruction Manual
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4.5.5 TTL Signal
A TTL signal output is provided on the front-panel TTL terminal. All signals, including modulated
signals and arbitrary waveforms (except DC and noise) have an associated TTL signal.
This signal is a TTL “high” when the waveform’s output (on the main terminal) is positive, relative
to zero volts. The signal is a TTL “low” when the output is negative. The TTL signal is generated by
passing the main output signal through a comparator configured as a Schmitt Trigger. The TTL
signal will transition to high or low once the main output signal exceeds a certain threshold value,
which causes a time delay between the main output signal and the TTL signal.
4.5.6 Signal Store and Recall
Up to 10 different instrument states can be stored in non-volatile memory. This enables you to recall
the entire instrument configuration with a single command from the remote interface or with just a
few key presses from the front panel.
The state storage feature “remembers” the function (including arbitrary waveforms), frequency,
amplitude, DC offset, duty cycle, as well as any modulation parameters. To recall a stored state, you
must use the same memory location used previously to store the state.
The last state of the instrument before power-off is automatically stored in location #0, therefore a
total of 11 groups locations ranging from 0 ~ 10 can be recalled.
Example:
Store the current output signal in group location #1:
【Shift】【Store】【1】【N】
The following prompt will be displayed for a few seconds: “STORE 1”
Previously stored signal configurations will be overwritten.
To recall group location #1 and make it the active output signal:
Press【Shift】 【recall】【1】【N】
The following prompt will be displayed for a few seconds: “RECALL: 1”
The stored signals can be continuously recalled and reproduced by scrolling through each location
using the knob.