B&K 4070A Arbitrary Waveform Mode, Int Clock / Ext Clock / Lock Master Lock slave mode, Phase

7.4 Arbitrary Waveform Mode

		1		4
	Arb Mode Int		Clock		Phase: 126.35 deg
3	Cont Clock: 1,000,000.00 Hz					10,000 mV

Figure 7.4-1: Arbitrary Waveform Mode display

1. Int Clock / Ext Clock / Lock Master Lock slave mode

2

5

In this field select the clocking mode for the arbitrary waveform system:

Internal Clock - The sample clock is generated internally. The clock frequency is entered directly via the front panel.

External Clock - The sample clock (40 MHz max) is taken from the External Arb Clock input on the back panel.

*** Warning ***

TTL/CMOS levels (0V to +5V) only.

Lock Master - The unit provides the master timing signals for locking multiple 4070A Arb generators together.

Lock Slave - The unit receives all timing signals from a master unit. Used when locking multiple 4070A Arb’s together. For more information on locking Arb’s together, see the section 7.9.

2. Phase

This field is used during Multiple Unit Locking and only appears when the unit is in Lock Slave mode. It allows you to specify a phase offset of the arbitrary waveform relative to the waveform being generated by the Master Unit. For more information, see section 7.9.

3. Continuous/Triggered mode

In this field select whether the waveform is generated continuously or on a single event basis. If you select Continuous mode, then the waveform is immediately restarted once the last point is reached. If you select a Triggered mode, then the waveform generation is halted after the last point is reached, and the waveform is not restarted again until another trigger occurs. The trigger can come from three sources:

1.Pressing the Trigger key

2.Applying a low-to-high transition on the Ext. Trig In connector

3.Sending an ASCII "T" to the RS-232 port

The 4070A will simultaneously accept a trigger from all of the above sources. To set Continuous-triggering mode, press 1.

To set Triggered mode, press 0.

Pressing any arrow key or rotating the wheel will toggle the run mode between Continuous and Triggered.

4. Clock Frequency

In this field enter the Arbitrary Waveform clock frequency. This is the frequency at which your waveform values are sent to the Digital to Analog converter (DAC). You may enter from 0 Hz (DC) to 40.0 MHz in 0.01 Hz steps.

If a value of 0 Hz is entered, the arbitrary waveform clock is halted.

5. Level

In this field enter the output level, from 4 mVp -p to 10 Vp -p in 1 mV steps. This level is the peak-to-peak voltage swing of the waveform across a 50O loaded, into an open circuit, the voltage swing will be twice the specified peak- to-peak value.

Offset

Enter a DC offset voltage by pressing the Offset key. For more information refer to section 4.4.

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BK Precision 4070A User Manual Rev.2.2