B&K Precision 4079 - Manual - Manual (Page 103)

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- Select F2 – FROM, press key 1 and ENTER
- Select F2 – DATA, press key 0 and ENTER
- Select F5 – EXEC
- Select F3 – YES
- Select F5 – PREV
- Select F3 – MARK
- Select F4 – ON
7. CHECK for a pulse with a 1us width and with 0V and >4V levels on the oscilloscope.
5.3.9 External Modulation
Specification: 5 Vp-p for 100% AM modulation.
Procedure:
4
Connect the OUTPUT connector to the oscilloscope input using a 50 ohm coaxial cable and a
50 ohm feedthrough termination.
5 Set the unit to generate a sine waveform with 1 KHz frequency and 5 Vp-p output.
6 Connect the external function generator to the MODULATION IN of the unit.
Use a coax cable with 50 ohm feedthrough termination.
4. Set the external function generator for a sine wave output with 400 Hz frequency and 3Vp-p
output.
5. On the unit select MODUL and then F1- AM, again F1- ON and then F5 - EXT
4
CHECK on the oscilloscope for an amplitude modulated waveform that is changing the
modulation depth by changing the external generator output amplitude.
5.3.10 GPIB Capability
1. Connect the waveform generator to a controller. Each side of this connection must be fitted with a
proper IEEE-488 interface.
2. Operate the waveform generator through the controller. This assumes that you have some
experience in programming the controller and are familiar with GPIB operation. For more
information on GPIB programming, see Section 4, Programming