Bnc 645 User Manual download pdf (Page 125)

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B.2 Output Data Formats

Output data will be in one of formats shown in the table below.

Type of Output Data Output Data Format

Non-reading queries < 80 ASCII character string

Single reading (IEEE-488) SD.DDDDDDDDESDD<nl>

Multiple readings (IEEE-488) SD.DDDDDDDDESDD,...,...,<nl>

S Negative sign or positive sign

D Numeric digits

E Exponent

<nl> newline character

<cr> carriage return character

B.3 Command Reference

-- A to F --

-- A --

AM:INTernal

:FUNCtion{SINusoid|SQUare|RAMP|NRAMP|TRIangle|NOISe|USER}

Specify the modulating waveform for the modulation. This applies only when the

modulating source is internal. Noise can be a modulating waveform, but cannot

be used as a carrier waveform, neither do Pulse nor dc. The default modulating

waveform is a sine waveform.

AM:INTernal

:FUNCtion?

Query the modulating function in amplitude modulation. “SIN”, “SQU”, “RAMP”,

“NRAM”, “TRI”, “NOIS” or ”USER” string indicating the modulating function will

be returned.

-- Square waveform has 50% duty cycle.

--Ramp waveform has 100% symmetry

--Triangle waveform has 50% symmetry.

--Negative Ramp waveform has 0% symmetry.

--If an Arbitrary(USER) waveform is chosen to be the modulating waveform, it is

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Bnc 645 User Manual Page 125