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Model 7410
AC Voltage Reference
A Calculable, Transportable AC Reference Traceable to DC Voltage Standards
G uildline Model 7410 AC Voltage Reference is a digitally
synthesized AC voltage source. It provides 16 Multiple
waveform shapes at 16 different frequencies, and at 5
different voltage levels.
Precision waveforms stored in non-volatile memory are
generated using new technology developed at The
National Institute of Standards and Technology (NIST).
The model 7410 utilizes two Digital to Analogue Converters
(DACs) to generate extremely stable AC Analogue
waveforms at frequencies of up to 20 kHz. Up to 512 DC
steps are used to generate the output waveform.
In operation, data stored in the non-volatile memory for a
given waveform is sent alternatively to each of the two
DACs. One DAC is set using bytes on all even addresses,
while the other is set using all odd addresses. The output
of each DAC is time-multiplexed to the output amplifier so
that the output of the first DAC is being used to drive the
output, while the output of the second DAC is being
changed to its pre-programmed next step. By multiplexing
the two DACs in this manner, step noise is reduced,
7410 FEATURES resulting in the highest accuracy/stability RMS voltage
The 7410 is a precision AC Reference that
> Precision AC Reference can be referenced directly to DC voltage
> Calibration referenced to DC SOURCE standards.
> 16 different frequencies
> 16 selectable waveforms Versatility designed into this innovative AC Voltage
> External sensing Reference enables the use of an external 10V DC Solid
State Reference as the DC reference for the DACs, instead
> Voltage range 1 mV to 7.07 V of the 7410's own internal 10V DC Reference.
> 100mA Output Current An optional attenuator, Guildline Model 74101, has been
designed for those applications and requirements where a
> Thermal converter calibration lower output is needed. The ranges provided are 1mV,
> Ease of use 10mV, 100mV and 1V. This expands the range of use for
the 7410 AC Voltage Reference significantly.
Calibration of the 7410 AC Voltage Reference is easily
accomplished utilizing a precision DC Voltmeter and a
computer.
The standard equipment software supplied enables fast
and efficient calibration of the instrument.
After calibration, the typical total stability of the 7.07 RMS
output is better than 10 ppm over the frequency range
0.1 Hz to 1 kHz and 25 ppm to 10 kHz.
The 7410 is based on the original work performed at the
National Institute of Standards and Technology, (NIST)
7410 AC Voltage Reference
7410 Specifications
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