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Audio Precision Introduces B Series APx Analyzers

Flagship audio analyzer nets improved specs and capabilities

Audio Precision has introduced its new APx555 B Series analyzer.

According to AP, the second-generation APx555 offers improved sine generator frequency stability, lower system residual distortion, single-ended, balanced analog output and an optional ADC test mode which provides VBias, a common mode DC bias.

The arrival of the B Series APx555 audio analyzer brings several enhancements to the analog high-performance sine generator that will have broad appeal to

Intended for developers of high-performance audio devices such as compressors, limiters, amplifiers, codecs and digital signal processors, the B Series APx555 audio analyzer includes an enhanced analog generator (EAG) — standard with B Series APx555 analyzers and available as an upgrade for Legacy APx555 systems — providing improvements in its low-distortion sine generator and high-precision sine analyzer, including reported sine generator frequency stability with an accuracy of <30 ppm.

The system can now also generate low-distortion analog sine burst signals from 5 Hz to 100 kHz and allows users to independently invert the signal polarity of balanced channel outputs. Finally, the B Series APx555 has lower system residual distortion, with THD+N improvement above 50 kHz (−2 dB) and THD improvement above 5 kHz (varying from −2 to −5 dB).

The B Series APx555 now offers an ADC Test Mode option capable of generating balanced analog audio signals mixed with a calibrated common mode DC offset voltage — a mode intended for use in testing devices that operate on a single supply voltage and require inputs with a DC bias voltage, such as audio codecs and ADC chips in mobile products. The ADC Test Mode also includes programmable voltage limits to prevent overvoltage damage to the device being tested. This option is included when a Legacy APx555 analyzer receives an EAG upgrade.

Pricing for B Series APx audio analyzers is the same as their legacy APx counterparts. This includes the B Series APx555 with its enhanced analog generator. The EAG factory upgrade for Legacy APx555 analyzers retails for $6,000 and includes version 5.0 software for upgrades ordered by June 28. The ADC Test Mode option is listed at $3,000.

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