Benchmark AHB2 Manual de Instruções descarregar pdf (Página 7)

DAC2 DX Instruction Manual Rev A Page 7

Output Calibration Lights

If a CALIBRATION light is on, the corresponding output bus is set to the calibrated maximum

output level and the volume control is bypassed (BYPASS mode).

If a CALIBRATION light is flashing slowly, the corresponding output bus is set to BYPASS mode,

but the output is muted or dimmed.

 A - AUX analog output bus is in BYPASS

 M – MAIN analog output bus is in BYPASS

NOTE: If a bus is not in bypass mode, the corresponding CALIBRATION light will flash rapidly

when the volume control is adjusted. This feature shows which busses are being adjusted.

Word Length Display

The DAC2 monitors bit activity to determine the input word length. This gives an accurate

indication even when status bits are set incorrectly.

 24 – The word length is 24-bits.

 16 – The word length is 16-bits.

 16 & 24 – The word length is 17 to 23 bits.

 None - No input, DSD, or word length less than 16 bits.

Sample Rate Display

The DAC2 measures the incoming sample rate and uses 4 lights to indicate the rate and format.

 44.1 – Sample rate is 44.1 kHz

 48 – Sample rate is 48 kHz

 44.1 & 2X – Sample rate is 88.2 kHz

 48 & 2X – Sample rate is 96 kHz

 44.1 & 4X – Sample rate is 176.4 kHz

 48 & 4X – Sample rate is 192 kHz

 2X & 4X – DSD

Headphone Jacks

The headphone jacks are driven by Benchmark’s “zero-Ohm” HPA2™ headphone power amplifier.

Both jacks can be used simultaneously. Both jacks are equipped with switches that can be

programmed to mute the MAIN audio output bus when headphones are inserted. By default, the

left headphone jack is programmed to mute the MAIN output bus while the right jack will not mute

the audio. Internal jumpers can be moved to enable or disable the headphone switches. Other

internal jumpers can be moved to adjust the headphone gain range.

Volume Control

The volume control is a motor-driven rotary potentiometer. The position of the control sets the 32-

bit digital attenuation. Audio does not pass through the potentiometer.

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Benchmark AHB2 Manual de Instruções Página 7