Pll Settings - Lavry DA10 User Manual

LavryBlack DA10 Operation
- When the PLL mode is set to narrow or crystal and the DA10 receives a valid input signal, both
the "lock" lamp and the sample rate indicator that corresponds to the input's sample frequency
illuminate. The input must have a sample frequency of 44.1, 48, 88.2, or 96 kHz.
- In wide PLL mode, all four sample frequency indicators illuminate to indicate the DA10 will
accept inputs with a sample frequency between 32 and 200 kHz. The "lock" lamp illuminates
when the DA10 is locked to a valid signal.
B. PLL SETTINGS:
- Use crystal or narrow settings for 44.1, 48, 88.2 and 96 kHz rates for optimum jitter rejection.
Crystal mode offers the highest level of jitter rejection, but narrow mode offers excellent jitter
rejection as well.
- Use wide for all other sample frequencies between 30kHz and 200kHz.
It is advisable to select the PLL mode (crystal, narrow, or wide) before turning the DA10 "ON."
Changing between crystal, narrow and wide while the power is ON may cause the DA10 to take
up to 50 seconds to reach optimal performance. Although audio is being reproduced after the
setting has been changed, the quality of the audio may improve over this period.
C. AVOIDING CLICKS:
The DA10 provides protection against its own "AC power ON clicks".
The DA10 CANNOT protect against "power ON clicks or pops" from digital sources feeding the
DA10. ALWAYS apply AC power to digital sources connected to the DA10 before applying AC
power to the DA10, or reduce the volume to "00" before applying power to, or changing operating
modes of the digital source.
- The volume setting is "non-volatile" and is stored when you turn the AC power "OFF." For this
reason, it is advisable to reduce the volume to a low setting or "mute" (00) before turning the AC
power "OFF" in systems where the DA10 is connected directly to power amps or powered
speakers.
- It is also advisable to apply AC power to the power amp or power monitors after the DA10 is
turned "on" when feeding them directly from the XLR outputs of the DA10 (no preamp or volume
control between the DA10 and power amps). Conversely, it is advisable to remove AC power
from the power amp or powered monitors prior to turning the DA10 "Off."
Although care has been taken to minimize the possibility, switching between input sources (xlr,
rca, or optical) and PLL modes (wide, narrow or crystal) during operation may cause unwanted
clicks, especially when the signal is loud.
D. MODE and POLARITY SETTINGS:
Either stereo or mono, and normal or invert can be selected at any time during operation.
-MONO mode is provided for monitoring the "mono compatibility" of a mix, and is most often used
in professional recording applications. The MONO signal is the AVERAGE (sum divided by 2) of
the Left and Right signals. This approach helps to preserve the perceived volume level when
switching between stereo and mono while listening to typical stereo music program.
- The POLARITY switch affects the Polarity of both the main XLR outputs and the headphone
output and is labeled "normal" and "invert."
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