MSB Technology DAC IV plus, Руководство пользователя

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Bit-Perfect Source Testing
Perhaps one of the most useful features of the software is the bit-perfect test. The following series of files can be downloaded from the
MSB web site:
16 bit x 44.1 kHz sample rate file (CD standard). 24 bit x 44.1 kHz sample rate file.
16 bit x 48 kHz sample rate file. 24 bit x 48 kHz sample rate file.
16 bit x 88.2 kHz sample rate file. 24 bit x 88.2 kHz sample rate file.
16 bit x 96 kHz sample rate file. 24 bit x 96 kHz sample rate file.
16 bit x 176.4 kHz sample rate file. 24 bit x 176.4 kHz sample rate file.
16 bit x 192 kHz sample rate file. 24 bit x 192 kHz sample rate file.
They are .wav test files that when played, will be identified by the DAC IV and checked, and will be reported on the display if they are
bit-perfect. If there is a problem with the test, it will play but the display will not indicate any change. Be sure upsampling is turned off in
any transport as this prevents a file from remaining bit-perfect. This system will allow you to easily test your source, especially computer
sources to see if all your settings are correct. There are files at all sample rates for both 16 bit and 24 bit operation. The 16 bit 44.1 test
file can be burned to a CD to test transports.
Troubleshooting
No Input Frequency indicated on Display (reads “No Signal”) - This means no input is detected. Check input select. Change to auto mode to be
sure. Check for bad cable, or cable plugged into the wrong output on the transport.
No Input Bit Depth indicated on Display (reads “0 bits”) - This means an input is detected but the music is not playing. Check the source to be sure
it is playing.
No sound but Display indicates frequency and bit depth
- Check that power cable is plugged in all the way. You may have digital power but no
analog power. Check that source is valid audio source. Change to a standard CD just to be sure. Check that analog outputs are connected properly.
Check that volume is turned up. If using Balanced output, check Single-End or Balanced menu setting. Balanced output will be silent if set to Single-
Ended mode.
Still no sound - connect an analog output from the source directly to the preamp input. Verify that the rest of the system is working. Now move the
same analog cable to the DAC and plug in the analog source to the analog inputs. Verify the DAC pass-through is working. Now plug in a digital
source. You should hear a click and the front display should indicate frequency.
You hear audio clipping (with outboard preamp)
- the output level may be too high for your preamp. Check the input specifications on your preamp.
(See Platinum specs). If you do not have the volume option, go to the DAC LEVEL setup menu and reduce the DAC output to -9 dB. This reduced
level should solve the problem.
Frequency readout is off - The Platinum shows the actual input frequency as well as the upsampled frequency. Check your source settings.
High sample rate source indicates 48 kHz on front panel - Check setup menu of source. Many products downmix to 48 k.
DVD-A source does not indicates 192 k - DVD-A players must be upgraded to provide a true 192K output. Production players downmix to 48K.
Many DVD-A disks are produced in 44.1, 48 and 96 k as well.
DC on output when power is off - If the second Analog input option has been installed, the output is connected to the 2nd input when the power is
turned off. Terminate the input when not used to avoid an open input to the AMP.
USB input not working right
- Our USB1 input is limited to 48K 24 bit sources. Check your many computer settings. Our USB2 is limited to 192K
and our USB2 Signature is limited to 384K. Check your computer settings. This is much harder than you would think. With many operating systems
you may need to make small changes to the instructions. As ALWAYS with everything computer - Restart. Power off the computer and DAC and start
over if anything is acting strange. Second thing is to change your USB cable. Audiophile USB cables rarely work at high sample rates. Try a cheap
printer cable.
PRO Input is not working - Make sure you are not mixing a PRO I2S input and a MSB Network input. They are not compatible and will not work.
Make sure you have the latest firmware.
Analog Input not selectable
- This input defaults OFF. Go into the menus and turn on the Analog Input.
Warranty
All MSB products carry a one year warranty in the country of origin although extended warranties are offered in many countries. No returns accepted
without an RMA. All units must be returned to the distributor in the country of origin. The DAC displays the distributor in the “about” tab of the menu.
The power base has the distributor and country printed on the box. MSB will not make warranty repairs on grey market products. Be sure the product
you purchased is authorized to be in your country. Upon receipt, MSB will repair or replace any defective product. All product shipped FOB Aptos.
Shipping and shipping damage is the responsibility of the consignee.