20/20 AD User Guide | Using the 20/20 AD |
The 20/20 AD is shipped configured for Internal mode. To operate in External mode, press EXT SYNC until the desired sync source (WC or AES) lights. If the selected sync source light flashes and the PRES light is not on, it indicates that there is no signal present as a sync source. If the selected sync source and PRES lights are on, but the LOCK light is off, the selected sync source is present, but is not within the
External Mode
EXT SYNC
| WC | AES |
AES / WC: | PRES | LOCK |
Internal and External modes
With WC selected as the external sync source, the front panel SAMPLE RATE switch determines the setting of the AES and S/PDIF Channel Status sample rate bits, not the actual sample rate, which tracks the external sync source. It is important to make sure that the sample rate selected at the front panel agrees with the external sync source, as some digital tape recorders determine sample rate from the Channel Status bits rather than from the actual sample rate.
External Mode Error
States
| WC | EXT SYNC |
| AES | |
AES / WC: | PRES | LOCK |
|
|
|
|
|
|
| WC | EXT SYNC |
| AES | |
AES / WC: | PRES | LOCK |
|
|
|
To operate in Internal mode, press EXT SYNC until the WC and AES lights are both off. Then press SAMPLE RATE until the desired sample rate lights. In Internal mode, the PRES light indicates that either WC or AES is available as an external sync source.
Internal Mode
EXT SYNC
| WC | AES |
AES / WC: | PRES | LOCK |
15