Pacific Microsonics HDCD Model Two - A;D Reference Clock Menu

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INC.

PACIFIC MICROSONICS

Reference

Model Two HDCD

User’s Manual

Rev. C - January 2002

The A/D REF clock mode is displayed on the top right of the menu and is set using the

Reference Clock Menu, selected by function button #1 (REFCLK). Button #2 (HDCDBIT)

selects the Monitor Input HDCD Code Detect Menu, button #3 (MON_REF) selects the

Monitor Reference Clock Menu, button #4 (REF_FRQ) selects the External Ref Clock Fre-

quency Menu, button #5 (FORMAT) selects the Monitor Digital Input Format Menu. Descrip-

tions of these menus are on pages 53, 54 and 55. In 176.4 kHz (4_X) AD mode the Analog

Input Menu is the same as in 88.2 kHz AD mode except that function button #5 (FORMAT)

is deleted.

A/D Reference Clock Menu

In all AD modes, the A/D Reference Clock Menu is reached from the Operating Menu by

selecting (SETUP/ INPUT/REFCLK).

Function buttons 1-5 select the A/D converter reference clock source. Button #1 (INTERN)

selects the A/D converter’s internal clock, which should always be used unless an external

reference is required, button #2 (REF_AES) selects the clock connected to the AES In Ref

input, button #3 (REFWCLK) selects the clock connected to the Word Clock Ref connector,

button #4 (DIG_IN) selects the digital input data source connected to the AES In 1 input,

and button #5 (MASTER) both selects the internal clock and feeds it to the Word Clock Ref

connector which then provides a master clock output that can be “daisy-chained” through

additional Model Twos for synchronous multichannel A/D conversion. Pressing ENTER acti-

vates the selection. The selected reference clock mode is displayed in the top right of the

Analog Input Menu.

CAUTION: Do not select an external source for the reference clock input if it is de-

rived from the output of the Model Two. This will create a circular reference clock

effect and may result in synchronization drift.

A/D Filter Mode Menu

In 44.1 kHz (1_X) AD modes, the A/D Filter Mode Menu is reached from the Operating

Menu by selecting (SETUP/INPUT/AD_MODE).