Antelope Isochrone OCX-V Owner's Manual - page 4

The DA mode will not work if the SOURCE knob is set to VIDEO or OVEN, as there is no 

audio reference to distribute. In this case the red LED above SAMPLE RATE knob will 

flash. Note that in the DA mode, the OCX-V can work with non-standard sample rates as 

may occur in vari-speed mode; any sample rate from 30 to 202 kHz is acceptable. 

Pull up / Pull down Buttons

These buttons are used to modify the outgoing sample rate chosen with the SAMPLE 

RATE knob.  The first button accommodates the United States pull up / pull down standard, 

increasing or decreasing the selected sample rate by 0.1 %. The second button 

accommodates the European pull up/ pull down standard, increasing or decreasing the 

selected sample rate by 4 %.

The rectangular LEDs above each button indicate whether the frequency is pulled up (+), 

pulled down (-) , or not modified (0) by its corresponding button.  You can always use the 

Frequency Display window to see the actual frequency the unit outputs, with the pull ups / 

pull downs selected at the moment.

Note that pull up / pull down feature is disabled when the SAMPLE RATE switch is set to 

DA.

Frequency Display

Displays the sample rate outputted by the Word Clock, AES / EBU and S/PDIF outputs.  

Word Clock outputs 7 and 8 are capable of providing fractional frequencies different from 

the one displayed here. When the output frequency can not be generated during some 

error conditions, the display will show "------".

Contrast Knob

Adjusts the contrast of the frequency display.

Status LEDs

LOCK , when lit indicates that the OCX-V is locked to a valid incoming reference.

ATOMIC, when lit, indicates that the OCX-V is slaving to external atomic clock.  

OVEN, will flash when the OCX-V is first turned on, until the oven reaches its temperature 

of operation.  Once this temperature is achieved, the light will remain lit. 

NTSC / PAL, will be lit if SOURCE is set to VIDEO, and the incoming video signal is either 

NTSC or PAL format. 

HDTV, will be lit if SOURCE is set to VIDEO, and the incoming video signal is  a valid 

HDTV format. See Appendix B for a a list of the supported HDTV formats.

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