Slave Mode - DCS 992 User Manual

dCS 992 User Manual
dCS Ltd
Calibrate indicator
Menu Set Button
Master/Slave Button
Output Format
6
GPS stands for Global Positioning System
Manual part no: DOC063992 iss 2A1
Contact on + 44 1799 531 999
dCS
(inside the UK replace + 44 with 0)
↑ ↑ ↑ ↑
The button may also be used to step through menu pages. See
Menu on page 18 for details.
This will light up after the unit has been under power for 6 months to warn you
that the calibration guarantee has expired. The unit will continue to operate and
the drift in sample frequency caused by crystal ageing may not be important in
your application. To have your dCS 992 re-calibrated, please contact dCS. You
may be able to re-calibrate your unit locally.
Press the Menu Set button to change a menu option, see
Menu on page 18.
The Master/Slave button sets the clocking mode (master, slave, or learn
modes) , or in the menu acts as the
Outside the menu, pressing it cycles through:
Master ... Slave ... Learn ... Master ...
In Master mode, the calibrated voltage controlled crystal oscillators (TCXOs)
inside the unit generate an accurate sample rate. The LED labelled
be lit to indicate this.
Slave mode - if an accurate standard reference source, such as GPS
an accurate SDIF-2 Word Clock source is available, this may be connected to
the External Sync connector. To slave the unit to the External Reference, press
the Master/Slave button. The unit will attempt to lock to the reference source -
this will take a few seconds. When lock is achieved, the
brightly and the Master
will revert to Master mode, unless it is in ...
Learn mode – press the
incoming reference, but if the reference is lost, the unit carries on at the learnt
frequency.
To return to Master mode, press the
Auto-Slave
If the menu option is turned
when a suitable reference is connected, see
22.
The Master/Slave button is also used to decrement the setting of the
RS232
and the address.
Button
Pressing the Output Format
AES at Double speed and Dual AES at Standard speed, if the sample rate is set
to 88.2 or 96kS/s. In the menu, it also operates as the
x
Menu Set
Menu Down
Down button.
LED will turn off. If the reference source is lost, the unit
Master/Slave button again. This mode slaves to the
Master/Slave
On
Menu Up
button toggles the output format between Single
Page 15
Manual for Software Version 2.0x
January 2001
Entering the
The Software – the
Slave LED will light up
button again.
the unit will automatically slave
A-SL – Autoslave ON/Off, page
Up button.
file 063992ma2a1.pdf available from website
email to: more@dcsltd.co.uk
web site: www.dcsltd.co.uk
Master will
6
source or
Offset