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dCS 954 User Manual Manual for Standard Software Version 1.5x
dCS Ltd June 2000
Manual part no: DOC136954 iss 2B1
Page 24
file 135954ma2b1.pdf available from website
Contact
dCS
on + 44 1799 531 999 email to: more@dcsltd.co.uk
(inside the UK replace + 44 with 0) web site: www.dcsltd.co.uk
Tone -
(Tone Generator). This controls an internal Tone Generator, whose level and
frequency can be adjusted. Pressing
Set enters a submenu, which accesses
the following functions:
Level The output level in dB0. It can be changed in 0.1dB
steps using the
Up and Down buttons. Press Set
to accept the change. The rate of change
accelerates if the button is held down. The range is
from 0dB0 to –120dB0.
Freq The output frequency, in kHz. It can be changed by
using the
Up and Down buttons. Press Set to
accept the change. The rate of change accelerates
if the button is held down. The step size becomes
progressively smaller below 1kHz.
On/Off Toggles whether the Generator is on or off.
Up Allows the menu to be re-entered to set other
functions. Alternatively, if left, the menu will just
time out, keeping the last settings.
The frequency range is from 1Hz to 99kHz but the level rolls off at the extremes,
due to anti-image filters in the analogue circuitry. The Generator output level is
within –0.1dB from less than 10Hz up to 50kHz.
The Tone Generator works standalone, without a digital input. If locked, the unit
will be unlocked when the Generator is turned on. At power up, the Generator is
always set to Off, 1kHz and –18dB0 – this is a safety measure.
If very fine frequency resolution is wanted, RS-232 control will give mHz
frequency resolution. See section “RS-232 Remote Control Interface” starting
on page 56.
The tone generator is very pure – it is a good analogue source.
IMPORTANT!
To avoid damage to your ears, loudspeakers and power amplifiers, use the
Tone Generator with care .
Sys -
System phase check. This turns on a full-scale test signal for checking absolute
output phase on an oscilloscope.
IMPORTANT!
To avoid damage to your ears, loudspeakers and power amplifiers, use the
Sys
option with care . Turn your system volume level well down before using
this feature!
Turn this option On, the display will flash Sys On and the waveforms shown
below will appear on the analogue outputs. The top waveform is from the left
channel, the bottom is from the right.