dCS 954 User Manual

Manual for Standard Software Version 1.5x

dCS Ltd

June 2000

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.

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