dk 477-200A Gebruikershandleiding - Pagina 6

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Remote Control input 4 (RC#4)

This input is designed to substitute all the functions also accessible as push buttons on the front of the instrument. The

remote switches must have momentary action and a series resistor according to table 3 must be used.

The switches "common side" must all be connected to GND (Pin 3).

Table 3

Function

Additional Gain

Integration time. Fast/Normal

Mode

Zoom

Display max.

Clear max.

Technical specifications.

Supply voltage......................................................................20-32 V dc or 18V ac

Current consumption, @ 24V supply ...................................160 mA typ. (Max. 220 mA)

Signal input:

Input type .............................................................................Serial digital audio interface (IEC 958/AES3)

Input impedance ...................................................................High impedance, floating, (Zi > 1 kΩ) or 110 ohms

Minimum input signal ..........................................................Vmin = 200 mV, Tmin = 0.5 x Tnom (IEC 958)

Sampling rates......................................................................48 kHz, 44.1 kHz and 96 kHz

Measuring characteristics:

Main reading (bar graph):

Integration time ....................................................................5/10 ms (IEC 268-10, 1991-03)

Return time...........................................................................1.7 s ± 0,3 s (0 to - 20 dB) (IEC 268-10, 1991-03)

Reference level ....................................................................selectable 0 to 31 dB below max. digital code.

Overload indication .............................................................the bar intensity is increased within overload range.

Low frequency cut-off .........................................................DC-blocking; Cut-off frequency <0.3 Hz

Secondary reading (spot):

Integration time ...................................................................."zero"

Return time...........................................................................1.7 s ± 0,3 s (0 to - 20 dB) (IEC 268-10, 1991-03).

Scale max. ...........................................................................Scale max. equals the lower limit of intensified bar range.

Reference level ....................................................................Scale max. corresponds to max. digital code level.

Phase indication:(option) ....................................................0 to 180°. - Resolution: 18°.

Additional functions:

Gain:

Additional 20 dB gain selectable on front.

Mode

The Bar-Graph display can be operated in various modes. Pls. refer to the "Operating instructions"

Memory:

A peak memory is provided. Reset is controlled from a push-button on the front.

Zoom:

To enable extremely accurate reading around "0 dB", the scale may be expanded by a factor of 10.

LED Indicators:

Flashing LEDs on top of each bar for instantaneous digital overload.

Excessive DC-content in either channel.

Gain, when selected.

Sampling rate and preemphasis, if present.

Remote overload indication.

Output for remote overload indication is accessible through the 9-pole D-sub connector. The output is an open collector

in series with an internal 2.2 k Ω resistor. The output is common to both channels.

20030929

Resistor

value (ohms)

645

1379

2222

3200

4348

Document no. 477-2010A page 6 of 6