dk 477-200A Manual del usuario - Página 5

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Remote Control.

All the functions of the front buttons are available through the 9pole D connector remote control connector.

Previous users of the NTP477-series instrument will find the same possibilities in this 477-100 series although the

needed external connections have changed.

In addition to the remote control of operating functions (i.e. "Disp. Peak"), also a number of operating parameters (i.e.

ref. level) can be programmed externally.

Restricting the number of control inputs to just four prohibits the use of simple external on/off connections. Instead

specific resistance values must be used in series with the external switches/connections. The switches "common side"

must all be connected to GND (Pin 4).

Remote Control input 1 (RC#1)

This input facilitates an alternative way of controlling the PPM reference level. If this input is left open the reference

level is set as described under Operating Parameter Settings . If however a resistor is connected to 0V the preset

reference level will be overruled. The resistor value required to obtain a given reference level can be found in table 1. It

may be necessary to use resistors in parallel or series to obtain a specific value to within +/-2%

Table 1.

Reference

level

Reserved

0 dB FS

-1 dB FS

-2 dB FS

-3 dB FS

-4 dB FS

-5 dB FS

-6 dB FS

-7 dB FS

-8 dB FS

-9 dB FS

-10 dB FS

-11dB FS

-12 dB FS

-13 dB FS

-14 dB FS

-15 dB FS

Remote Control input 2 (RC#2)

This input is reserved for controlling the reference level loudness mode. (Not implemented in this version)

Remote Control input (RC#3) is reserved for future use.

20030929

Resistor

Reference

value (ohms)

level

-16 dB FS

313

-17 dB FS

645

-18 dB FS

1000

-19 dB FS

1379

-20 dB FS

1786

-21 dB FS

2222

-22 dB FS

2692

-23 dB FS

3200

-24 dB FS

3750

-25 dB FS

4348

-26 dB FS

5000

-27 dB FS

5714

-28 dB FS

6500

-29 dB FS

7368

-30 dB FS

8333

-31 dB FS

9412

Preset level

Resistor

value (ohms)

10625

12000

13571

15385

17500

20000

23000

26667

31250

37143

45000

56000

72500

100000

155000

320000

N.C.

Document no. 477-2010A page 5 of 5