20030929
Document no. 477-2010A page 5 of 5
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 /-2%
Table 1.
Reference
Resistor Reference Resistor
level
value (ohms)
level
value (ohms)
Reserved
0
-16 dB FS
10625
0 dB FS
313
-17 dB FS
12000
-1 dB FS
645
-18 dB FS
13571
-2 dB FS
1000
-19 dB FS
15385
-3 dB FS
1379
-20 dB FS
17500
-4 dB FS
1786
-21 dB FS
20000
-5 dB FS
2222
-22 dB FS
23000
-6 dB FS
2692
-23 dB FS
26667
-7 dB FS
3200
-24 dB FS
31250
-8 dB FS
3750
-25 dB FS
37143
-9 dB FS
4348
-26 dB FS
45000
-10 dB FS
5000
-27 dB FS
56000
-11dB FS
5714
-28 dB FS
72500
-12 dB FS
6500
-29 dB FS
100000
-13 dB FS
7368
-30 dB FS
155000
-14 dB FS
8333
-31 dB FS
320000
-15 dB FS
9412
Preset level
N.C.
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.
