NTP 297-3601-316
08.01
August 2006
For Generic 602.20
3-20 Switch settings for balance networks
Figure 3-4:
QNB65B Balance Network - switch locations
Table 3-M:
QNB65B Balance Network - switch settings for 19-gauge end-section non-loaded cable without
impedance compensator at far end of cable
Length
Resistance
Capacitance
Ft X 1000
Meters
R1
R2
Capacitance
Value (
µ
F)
SR Switches
1
2
3
4
5
6-7
1829-2134
5.5
0
0.27
0
0
1
1
0
7-9
2134-2743
4
0
0.23
0
0
0
1
0
9-11
2743-3353
2.5
1
0.17
0
1
0
0
0
11-13
3353-3962
5
1
0.17
0
1
0
0
0
13-15
3962-4572
1.5
1
0.17
0
1
0
0
0
15-17
4572-5182
1.5
1
0.19
0
0
1
0
0
17-19
5182-5791
1.5
2
0.23
0
0
0
1
0
Arrow
R1 Resistance
SR Capacitance
R2 Resistance
Position Marker
Note: To adjust the R1 or R2 potentiometer, turn the dial clockwise until it reaches a
mechanical stop. Note the position of the arrow at the end of the slot; this is the full-
clockwise position. The dial is now ready to be adjusted. To do so, turn the dial
counterclockwise by the number of position markers specified in the appropriate table.
