Nortel 600 Series Manual page 156

3-20 Switch settings for balance networks
Figure 3-4: QNB65B Balance Network - switch locations
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.
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
Ft X 1000 Meters
6-7 1829-2134
7-9 2134-2743
9-11 2743-3353
11-13 3353-3962
13-15 3962-4572
15-17 4572-5182
17-19 5182-5791
NTP 297-3601-316
Position Marker
Arrow
Resistance
R1 R2
5.5 0
4 0
2.5 1
5 1
1.5 1
1.5 1
1.5 2
08.01
For Generic 602.20
R1 Resistance
SR Capacitance
R2 Resistance
Capacitance
Capacitance SR Switches
Value (µF) 1
0.27 0
0.23 0
0.17 0
0.17 0
0.17 0
0.19 0
0.23 0
2 3 4 5
0 1 1 0
0 0 1 0
1 0 0 0
1 0 0 0
1 0 0 0
0 1 0 0
0 0 1 0
August 2006