Triax GNS 20 Operating Instructions Manual page 7

Setting possibilities
The Multiband amplifiers GNS have the following
setting possibilities:
Level adjuster,
at all inputs
Power supply for the
connected terrestrial
antennas
input UHF
input VHFIII
Combining the inputs
UHF and VHFIII, e.g.
when using combination
antennas
Option:
Power supply for the
combined inputs UHF
+ VHFIII (with additional
jumper, not included)
Settings are done as follows:
1. Remove the housing lid:
After slackening the central bolt (a) lift the lid
off by releasing the catch on the left-hand
side (b).
For adjustments now the level adjusters and
the jumper on the circuit board are accessible.
Fig. 1 Housing
b
Default
setting
0...20 dB 0 dB
0 / +5 V 0 V
0 / +5 V 0 V
off/on off
0 / +5V -
above
a
Fig. 2 Adjuster elements
- Level adjuster 0...-20 dB at all inputs
- Position of the jumper:
Level adjusters at all
Jumper
inputs
2. Adjuster elements
no power supply
for terrestrial antenna
(Default setting)
+5V power supply
at UHF
+5V power supply
at VHFIII
no power supply
UHF + VHFIII common at input UHF
UHF + VHFIII common at input UHF
+5V power supply
3. close the housing lid:
Put the housing lid on the housing and press
all the way round. The sheet steel segments
will now be pressed against the inner wall of
the housing. Screw in the central screw.
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