Power Combiner; Loads Bank - Hitachi EC701HP Operation Manual

Section 1 - Introduction (UHF Digital TV Transmitters)
E-Compact - Air Cooling - ATSC - High Power

1.4.5.5 Power Combiner

This module is a passive RF combiner N doors constructed with hybrid couplers, which is a
combination of N: 1
power.
This combiner has loads of unbalance, located in the loads drawer.

1.4.5.6 Loads Bank

It is a drawer where loads of unbalance of the power combiner are packed, there are different
models according to the number of loads.
There are five models of load bank of drawers:
 056402 - MOD GV 40041 DL0K5W EC702HP
 056395 - MOD GV 40040 DL1K0W EC703HP
 055356 - MOD GV 40027 DL1K9W EC704HP
 059323 - MOD GV 40082 DL4K3W EC706HP
 056402 - MOD GV 40081 DL5K1W EC708HP
Figure 1-11 - Loads Drawer (Fans
accessible through front panel).
( * 5) Note: N represents the number of transmitter drawers.
Manual Rev. 0.1 - February 2018
(*5)
from the output of the N power drawers, thus obtaining the final transmitter
Figure 1-10 - Combiner
(UHF Hybrid Coupler - MC3Q40C model -
used in the EC703HP transmitter)
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