MT-MR PLATINUM. POINT TO POINT AURAL RADIO RELAY SYSTEM
APPENDIX I.
Measurements of polarization voltages and currents in the amplifying
modules of MT PLATINUM transmitter depending on the working frequency.
Driver PD55003
FREQUENCY
POLARIZATION VOLTAGE
[V]
CURRENT [A]
200MHz
2.5 – 2.7
0.70
300MHz
2.5 – 2.7
0.75
400MHz
2.7 – 2.9
0.80
950MHz
3.3 – 3.5
0.82
Final stage PD55025
FREQUENCY
POLARIZATION
VOLTAGE [V]
CURRENT @ 10W
[A]
CURRENT @ 20W
[A]
200MHz
0.2 – 0.5
1.7 – 2.0
2.3 – 2.5
300MHz
0.3 – 0.6
1.8 – 2.2
2.6 – 2.7
400MHz
0.5 – 0.7
1.9 – 2.3
2.7 – 2.8
950MHz
0.7 – 0.9
1.9 – 2.4
NOT USED
In order to regulate the return, put a 25
Ω
load (or two 50
Ω
loads with a T, type N or BNC ) and adjust the RFL
instrument until you read the value offered by the wattmeter; with 2 – 3W of Reflected Power (
≈
10% of forward
power) the protection regulator is adjusted at the intervention limit.
