User's Manual

8 3 6 A 2 k W UHF Tr a nslat or , I nt erna lly Diple x ed M e t e r s, Sw it ches, I ndica t ors and Sa m ples
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Power. Also reads % Reflect ed Power, Power Supply Voltage
Levels and AGC Volt age Levels.
Switch ( S2) , Met er Select s t he desired % Pow er or t he Voltage reading.
% Output Pwr Reads the % Out put Power of t he Tray, 100% = 600 Wat t s
Peak of Sync Visual + Aural, on top scale.
% Refl (Reflected) Reads t he % Reflect ed Out put Power of t he Tray, < 20% with
all Am plifier Trays operat ing A6, A7, A8 & A9, as m easured on
top scale.
Power Supply Reads the Power Supply Volt age, + 26.5 VDC, on the m iddle
scale.
UHF Am plifier Trays:
N a m e Function
“ M et ering” - Continued
AGC Volt age Reads the AGC Voltage Level, + 1 VDC t o + 3 VDC, on bot t om
scale.
“St a t u s ”
I ndica t ors
Enable ( DS4 Green) I ndicat es t hat an Enable, Operat e Com m and, is applied t o t he
UHF Am plifier Tray from the selected UHF Excit er Tray.
Overdrive ( DS2 Red) Indicat es t hat the level of the drive is too high. The protection
circuit will lim it t he drive to the set t hreshold. The Fault is
generated on the Am plifier Control Board.
VSWR Cut back ( DS1 Red) I ndicat es t hat Reflected Power Level of the Tray has increased
above 50% which will aut om at ically cut back t he Output Power
Level to 20 % . The Fault is generated on the Am plifier Cont rol
Board.
Overtem p (DS3 Red) I ndicat es t hat t he t em perat ure of (A5- A6- A3 & A5- A6- A4) one
or bot h of t wo Therm al Swit ches m ount ed on the heatsink
assem bly for the output am plifiers is above 175 degrees F.
When this Fault occurs t he Enable t o the Swit ching Power
Supply in t he effect ed Am plifier Tray is rem oved im m ediately
and it will shut down.
I nput Fault ( DS5 Red) I ndicat es that t he I nput RF Level t o t he Am plifier Trays
dropped below t he 0 dBm Range.