User's Manual

300-Watt Digital UHF Transmitter Chapter 2, System Description
DT830A, Rev. 1 2-6
Table 2-9. UHF Exciter Tray Samples
SAMPLE DESCRIPTION
f(s)
A sample of the channel oscillator output,
taken from the sample jack of the channel
oscillator assembly
Exciter O/P
An output power sample of the exciter
taken from the UHF upconverter board
Transmitter O/P
A forward power sample of the transmitter
taken from the visual/aural metering board
before the signal reaches the bandpass
filter
2.2.3 (A6 and A7) UHF Amplifier Trays (1294-1112 Low Band, 1294-1113 Mid
Band or 1294-1114 High Band ; Appendix C)
Table 2-10. UHF Amplifier Tray Meters
METER FUNCTION
Meter (A6)
Reads power in terms of a percent of the
calibrated power output value. A full-scale
reading is 100%, which is equivalent to the
full-rated 300 watts of average power. Also
reads % Reflected Power, power supply,
and AGC voltage levels.
Switch (S2), meter
Selects the desired % Power or the voltage
reading
% Output pwr Displays the % Output Power of the tray
% Refl (Reflected)
Displays the % Reflected Output Power of
the tray, <10% on the top scale
Power supply
Reads the power supply voltage, +26.5
VDC, on middle scale
AGC voltage
Reads the AGC voltage level, +1 to +2
VDC, on the bottom scale