T.E.M. A07B500S, Manual

Page: 20 / 131

A07B500S manual
Pag. 20
FREQUENCY is the output frequency set in MHz
FORW. PW is the forward output RF power
REFL. PW is the input reflected power on the RF connector
LOCK ON shows that main oscillator is locked the programmed frequency
MODULATION shows the modulation value of the COMPOSITE signal
TEMPERATURE shows the radiator temperature value of the RF power final mosfets
250W BAL shows the unbalance power of the two final coupled amplifiers
Moreover, in the lower part of the display, at the middle there is the indication of the number of
alarms eventually set in the memory which have taken place after the last clearing of the memory.
These ones will be displayed automatically by a continuous enter of
PAGE UP.
If one enters PAGE DOWN in this screen shot, the previous one returns and it will be possible to
see once again the date of the last switching on or to change the mains supply voltage value.
If an alarm is on, always in the same position of the display, the intermitting message
ALARM will
be pointed out.
4.6.4 By entering PAGE UP, it’s possible to see the second screen shot of the most
important measures:
AUDIO LEVEL is the nominal audio signal set on the setting window placed on the
rear panel: if this value doesn't match to the needed one, it’s possible
to choose 0 , 4.1 , 6dBm or, by placing the jumper on
var, it’s
possible to choose a value between –6 and +12dBm.
PREEMPH. 75 is the chosen pre emphasis value, always on the rear window, also the
value 50µs can be selected; the inclusion or the disabling may be
performed by the keyboard in a following screen shot.
AUDIO shows whether the transmitter is set to mono or stereo.
CARRIER EN shows if the output power is enabled either by a keyboard command
or by an external command through the IN/OUT rear connector.
PA VOLTAGE is the supply voltage of the RF power final mosfets.
PA CURRENT is the voltage drained by the mosfet final power.
MAX PW SET is the maximum power value which can be programmed by the
keyboard in the screen shot Forward PW adj (1–500W) to avoid
accidental over drivings of the following amplifiers.
RFL PW SET is the maximum allowed output reflected power. Should this limit be
reached, the direct power will be reduced to keep constant the limit
value of the reflected power (1-50W)