TEX100
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User Manual
Rev. 4.0 - 18/07/03
9.5
Meter Card
This card is situated centrally on the front panel.
The card receives forward and reflected power signals from the power supply which,
in turn, come from the final power stage. The stereo encoder card supplies deviation
and left and right signal levels. These signal levels are normalized then displayed on
the analog meter according to the position of the rotary selector situated on the front
panel.
9.6
Frequency Selector Card (Contraves)
This card is fixed to the left-hand side of the front panel.
The operating frequency selected by the frequency control is represented by a signal
which is supplied to the frequency dividers that form part of the PLL circuits found on
the PLL card.
9.7
Alarms Card
This card is fixed in the lower part of the unit.
This circuit contains an rotative selector that allows to adjust, through 7 trimmers, the
threeshold of the external and internal output level, internal and external SWR level,
temperature and to preset the maximum value of the output power.
In case of fault there isn't an automatic reset, because the transmitter provides to
decrease the output power to continue the transmission without stops, even if at
minimum power.
9.8
Mono/MPX Coder Card (mono version)
This card is fixed in the lower part of the unit.
The Mono\MPX card is an Audio Mixer at four inputs, two balanced (Mono and MPX)
and two unbalanced (SCA1 and SCA2).
Mono and MPX input level can be setted through relative switches placed on front
panel, on 5 fixed positions and on a variable position from -12dBm to +9dBm
(presetted at 0dBm).
It's possible to set the pre-enphasis value at 50µS, 75µS or linear. Then, it's possible
to insert or remove a low pass filter at 15KHz.
Summary of Contents for TEX100
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