Using the front panel display and buttons, set the desired transmission
frequency.
Power down the unit, wait a few seconds and, whilst pressing
ENTER for 5 seconds, power up the unit. After a short while, the
currently set frequency will appear on the display. Use the UP
and DOWN buttons to select the desired frequency. Press
ENTER to store. The new frequency will flash rapidly to indicate
that it is now stored. The unit will begin its boot process and,
after a few seconds the display will return to normal mode, and
the transmitter will begin broadcasting.
The factory will have set the deviation, RDS and pilot injection levels.
They should need no further adjustment. However, if absolutely
necessary, these can be changed as follows (NOT recommended):
To adjust the deviation level, use a suitable trimmer tool
carefully adjust the front panel “DEV ADJ”. This is a single turn
control. The level can be varied by approximately ±10%. Pilot
and RDS subcarrier levels will also change.
To adjust the RDS injection level, locate the circuit board
“MPX/RDS” on the inside rear panel. Adjust trimmer “VR1 (RDS)”
to set the desired RDS injection level. This is a multiturn control.
ELECTRIC SHOCK AND RF BURN HAZARD! DISCONNECT THE
POWER BEFORE REMOVING ANY COVERS.
Take GREAT CARE not to adjust any other circuit trimmer
controls. Even the slightest adjustment WILL degrade
performance and may cause non-compliance to broadcast
regulations.
Connect Left and Right Audio to the rear panel XLR connectors, and
adjust the source level so that maximum audio peaks register just
below the peak section of the front panel audio level bar graph display.
Use ordinary programme material, rather than test tones. Ensure the
MPX OUT to MPX IN loop-though patch lead (BNC to BNC) is
connected.
Once all settings are correct, power down the unit. Disconnect the test
load and connect to the antenna. Power up the unit and increase the
RF Power (using the rear panel RF ADJ control) to the desired level, not
exceeding 100W.
