User Manual

Procedure:
I. Select mid channel. Connect SKU from exciter to VCO, switch DC power on, assert
PTY and measure RF output power on VCO SKT-6. This should be 0dBm to +3dBm.
Measure RF output level on SKU-1. This should be 0dBm to +3dBm (Note that if
SKU-1 is disconnected from the exciter the loop will lose lock). Reconnect SKT and
SKU to exciter.
2. Select lower channel. Assert PTT and check that loop is locked. Adjust trim cap CT1
on VCO for 3VDC (2VDC for N2 band) on SKT- 1. Select upper channel. Check that
the loop is locked and that the voltage on SKT-1 is <18VDC.
3. The following test is not required for the RX VCO. Connect Exciter output to comms
test set. Inject l kHz tone at nominal line input level and check that Exciter RF output
is modulated and that the depth of modulation can be controlled through the
MXTOOLS channel screen.
5.2.5. Micro Controller Module
Comprehensive testing of the Micro Controller can only be carried out at the Factory. The
procedures in sections 5.1.10 to 5.1.13 provide alignment instructions for the workshop
adjustable parameters.