Modern reserve transmitters are solid-state designs and transmit using only A2 modulation. When measuring transmitter center frequency, what precaution must be taken:

Question

Modern reserve transmitters are solid-state designs and transmit using only A2 modulation.  When measuring transmitter center frequency, what precaution must be taken:

Accepted Answer

Modulation must be reduced to zero to eliminate sidebands

Answer

Antenna must be grounded to suppress spurious side-lobes

Answer

Voltage to the PA must be kept at half-value

Answer

Antenna current must be reduced to about 2.5 uA

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