Note
QST, Oct 1977, p. 103.
The remote VFO for 540/544 transceivers had six modes: TRANSCEIVER transmit and receive, REMOTE transmit and receive, TRANSCEIVER transmit-remote receive, REMOTE transmit-transceiver receive, TRANSCEIVER transmit-BOTH receive, and REMOTE transmit-BOTH receive. The 242 also had two crystal positions for fixed frequency operation;