Operations Manual

OPERATIONS 4-20
O&M of the MCC-545B PACKET DATA RADIO
12/2000
The 545B interfaces with a number of different GPS or LORAN units and supports various GPS
protocols. You can select the GPS unit and protocol you are using by entering the given
parameter as part of the ASSIGN and POS commands. Refer to Appendix C for specifics on
selecting and using each individual type of GPS unit with the 545B.
MCC is constantly updating its list of GPS units supported by the 545B. Consult the factory for
the latest list of supported devices.
4.6 Master Simulator Mode
When in Master Simulator mode, the 545B can generate repeated Master Station probe signals
and receive "acquired" signals from answering Remotes. After receiving an acquire, the 545B
communicates with the Remote as a Master Station would - the 545B can receive and
acknowledge sensor reports and RF performance stats, send and receive messages, and send
Remote commands and receive the appropriate command responses.
CAUTION
Unless specifically directed, you should only use Master Simulator mode with the special, low-
power 545B configuration. Changes for this low-power configuration include transmitting at 2
watts with the transmit limiter disabled. Consult MCC before operating a full-power 545B in
Master Simulator mode.
Master Simulator Set-up
CAUTION
When using the 545B to generate probe signals, make certain you have a suitable antenna
connected to the 545B's antenna connector and that the RF link to the Remote unit is balanced.
1. The 545B must be set to Master mode in order to generate probe signals. Set 545B's
device type by typing:
DEVICE,MASTER
2. The 545B's bit rate must match that of the Remote unit you want to generate probes for.
The typical MCC Remote unit uses a 4K bit rate. Set transmit/receive bit rate to 4K by
typing:
BRATE,4K
3. The 545B's uses BPSK modulation. You must select this modulation by typing
MODULATION,BPSK