Operations Manual

INSTALLATION 3-11
O&M of the MCC-545B PACKET DATA RADIO
12/2000
3.3.3 Set Unit ID
It is very important that the unit ID be set correctly before operation on an antenna. If the unit
transmits with the wrong ID, it may conflict with another unit in the system and result in data or
messages being misrouted or lost and network topography and statistics being confused. Use the
ID Command to set the unit ID:
ID,nnnn,mmm{,aaaa},INIT
where nnn is the unit ID, mmm is the Master Station assignment and aaaa is the Master
connectivity initial setting for Remote operation. Obtain these numbers from your network
manager. The 545B will save the ID (and total configuration) and reboot.
3.3.4 Set and Verify Tx/Rx Frequencies
The MCC 545B contains an internal frequency synthesizer that is used to set the Tx frequency
and two receiver local oscillator frequencies. The first local oscillator frequency is set to 10.7
MHz above the desired receive frequency. The second local oscillator frequency is set at 10.6
MHz and can not be changed. The unit is programmed by a factory-trained technician to operate
on a number of authorized frequency channels. Once programmed , these frequencies can be
selected by the operator.
You can set or display the TX and RX frequencies using the following command:
FREQUENCIES, XXXX,YYYY
Where XXXX is the desired transmit frequency and YYYY is the desired receive frequency
Example: FREQUENCIES,4550,4550 for Tx and Rx on 45.50 MHz
You can only select those frequencies programmed into the unit at the factory.
Once the frequencies are selected, you must make sure that the synthesizer is “ON” and locked,
by entering the following command:
SYNTHESIZER, ON
The unit will respond with
SYNTHESIZER, ON Locked or Unlocked
If the synthesizer returns an unlocked response, check the frequency command to insure that you
have entered the proper frequencies. Note that the unit will not transmit if the synthesizer is not
locked.