Technical Manual

Preliminary Release

8. Set the desired transmitter frequency. For example, tf=757.0950.0<CR>.

9. Set the desired receiver frequency. For example, rf=787.0940.0<CR>.

10. Set the desired transmit power. For example, tp=1<CR>.

11. Use the dt=1<CR> command to activate the transmitter carrier in CW mode to

confirm frequency and RF level on a spectrum analyzer. You will have 120 seconds

before the anti-streaming timer expires and deactivates the CW carrier. Typing

<ESCAPE> or <ENTER> will deactivate the CW carrier.

12. You may run other optional tests to verify radio functionality:

a. Connect two 2788 radios together using suitable attenuators and coaxial cable.

Configure one radio to transmit CW (dt=1<CR>) and the other to receive CW

(dt=2<CR>). The receiver displays the received signal strength in dBm.

b. Connect two 2788 radios together using suitable attenuators and coaxial cable.

Configure one radio to be a master (om=1<CR>) to send test packets (dt=3) and the

other to be a remote (om=0) to receive test packets (dt=4<CR>. The receiver will

monitor the number of good and bad test packets received in this one-way test.

c. Connect two 2788 radios together using suitable attenuators and coaxial cable.

Configure one radio to be a master (om=1<CR>) to send a round-trip test packet

(dt=5) to the remote radio. The master 2788 radio must also be given the 2788 MAC

address of the remote radio. To enter the remote loop-back MAC address, enter:

lb=##-##-##-##-##-##

The remote radio (om=0<CR> will automatically echo back packets when in the

dt=0<CR> configuration.

13. Alligator provides software testing tools to do end-to-end testing such as the

Alligator Packet Error Rate Tester. For example, Alligator provides software tools for

simulating a host sending random data messages to keep track of errors that are not

echoed back properly by an RTU simulator tool.