User Manual

COMMUNICATION CERTIFICATION LABORATORY TEST REPORT: 73-6560
FCC ID: NQE1005
Example System Operation
Let us assume a system with 16 TIM Transmitters and one WinGate 2000 TIM Receiver.
Each TIM Transmitter is attached to meters with event counts set to allow transmitters to
transmit depending on meter demand from a few minutes to several hours. As each TIM reaches
the condition were the event count equals the preset count the contents of the accumulator will be
sent to the receiver. Let us say the accumulator was at 1010 and the event count was set to 20 the
value received would be 1030. Let us assume that either some other Transmitter or another TIM
transmitted at the same time on the same frequency one packet might be lost but on the next
transmit a count of 1050 would be received only the intermediate count of 1030 would be lost.
Because of the random nature of count generation the over all system error rate is very
acceptable.
Frequency Table Description
The frequency assignments were made on the basis of dividing the available channel allocation
into 400 KHz channels. Then dropping the end channels for guard bands and the center channels
next to 916 MHz for improved performance. The channels were assigned the numbers 1 – 25
then randomized as shown in figure 1.
Assigned Tx Freq Random Table
1 905.8MHz 8 910 MHz
2 906.4 MHz 18 920 MHz
3 907 MHz 19 920.6 MHz
4 907.6 MHz 4 919.4 MHz
5 908.2 MHz 20 921.2 MHz
6 908.8 MHz 25 924.2 MHz
7 909.4 MHz 4 907.6 MHz
8 910 MHz 2 906.4 MHz
9 910.6 MHz 13 917 MHz
10 911.2 MHz 24 923.6 MHz
11 911.8 MHz 7 909.4 MHz
12 912.4 MHz 22 922.4 MHz
13 917 MHz 6 908.8 MHz
14 917.6 MHz 23 923 MHz
15 918.2 MHz 1 905.8 MHz
16 918.8 MHz 16 918.8 MHz
17 919.4 MHz 14 917.6 MHz
18 920 MHz 15 918.2 MHz
19 920.6 MHz 9 910.6 MHz
20 921.2 MHz 10 911.2 MHz
21 921.8 MHz 11 911.8 MHz
22 922.4 MHz 12 912.4 MHz
23 923 MHz 21 921.8 MHz
24 923.6 MHz 3 907 MHz
25 924.2 MHz 5 908.2 MHz
Figure 1