Futaba 9CPS User Manual

Page 17

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17

Range Testing Your R/C System
Please note that different systems demonstrate different range checks and the same system will range check differently in
different conditions. Also, the receiver antenna's installation affects the range test -- exiting the top of the model is ideal.
This is a brief explanation of range test. For more in-depth specifics on receiver antenna mounting, additional checks if
unsatisfactory rage is demonstrated, range checking with gasoline powered engines, etc, please see our F.A.Q. page at
www.futaba-rc.com.

• Leave the transmitter's antenna retracted and be sure both batteries are fully charged.
• Position the aircraft away from wires, other transmitters, etc.

Test one - engine/motor off, minimum of 100 ft. range

• Have a friend view the model but not hold it, engine off. (People conduct signals, too!)
• Walk away from the model, working all controls constantly. Stop when the servos jitter significantly (a jitter here

and there is normal), control movement stops (PCM), or you lose control altogether.

• Measure the distance. If greater than 100 feet, great! Proceed to Test 2. Less than 100 feet of range check means you

need more information to determine if your system is safe to fly. Please see our web site or call support for addi-
tional tests to perform before flying your system.

• Repeat with friend holding the model. Note any differences.

Test two - engine/motor on

• Repeat the test with the model's engine running and with someone holding the model. If a decrease of more than

10% is noted, research and resolve the cause of interference prior to flying your model.

What your fully operational system demonstrates is the normal range for your system in those conditions. Before every
flying session, it is critical that you perform a range check. It is also required by the AMA Safety Code. If you notice a
significant decrease in range with fully charged batteries, do not attempt to fly.

Aircraft (fixed wing and helicopter) Frequencies
The following frequencies and channel numbers may be used for flying aircraft in the United States:

Installing your frequency number flag:

It is very important that you display your transmitting chan-
nel number at all times.
To install your flag, peel off the chan-
nel number’s backing sheet, and carefully stick the numbers to
both sides of the number holder. Now you can snap the number
holder onto the lower portion of the antenna as shown in the
figure — use the clip that fits more snugly on your antenna.
You may wish to cut off the other, unused clip on the other side
of the flag.

72 MHz band
Ch.

MHz

Ch.

MHz

11

72.010

36

72.510

12

72.030

37

72.530

13

72.050

38

72.550

14

72.070

39

72.570

15

72.090

40

72.590

16

72.110

41

72.610

17

72.130

42

72.630

18

72.150

43

72.650

19

72.170

44

72.670

20

72.190

45

72.690

21

72.210

46

72.710

22

72.230

47

72.730

23

72.250

48

72.750

24

72.270

49

72.770

25

72.290

50

72.790

26

72.310

51

72.810

27

72.330

52

72.830

28

72.350

53

72.850

29

72.370

54

72.870

30

72.390

55

72.890

31

72.410

56

72.910

32

72.430

57

72.930

33

72.450

58

72.950

34

72.470

59

72.970

35

72.490

60

72.990

50 MHz Band

(Amateur Radio Operator “HAM” license required)

Ch. MHz Ch. MHz
00

50.800

01

50.820

02

50.840

03

50.860

04

50.880

05

50.900

06

50.920

07

50.940

08

50.960

09

50.980

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