Futaba 9CPS User Manual
Page 17
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