General Specifications; Power Supply - Cobra Microtalk PR135 Owner's Manual

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General Specifications

Operation
A. FRS/GMRS
Frequency
Allocation and
Compatibility
Important: Please note that Cobra
models with 15 channels may designate
different channel numbers for the same
frequency. For example, a Cobra
GMRS model would need to be tuned to
channel 11 in order to communicate with
a 22 channel GMRS tuned to channel 15.
Please refer to the chart below for channel/
frequency number compatibility.
A = 22 Channel GMRS
Channel No. Displayed
B = Channel No. For 15
Channel GMRS Models
C = Type of Radio Service
D = Frequency in MHz
E = Power in Watts
A B C
1 1 FRS/GMRS 462.5625
2 2 FRS/GMRS 462.5875
3 3 FRS/GMRS 462.6125
4 4 FRS/GMRS 462.6375
5 5 FRS/GMRS 462.6625
6 6 FRS/GMRS 462.6875
7 7 FRS/GMRS 462.7125
8 FRS 467.5625
9 FRS 467.5875
10 FRS 467.6125
11 FRS 467.6375
12 FRS 467.6625
13 FRS 467.6875
14 FRS 467.7125
15 11 GMRS 462.5500
16 8 GMRS 462.5750
17 12 GMRS 462.6000
18 9 GMRS 462.6250
19 13 GMRS 462.6500
20 10 GMRS 462.6750
21 14 GMRS 462.7000
22 15 GMRS 462.7250
English
10
B. Receiver
1. Sensitivity
For 12 DB SINAD . . . . . . . . . . . dBm
For Call Signal Detection . . . . . dBm
® GMRS 2. Max. Audio Output
@ 10% THD . . . . . . . . . . . . . . . . mW
3. Max. S/N Ratio
® 15 channel
@ 1mV RF Input . . . . . . . . . . . . dB
4. Squelch
a) Sensitivity . . . . . . . . . . . . . dB sinad
b) Attack Time . . . . . . . . . . . . . . mS
c) Closing Time . . . . . . . . . . . . . mS
5. Audio Frequency Response
@ 300 HZ . . . . . . . . . . . . . . . . . dB
@ 2500 HZ . . . . . . . . . . . . . . . . dB
6. Signal Displacement BW . . . . +/-KHz
7. Adjacent Channel Rejection . . . . dB
8. Intermodulation Rejection . . . . . dB
9. Spurious Response Rejection . . . . dB
D E
C. Transmitter
0.5
0.5
1. Power . . . . . . . . . . . . . . . . . . . . mW
0.5
2. Carrier Frequency Stability . . . . . ±Hz
0.5
3. Modulation Limiting . . . . . . . . . KHz
0.5
4. Carrier Attack Time . . . . . . . . . . mS
0.5
5. Audio Frequency Response
0.5
@ 300 HZ . . . . . . . . . . . . . . . . . dB
0.5
@ 2500 HZ . . . . . . . . . . . . . . . . dB
0.5
6. Audio Distortion . . . . . . . . . . . . %
0.5
7. Hum Noise . . . . . . . . . . . . . . . . dB
0.5
8. Transient Frequency Behavior
0.5
a) TX On . . . . . . . . . . . . . . . . . mS
0.5
b) TX Off . . . . . . . . . . . . . . . . . mS
0.5
0.5
0.5
D. Power Supply
0.5
0.5
1. Battery Life (5:5:90 RATIO)
0.5
With Alkaline Batteries . . . . . . . HR
0.5
2. Battery Operating Range . . . . . . V
0.5
0.5
-122
-122
350
40
10
120
200
-3
-10
6
50
65
55
500
500
2.5
80
-12
3
3
30
30
5
24
4.2 – 6.0