Cobra Electronics PR3000DX - Manual (Page 10)

Customer Assistance Warranty Introduction
17 Nothing comes close to a Cobra ™
Operation
General Specifications
•
Nominal Unit
Nominal Unit
C. Transmitter
1. Power
GMRS . . . . . . . . . . . . . . . . . . . .W 2
FRS Only . . . . . . . . . . . . . . . . .mW 500
2. Carrier Frequency Stability . . . ±Hz 500
3. Modulation Limiting . . . . . . . . KHz 2.5
4. Carrier Attack Time . . . . . . . . . mS 80
5. Audio Frequency Response
@ 300 HZ . . . . . . . . . . . . . . . . . dB -12
@ 2500 HZ . . . . . . . . . . . . . . . . dB +6
6. Audio Distortion . . . . . . . . . . . . % 3
7. Hum Noise . . . . . . . . . . . . . . . . dB 30
8. Transient Frequency Behavior
a) TX On . . . . . . . . . . . . . . . . . mS 30
b) TX Off . . . . . . . . . . . . . . . . . mS 5
A. FRS/GMRS
Frequency
Allocation and
Compatibility
Important: Please note that Cobra ® GMRS
models with 15 channels may designate
different channel numbers for the same
frequency. For example, a Cobra
® 15 channel
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 = Channel No. For
22 Channel GMRS Models
B = Channel No. For 15
Channel GMRS Models
C = Type of Radio Service
D = Frequency in MHz
E = Power in Watts
a = 2.0/0.5 (selectable)
b = 0.5
A B C D E
1 1 FRS/GMRS 462.5625 a
2 2
FRS/GMRS 462.5875 a
3 3 FRS/GMRS 462.6125 a
4 4 FRS/GMRS 462.6375 a
5 5 FRS/GMRS 462.6625 a
6 6 FRS/GMRS 462.6875 a
7 7 FRS/GMRS 462.7125 a
8 FRS
467.5625 b
9 FRS 467.5875 b
10 FRS 467.6125 b
11 FRS 467.6375 b
12 FRS 467.6625 b
13 FRS 467.6875 b
14 FRS 467.7125 b
15 11 GMRS 462.5500 a
16 8 GMRS 462.5750 a
17 12 GMRS 462.6000 a
18 9 GMRS 462.6250 a
19 13 GMRS 462.6500 a
20 10 GMRS 462.6750 a
21 14 GMRS 462.7000 a
22 15 GMRS 462.7250 a
B. Receiver
1. Sensitivity
For 12 DB SINAD . . . . . . . . . . dBm -121
For Call Signal Detection . . . . dBm -121
2. Max. Audio Output
@10% THD . . . . . . . . . . . . . . . mW 200
3. Max. S/N Ratio
@ 1mV RF Input . . . . . . . . . . . dB 50
4. Squelch
a) Sensitivity . . . . . . . . . . . . . . dBm -121
b) Attack Time . . . . . . . . . . . . . mS 150
c) Closing Time . . . . . . . . . . . . mS 200
5. Audio Frequency Response
@ 300 HZ . . . . . . . . . . . . . . . . . dB -3
@ 2500 HZ . . . . . . . . . . . . . . . . dB -10
6. Signal Displacement BW . . . +/-KHz 5
7. Adjacent Channel Rejection . . . dB 60
8. Intermodulation Rejection . . . . dB 65
9. Spurious Response Rejection . dB 55
D. Power Supply
1. Battery Life (5:5:90 RATIO)
With Alkaline Batteries . . . . . . . HR 24
2. Battery Operating Range . . . . . . V 4.2 - 6.0
Nominal Unit
16 English
Using Your Radio
Speaker/Microphone Jack
•
Your microTALK ® radio can be fitted with an
external Speaker/Microphone, freeing your
hands for other tasks. See page 20 for optional
accessories ordering information. Only Cobra
®
authorized accessories are recommended.
To attach your Speaker/Microphone:
1. Open the Speaker/Microphone tab on
top of your microTALK ® radio.
2. Insert the plug into the Speaker/
Microphone jack.
Signal Strength Meter
•
Your microTALK ® radio has a signal strength
meter that shows the strength of your incoming
and outgoing transmissions. The ascending bars
next to the signal strength indicate the strength
of the signal. The greater the number of bars
visible, the stronger the signal. The fewer
number of bars visible, the weaker the signal.
microTALK ® Range
•
Your microTALK ® radio has a range of
up to six (6) miles (10 km). Your range will
vary depending on terrain and conditions.
In flat, open country your radio will
operate at maximum range.
Buildings and foliage in the path of the
signal can reduce the range of the radio.
Dense foliage and hilly terrain will
further reduce the range of the radio.
On FRS channels 8 through 14, your radio
automatically switches to low power, which
will limit the range the radio can communicate.
Remember, you can achieve maximum
range by using Maximum Range
Extender. See page 15 for details.
Speaker/Microphone
Signal Strength
Operation
Maximum Range
Reduced Range
Reduced Range