Cobra Electronics PR4000WX owner manual MicroTALK Range, General Specifications

Operation

Maximum Range

Using Your Radio

microTALK® Range

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Introduction Operation Customer Assistance Warranty

General Specifications

•

Reduced Range

Reduced Range

Your microTALK® radio has a range of up to seven (7) miles (11 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 22 for details.

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 = 3.0/2.0/0.5 (selectable) b = 0.5

A B CD E

B. Receiver Unit

1. Sensitivity

For 12 DB SINAD . . . . . . . . . . dBm

For Call Signal Detection . . . . dBm

2. Max. Audio Output

@10% THD . . . . . . . . . . . . . . . mW

3. Max. S/N Ratio

@ 1mV RF Input . . . . . . . . . . . dB

4. Squelch

a) Sensitivity . . . . . . . . . . . . . . dBm 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

C. Transmitter Unit

Nominal

-121 -121

200

50

-121

150

200

-3

-10 5 60 65 55

Nominal

1	1	FRS/GMRS	462.5625	a	1.	Power
2	2	FRS/GMRS	462.5875	a		GMRS	.W	3
3	3	FRS/GMRS	462.6125	a		. . . . . . . . . . . . . . . .FRS Only	.mW	500
4	4	FRS/GMRS	462.6375	a	2.	Carrier Frequency Stability . . .	±Hz	500
5	5	FRS/GMRS	462.6625	a	3.	Modulation Limiting	KHz	2.5
6	6	FRS/GMRS	462.6875	a
					4.	Carrier Attack Time	. mS	80
7	7	FRS/GMRS	462.7125	a
					5.	Audio Frequency Response
8		FRS	467.5625	b
						@ 300 HZ	. dB	-12
9		FRS	467.5875	b
						@ 2500 HZ	. dB	+6
10		FRS	467.6125	b	6.	Audio Distortion	. %	3
11		FRS	467.6375	b
					7.	Hum Noise	dB	30
12		FRS	467.6625	b
					8.	Transient Frequency Behavior
13		FRS	467.6875	b
						a) TX On	mS	30
14		FRS	467.7125	b
15	11	GMRS	462.5500	a		. . . . . . . . . . . . . . . .b) TX Off	. mS	5
16	8	GMRS	462.5750	a
19	13	GMRS	462.6500	a			Unit	Nominal
17	12	GMRS	462.6000	a	D. Power Supply
18	9	GMRS	462.6250	a
20	10	GMRS	462.6750	a	1.	Battery Life (5:5:90 RATIO)
21	14	GMRS	462.7000	a
						With Alkaline Batteries	HR	24
22	15	GMRS	462.7250	a
					2.	Battery Operating Range	V	4.2 - 6.0

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