4s Telecom Private Limited

Bengaluru, Karnataka

Year of Establishment: 2001
IndiaMART Member Since: 2005
Products [16]
Phone: +(+91)-(80)-28390195

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Antennas

Yagi Antennas		Yagi antenna consists of an active dipole and several directors mounted on a rugged metallic boom. Yagi antenna is a compact, cost effective Structure suitable for all outdoor applications. Available in 9/12/15dB gain in 900MHz and 1800MHz bands. With VSWR <1.5.
Omni Antennas		Ceiling Antenna and mag mount antenna are available in 2.1dBi and 4dBi gain. These will work in both the bands i.e. 820 to 960 MHz and as well as in 1700 to 2250MHz bands.
Panel Antennas		In door and out door panel antenna are available in 7.5,8.5 and 12dBi gains in 900MHz and 1800MHz bands. Dual band panel antenna are available in 7.5 dB gain.

Carrier Specific Repeaters

Frequency Range		Up link : 890-915/1710-1785/824-849 MHz Down link: 935- 960/1805- 1880/869-894 MHz
Carriers		1-2(according to the user's requirements)
Channel Bandwidth		200kHz for GSM/1.23MHz for CDMA
Gain		100dB
Gain adjustment range		30dB insteps of 2 dB
Auto Gain Control		20 dB minimum
Out put level		Uplink: 1watt down link:5-20watt
VSWR		<1.4
Noise figure		<5
Inter Modulation Products & Spurious Emission		<-36dBm@9kHz-1GHz <-30dBm@1GHz-12.75GHz

Frequency Translating/Shifting Repeater One Master

Frequency Range		Up link : 890-915/1710-1785/824-849 MHz Down link: 935- 960/1805- 1880/869-894 MHz
Carriers		1-2(according to the user's requirements)
Channel Bandwidth		200kHz for GSM/1.23MHz for CDMA
Gain		Master: 40dB/100dB for slave:100dB
Gain adjustment range		30dB insteps of 2 dB
Auto Gain Control		20 dB minimum
Out put level		Master: 2-20watt/ Slave uplink: 2watt down link:5-20watt
VSWR		<1.4
Noise figure		<5

Gsm900/Dcs1800/Cdma Repeaters

Frequency range		Up link : 890-915/1710-1785/824-849 MHz Down link: 935- 960/1805- 880/869-894 MHz
Band width		Any Band width to be specified by the customer with in the above specified ranges
Gain		70 dB for 16dBm: 80 dB for 1 Watt and above
Gain adjustment range		30 dB insteps of 2 dB
Auto Gain Control		20 dB minimum
Out put Level		Down link:16dBm : 30dBm to 40dBm Up link : 16dBm: 30dBm.
Inter modulation products & spurious emission		ETS 300 609 4/GSM 11. 26 At max. output <-36dBm@9kHz- 1GHz: <30dBm@1GHz-12.75GHz.
Noise figure		<5
VSWR		<1.5 : 1.

Multiband Repeaters

Frequency range		Up link : 890-915/1710-1785 MHz Down link: 935- 960/1805- 1880 MHz
Band width/Bands		Any 2 to 4 Sub-Bands either in 900MHz or in 1800MHz or in both combined in one booster. Band width to be specified by the customer with in the above specified ranges
Gain		70 dB for 16dBm: 80 dB for 1 Watt and above
Gain adjustment range		30 dB insteps of 2 dB
Auto Gain Control		20 dB minimum
Out put Level		Down link:16dBm : 30dBm to 40dBm Up link : 16dBm: 30dBm.
Inter modulation products & spurious emission		ETS 300 609 4/GSM 11. 26 At max. output <-36dBm@9kHz- 1GHz: <30dBm@1GHz-12.75GHz.
Noise figure		<5
VSWR		<1.5 : 1.

Power Splitters/Combiners

Operating Frequency	820-960MHz	1700-1900MHz	800-2400MHz
Configuration	2,3 and 4 way	2,3 and 4 way	2,3 and 4 way
Isolation min	20 dB	20 dB
Insertion loss max	0.3 dB*	0.3 dB*	0.3 dB*
VSWR	<1.3:1	<1.3:1	<1.3:1
Impedance	50 Ohms	50 Ohms	50 Ohms
Input Power	1 to 50 watts**	1 to 50 watts**	100 watts
Connectors	N - Female ***	N - Female ***	N - Female ***

Power Splitters/Combiners

Operating Frequency	820-960MHz	1700-1900MHz	800-2400MHz
Configuration	2,3 and 4 way	2,3 and 4 way	2,3 and 4 way
Isolation min	20 dB	20 dB
Insertion loss max	0.3 dB*	0.3 dB*	0.3 dB*
VSWR	<1.3:1	<1.3:1	<1.3:1
Impedance	50 Ohms	50 Ohms	50 Ohms
Input Power	1 to 50 watts**	1 to 50 watts**	100 watts
Connectors	N - Female ***	N - Female ***	N - Female ***

Tapers / Couplers

Operating Frequency		800 – 2400MHz
Coupling		7dB, 10dB, 15dB, 20dB and 30dB.
Coupling Variation		+/- 10%
Insertion loss		<0.2dB
VSWR		<1.4:1
Impedance		50 Ohms
Input power		100 watts
Connector		N- Female

Tapers/Couplers

Operating Frequency		800 – 2400MHz
Coupling		7dB, 10dB, 15dB, 20dB and 30dB.
Coupling Variation		+/- 10%
Insertion loss		<0.2dB
VSWR		<1.4:1
Impedance		50 Ohms
Input power		100 watts
Connector		N- Female

Band Pass Filters

Pass band frequency		902.4-915Mhz
Pass band Insertion Loss		<= 1.5 dB
Isolation at 883Mhz		< -55 dB
Isolation at 889Mhz		<-40 dB
Return loss		Better than 18dB
Input/output Impedance		50 Ohms

C D M A Reject Filters

Pass band frequency		890-915Mhz
Insertion Loss at 890Mhz		<= 2.5 dB
Insertion loss at 890.2Mhz		< -1.8 dB
Insertion loss at 891Mhz		<-1.2 dB
Insertion loss at 892Mhz to 915Mhz		< 1.0dB
Isolation at 888Mhz		> 60 dB
Return loss		Min 18 dB
Input/output Impedance		50 Ohms

Channel Combiners

Frequency Range (MHz)	70-85	140-180	400-520	820-960
Frequency Spacing (MHz)	4	5	15	45
Continuous Power (watts)	50	50	50	50
Insertion Loss Tx–Ant for 2 channels	5.2 dB	5.2 dB	5.2 dB	5.2 dB
Insertion Gain Rx – Ant	12+/-2 dB	12=/-2 dB	12+/-2dB	12=/-2 dB
Isolation from Tx-Tx Minimum	60dB	60dB	60dB	60dB
Rx Isolation at Tx frequency	75 dB	75 dB	75 dB	75 dB
Maximum V S W R	1.3 : 1	1.3 : 1	1.3 : 1	1.3 : 1
Impedance (ohms)	50	50	50	50
Connectors	BNC/N	BNC/N	BNC/N	N/DIN

Duplex Filter

Frequency Range (MHz)	70-85	140-180	400-520	820-960
Frequency Spacing (MHz)	4	5	15	45
Continuous Power (watts)	50	50	50	50
Insertion Loss Tx – Ant	1.2 dB	1.2 dB	1.2 dB	1.2 dB
Insertion Loss Rx – Ant	1.3 dB	1.3 dB	1.3 dB	1.3 dB
Rx Isolation at Tx frequency	75 dB	75 dB	75 dB	75 dB
Maximum V S W R	1.3 : 1	1.3 : 1	1.3 : 1	1.3 : 1
Impedance (ohms)	50	50	50	50
Connectors	BNC/N	BNC/N	BNC/N	N/DIN

Terminations/ Attenuators

– Terminations are available from one watt to 100watts and frequency up to three Giga Hertz with connectors opted by the customer. With better voltage standing wave ratio

• Attenuators are ranging from 3 dB to 50 dB with variation of 10% attenuation and power handling from 1 watt to 50 watts. With better voltage standing wave ratio with connectors opted by the customer.

Tower Mount Amplifier

Frequency Range		Up link : 890-915/1710-1785/824-849 MHz Down link: 935- 960/1805- 1880/869-894 MHz
Down link Insertion loss		<0.8dB
Up link Gain		15 dB
Up link By pass loss		<2.5 dB
Noise figure		<2.5
Feeding Mode		R F Cable
Power supply		12 Volts
V S W R		<1.3 : 1

Tower Mount Block

Frequency Range		Up link : 890-915/1710-1785/824-849 MHz Down link: 935- 960/1805- 1880/869-894 MHz
Down link Gain		12 dB
Down link power output		40 watts
Up link Gain		15 dB
Up link gain adjustment		Insteps of 1 dB
Up link Noise figure		<2.5
VSWR		<1.3
Connectors		Din Female