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Simply because of the band-width required to transmit and receive calls. If the channel spacing was narrower - they'd need to reduce the band-width - which would reduce the amount of data they could transmit.
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How do you convert cellphone gsm frequency to another gsm frequency?
How do you convert cellphone gsm frequency to another gsm frequency?"
What is the radio frequency range of inmarsat satellite?
System Specifications: 1. Tx Frequency; 1626.5-1646.5MHz 2. EIRPG33/25dBW 3. Rx Frequency; 1525.0-1545.0MHz 4. Channel Spacing; 20kHz
What is the minimum and maximum spacing for placing reinforcement bar?
maximum spacing assording to IS 456 = 300mm
What is the spacing of steel bar in floor slab type of example?
Allowable clearing spacing of bars = 3d where d is depth suppose d is 180 mm than clearing spacing is 3(180) =540mm note that clearing spacing of slab donot exceed upto 750mm
What is Standard spacing for floor joist determined by?
Spacing for floor joists is usually determined by building codes for the location
How do you find 125 channel in gsm?
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How many channels are present in GSM 900?
174 no ........ the uplink is 890-915 & down link is 935-960.....MHz each channel having band width of 200KHz & using by 8 subsciber.... so 25MHz/200Khz ......=125...so there are 125 channels present in GSM900 but one channel is use as a guard so only 124 channel present in GSM900
Why in gsm we are taking 200kHz as bandwidth why we cant take 100kHz or some thing less than 200kHz so that we can increase the ARFCNs.?
because we can use 99% of 270.5 kbps which is normally used for air interface in gsm, to get a minimum bit error rate of 1% and 8/1 db sn ratio.
What is the difference between WDM and DWDM?
WDM classification is based on channel spacing between two wavelengths * channel spacing greater than 200GHZ is called as CWDM * channel spacing greater than 100GHZ is called as WDM * channel spacing lesser than 100GHZ is called as DWDM * channel spacing lesser than 25GHZ is called as UDWDM 100GHZ = 0.8nm WDM classification is based on channel spacing between two wavelengths * channel spacing greater than 200GHZ is called as CWDM * channel spacing greater than 100GHZ is called as WDM * channel spacing lesser than 100GHZ is called as DWDM * channel spacing lesser than 25GHZ is called as UDWDM 100GHZ = 0.8nm
What is a channel spacing?
Channel spacing is the difference in the frequency allocation of the allocated frequency plan to avoid overlap between the channels or frequencies.
What is 200kHz in the electromagnetic spectrum used for?
-- aeronautical mobile -- aeronautical radionavigation
What is the full bit rate per voice channel in GSM?
270.83 kbps
What is Packet Data Channel?
Any time-slot on any GSM radio channel assigned to GPRS usage is defined as a Packet. Data CHannel(PDCH).
Gsm 900 vs gsm 1800?
GSM 900 operates at a frequency of 900 MHz, providing better coverage in rural areas due to its longer wavelength. GSM 1800 operates at a frequency of 1800 MHz, offering higher capacity and faster data speeds in urban areas. The choice between GSM 900 and GSM 1800 depends on the population density and geographic area where the service will be provided.
Is it possible to make an Electronic Pest Repellent using Arduino and make ultrasound from 30khz to 200khz frequency?
Yes it is possible to make an Electronic Pest Repellent using Arduino and possible to make ultrasound for 30khz to 200khz frequency; you must make a rectangle signal with a frequency and amplify it with transistors.
What are lapd and lapdm gsm?
link acess protocol for the D channel is used in the radio link between bts and ms
What is 200KQ7W emission?
200KQ7W is the emission bandwidth of GSM 900/1800 network. 200K - 200KHz bandwidth Q - The carrier is angle-modulated during the period of the pulse 7 - Two or more channels containing quantized or digital information. W - Information to be transmitted- telegraphy, facsimile,telemetry, data transmission, telephony and television(video)
