VHF UHF Transmitter

Specifications RF Specifications Frequency Band : VHF TV standard: Per Request Color System: PAL, NTSC, SECAM Modulation index : 87. 5% Output power : rated output power Vision output power stability : t 0. 25dB Sound/Vision carrier frequency difference : 6. 5 土 0, 001 MHz Vision / Sound Power...

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Product Details

Specifications

RF Specifications

Frequency Band : VHF

TV standard: Per Request

Color System: PAL, NTSC, SECAM

Modulation index : 87. 5%

Output power : rated output power

Vision output power stability : t 0. 25dB

Sound/Vision carrier frequency difference : 6. 5 土 0, 001 MHz

Vision / Sound Power Ratio : 10 : 1

In-band inter-modulation : -52 dB

Non-required radiation in adjacent channel : -45dB

Non-required radiation out of adjacent channel : -60dB, 1 mw (VHF) or ≤20mw (UHF)

RF Output impedance : 50 Q

Frequency carrier stability (3 months) : ± 200Hz (VHF)/± 400Hz (UHF)


Video Specifications

Video input level:1.0Vp-p

Video input Impedance:75Ω

Video input reflected loss:≥34dB

Amplitude/Frequency response:see table 1

Group delay-frequency response:0-6MHz,±30ns

Differential gain (DG):±5%

Differential phase (DP):±4°

Field time bar tilt K50:≤2%

Line time bar tilt Kb:≤2%

2T Kp:≤2%

2T Pulse Amplitude Kpb:≤2%

Luminance non-linearity distortion:≤5%

C/L gain difference:≤10%

C/L delay difference:±30ns

Signal to random noise ratio S/N (RMS,un-weighted):≥51dB

Signal to periodic noise ratio S/N (RMS,peak-peak):≥51dB

Inner-carrier spurious phase modulation(ICPM):±4%

Blanking level stability:±2.5%


Audio Specifications

Input Level : Od Bm t 6d Bm, 600 Q balanced

Type of emission : FM

Mod. ulati6n capability : > ± 100KHz frequency deviation

Frequency carrier stability (3 months) : ± 200Hz (VHF)/± 400Hz (UHF)

Pre-emphasis : 50 μs

Maximum frequency deviation : ± 50KHz

Harmonic distortion (100% modulation) :≤ 1%( 30Hz-15KHz)

Amplitude-frequency response (50% modulation) :±1dB (30Hz-15KHz, Pre-emph-asis:50 μs)

FM 5/N ratio : ≥60dB (1000Hz, 100% modulation)

AM noise (no modulation) : ≤-50dB

Inner-Carrier noise (100% modulation) : ≤-45dB

Output load reflected loss

Operating : ≥32dB

Setup : ≥20dB

Service conditions

Ambient temperature range : 5-40 ° C

Relative humidity : < 95%, non-condensing

Atmosphere pressure : 86-106Kpa

AC Mains Supply:380V (+15% /-20%), 50Hz t 1Hz or per request

Cooling mode:air cooling


Table 1

f

(MHz)

-4.43

-1.25

-0.75

-0.5

0

+1.5

+3

+4.5

+6

+6.5

>6.5

Up

(dB)

-30

+0.5

+0.5

+0.5

+0.5

0

+0.5

+0.5

+0.5

-20

-20

Down

(dB)

-

-

-4

-1.5

-0.5

0

-1

-1

-4

-

-


About us

We specialized in production and sales of FM / TV Transmitter , FM / TV antenna , the FM / TV transmitter accessories. We have been exporting FM /TV transmitter for 20 years. We have clients all over the world, not only the resellers but also the consumers. With 20 dicateddin supplying the best quality products with competive prices and excellent customer sevice! If you have any question about it , No matter you buy or not, please feel free to tell us your questions,we are very willing to help you and solve your problems.

We have modernization of the factory . You are welcome to visit our factory when you come to China.

At present , there are already agbe customers around the world visited our office . If you come to China , you are welcome to visit us .


FAQ

1. Coverage of FM transmitter and TV transmitter.

The main parameter which decides the coverage is height of tower, so people install the antenna on very tall tower or build the tower on top of mountain. The signal has attenuation in air transmission, so people use large power of transmitter to supply the power loss. In a word, the main reason of coverage is relative height of tower to ground, secondly is power of transmitter, thirdly is antenna gain.

2. How can I know my coverage.

You can tell us the power of transmitter you have and height of tower plus coordinates if possible, then we can calculate the coverage for you.

3. Can I change the frequency.

For FM transmitter, the frequency is agile, you can select any frequency within 88~108Mhz. For TV transmitter, the bandwidth is narrow, you can just select adjacent 2 or 3 channels.

4. Can we get a lower price? Any Discount?

Yes,price is not a problem,everything could be negotiated based on the quantity.

5. We are new in this PON fields,can you help me and recommend me some items?

Yes,of course.it is our pleasure to help you with it.

You only need to offer us more details about your application.

6. What is your MOQ?

No MOQ for any sample test,at least 100pcs/models after sample order.


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