300W DTV TRANSMITTER
MODEL: GME11D32
Specifications：300W UHF DTV Transmitter Professional used for TV transmitter station
Standard: DTMB/DVB-T/DVB-T2
Frequency: UHF 470MHz~700MHz wideband
Outputpower:≥300w
Product introduction：300w digital TV transmitter is mainly consisting of exciter(Modulator), power amplifier (PA) unit, central control unit (CCU), power supply control unit (PSCU), switching mode power supply (SMPS), passive components (divider, combiner, filter, directional coupler, etc.) and cooling system. Its appearance and internal structure are shown on left.
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Overview
GME11D32 300W air cooled UHF DTV transmitter is composed of 1 or 2 exciters, a power amplifier (PA) unit and passive components (divider, combiner, filter, directional coupler, etc.). It’s usually installed in a 1.3 meter high standard 19 inch rack.
PA unit is a 5U chasis, integrated with power amplifier module, central control unit (CCU) and monitoring screen, switching mode power supply (SMPS), air cooling fan and so on, with high integration degrees level.
This transmitter has small volume and compact structure. Multiple transmitters can be installed in single cabinet, convenient installation and operation.
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No. |
Content |
Unit |
Technical Parameter |
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1 |
Frequency Range |
MHz |
UHF470~700MHz |
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2 |
Output Power |
W |
300 |
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3 |
Output Power Stability |
dB |
±0.5 |
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4 |
Output Load Reflection Loss |
dB |
Normal Work≥26dB Allow Work≥20dB |
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5 |
RF Output Impedance |
Ω |
50 |
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6 |
Frequency Accuracy |
MFN |
Hz |
±100 |
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SFN |
Hz |
±1 |
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7 |
Frequency Stability |
Internal 10MHz |
Hz |
≤1×10-7 |
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External 10MHz |
Hz |
≤1×10-10 |
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8 |
SFN Stepped Frequency |
Hz |
≤1 |
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9 |
SFN Delay Adjustment Range |
mS |
0～969.9999 |
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10 |
Shoulder |
+4.2MHz |
dB |
≤-38 |
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-4.2MHz |
dB |
≤-38 |
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11 |
Unevenness within the belt |
Fc±3.591MHz |
dB |
±0.5 |
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12 |
MER |
dB |
≥32 |
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13 |
Adjacent Channel in Band Transmission Power |
dB |
≤-45dB |
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14 |
Adjacent Channel Out of Band Transmission Power |
dB |
≤-60dB |
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15 |
Phrase Noise |
10Hz |
dBc/Hz |
≤-60 |
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100Hz |
≤-75 |
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1KHz |
≤-85 |
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10KHz |
≤-95 |
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100KHz |
≤-110 |
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1MHz |
≤-115 |
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|
16 |
Efficiency |
% |
≥30 |
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Interface
- TS input：ASI，BNC , female, 75Ω.
- 10MHz input: BNC, female, 50Ω, AC coupling, VP-P≥600mV (10MHz reference signal: sinusoid wave, peak-to-peak value range: -5dBm～12dBm).
- 1PPS input：BNC, female, TTL, 50Ω.
- Detection output: SMA, female, 50Ω.
- M&C interface: RJ45 LAN, WiFi, GPRS.
- RF output: DIN 7/16 or 7/8”line feed, 50Ω.
1 | Ambient temperature | Normal operation: 5-45℃ Permitted operation: 0~50℃ |
2 | Relative humidity | Normal operation: ≤90%（20℃） Permitted operation: ≤95%（Non condensation） |
3 | Atmospheric pressure | 86kPa-106kPa |
4 | Power supply | 2-phase, 220V AC, 50Hz |
5 | Dimension | 900mm（D）*600mm（W）*1300mm（H） |
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