600W FM radio transmitter used in broadcasting, television, radio communication

Introduction:

This transmitter adopts the concept of simple design and integrates the ex citer and power amplifier, output filter, switching power supply, etc into a 2 U high 19-inch standard case. This advanced design reduces the number of connection cables and improves the overall efficiency of the transmitter, ma king it more reliable and easier to operate.

Features

l Humanized digital LCD touch panel, simple operation interface with direct touch control.

l The integrated LCD displays all system parameters: transmitter frequency, stereo and mono, volume, amplifier tube temperature, audio signal UV meter, forward power, reflected power, modulation mode, and pre- emphasis etc.

l 2U 19-inch thick aluminum alloy case, which is not only sturdy but also has good heat dissipation.

l Precise PLL frequency generation system to ensure the frequency does not drift within at least 10 years.

l Built-in high-quality professional stereo encoder.

• Excellent power AGC balance control system, the power output can be adjusted from 0 to full power, and has automatic gain power control to maintain the output power within a set range without drifting.

l Support external input modulation RDS or SCA signal.

l Supports AES-EBU digital signal input, 24Bit 192KHz sampling rate input range, true lossless audio.

l Equipped with RS232 communication interface, users can control all operations through the transmitter communication protocol.

l RF amplifier uses LDMOS transistor BLF188XR, making it able to withstand severe load mismatch of more than 65: 1 VSWR at 5dB compression point.

l Automatically record 9 latest device alarms for later troubleshooting.

Parameters

Frequency: 87.5-108MHz, Frequency step value: 10KHz

Modulation mode: FM, peak deviation ± 75KHz Frequency stability: <± 100Hz

Frequency stabilization method: PLL phase-locked loop frequency synthesis RF output power: 0 ～ full power ± 0.5dB

In-band residual wave: <-70dB Higher harmonics: <-65dB Parasitic AM: <-79dB

RF output impedance: 50Ω

RF output connector:(350W&600W) L16 female (1000W&1500W) L29 female RF efficiency:> 78%

Analog audio input: -12dBm ~ + 8dBm Audio level gain: -15dB ~ 15dB step 0.5dB

Analog audio input impedance: 600Ω balanced XLR AES / EBU input impedance: 110Ω balanced XLR AES / EBU input level: 0.2 ~ 10Vpp

AES / EBU sampling rate: 30KHz ~ 192KHz 24BIT RDS / SCA input: unbalanced BNC

RDS / SCA input level gain: -15dB ~ 15dB step 0.5dB Pre-emphasis: 0μs, 50μs, 75μs (users can set) Frequency response: ± 0.1dB 30 ～ 15000Hz

Stereo resolution:> 60dB

S / N ratio stereo:> 70dB 30 ～ 15000Hz S / N ratio mono:> 75dB 30 ～ 15000Hz Audio distortion: <0.05%