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| Maximum AV 1023 M PAL B/G NICAM stereo modulator |
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| Product id: 7681 |
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| PRODUCT DESCRIPTION |
| Maximum AV 1023M is an agile adjacent modulator module with NICAM modulated audio added to the RF TV channel (48 - 860 MHz). This module is designed for the Maximum SMATV headend system. The spurious harmonics is less than 60 dB. Both video and audio carries are PLL controlled to ensure accuracy and stability. RF amplification circuit realizes low non-linear disortion and high output level. With built-in MCU controlling, full band can be programmed. The feature of last channel memory is supported and RF output level is above 100 dBµV. |
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| FEATURES |
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48 - 860 MHz agile adjacent modulation output |
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NICAM modulated audio output |
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PAL B/G (NTSC, SECAM TV system factory optional) |
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Mono, stereo, dual audio mode selectable |
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High 100 dBµV RF output level |
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Two PLL synthesized channel control |
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Programmed full band by MCU |
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Low spurious harmonic less than -60 dB |
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Built-in high-grade SAW VSB filter assure ultimate performance |
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Video pre-correction circuit for low DP, DG and C/L delay |
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| TECHNICAL SPECIFICATIONS |
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| RF |
Output frequency: 48,25 ~ 860,25 MHz adjustable |
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Frequency adjust step: 1 MHz |
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Output level: Max. 100 dBµV |
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Output level attenuation: 0 - 18 dB (adjustable, steps by 1 dB) |
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TV system: PAL B/G (NTSC, SECAM optional) |
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Output impedance: 75 Ω |
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Output return loss ≥ 12 dB (VHF); ≥ 10 dB (UHF) |
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Picture carrier accuracy: ≤ ± 5 dB (VHF); ≤ 10 dB (UHF) |
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Spurious/harmonic rejection: ≥ 60 dBc |
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V/A carrier ratio: 5,5 MHz: 12 dB / 5,742 MHz: 16 dB |
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| Video |
Input level: 1,0 Vp-p @ 87,5 % modulation |
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C/L delay: ≤ 45 ns |
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V/A carrier power ratio: 5,5 MHz: 13 dB / 5,85 MHz: 20 dB |
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S/N ratio: ≥ 54 dB |
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Difference gain: < 3° |
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Difference phase: < 3° |
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K2T: ≤ 4 % |
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Frequency response: ≤ 2 dB |
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| Audio (FM) |
The audio carrie frequency: 5,5 MHz ± 5 KHz |
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FM frequency deviation: ± 50 KHz @ 0 dBu |
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Frequency response: ± 1,5 dB |
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Harmonic disortion: ≤ 1 % |
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S/N ratio: ≥ 60 dB |
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Pre-emphasis: 50 µs (PAL B/G) |
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| Audio (NICAM) |
Frequency: 5,85 MHz (system B/G) |
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Sub-carrier accuracy: ± 2 ppm when locked to internal reference |
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Spectrum shape: 40 % roll-off |
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Harmonics and spurious: < -55 dB relative to NICAM carrier level |
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| A/D conversion for NICAM |
Pre-emphasis: According to ITU-T J.17 |
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A/D conversion principle: Delta-sigma, 64 x oversampling, digital antialiasing filter |
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Sample rate: 2048 KHz |
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Resolution: 16 bit |
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Ripple: ± 0,2 dB, 20 Hz - 14,5 KHz |
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Stop band attenuation: > 65 dB above 18,5 KHz |
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1 KHz: < -90 dB |
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14 KHz: < -80 dB |
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Noise: Typ. -70 dB, rel. 0 dBu |
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| Atmospheric pressure |
86 ~ 106 Kpa |
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| Operating temperature |
-10 ~ 40° C ± 3° C (4 h) |
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| Storage temperature |
-40 ~ 60° C ± 3° C (8 h) |
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| Dimensions (W x H x D) |
295,7 x 30 x 100 |
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