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Maxiva™ VAX Compact Class
The Maxiva™ VAX Compact Class family of VHF Band III solid-state transmitters, transposers/translators and gap fillers (formerly Platinum™ VAX Compact Class) builds on the proven foundation of GatesAir low-power systems and PowerSmart® technology. It provides today’s digital broadcaster with a suite of compatible products to accommodate any coverage application, along with unmatched performance, reliability and quality.
Designed for digital broadcasting, the Maxiva VAX Compact Class is a platform available as a transmitter for DAB, DAB+ and DMB radio, or as transmitter, transposer or SFN gap filler configurations for DVB-T/H, DVB-T2, ATSC, ATSC-MDTV, ISDB-Tb and analog television networks. The Compact Class is ideal for extending market coverage and filling in coverage gaps in challenging situations, including busy urban areas that require greater building penetration.
Maxiva VAX Compact Class covers low-power VHF transmissions in a 2RU chassis design, with rack savings of up to 50 percent compared to previous-generation transmitters of equivalent power levels. This product integrates Maxiva M2X™ exciter technology to enable simple modulation changes and analog-to-digital upgrades, providing broadcasters the highest level of performance and allowing fast setup time with Real Time Adaptive Correction (RTAC™). The shared modulation approach provides a common interface for Platinum users, reducing training requirements.
The Maxiva VAX Compact Class provides pre-filter power levels up to 150 W (DAB/DAB+/DMB), 180W (ATSC), 100W (COFDM) or 250W (Analog).VAX Compact Class transposers/translators provide efficient and reliable re-broadcast of the received signal in a small and robust package. The gap filler configuration adds a powerful echo cancellation algorithm to deliver on-channel broadcast. This combination of products enables broadcasters to address any network coverage need.
Maxiva VAX Compact Class Platform:
- Power levels from up to 150W DAB/DAB+/DMB, 100 W TV-COFDM, 180 W ATSC,
- Broadband, frequency agile design – VHF 168 to 242 MHz
- Built-in GPS option for Single Frequency Network (SFN) support
- Compact, space-saving, 2RU design
- Full remote control capability including:
Web-based HTML GUI interface
SNMP
Parallel control/monitoring
Transmitter:
- Dual transport stream inputs with manual/auto switching
- Real-Time Adaptive Correction (RTAC)
- DAB, DAB+, DMB, DVB-T/H, DVB-T2, ATSC, ATSC-MDTV, ISDB-Tb modulations available
Transposer/Translator:
- For all TV-COFDM and ATSC standards
- Digital, tunable RF input filter
SFN Gap Filler:
- Powerful adaptive echo cancellation with up to 15 dB gain margin for exposed stations and difficult situations
- Very low processing delay, ideal for short guard intervals in COFDM
- Digital IF filter for maximum adjacent channel suppression
- Digital, tunable RF input filter
| General | |
|---|---|
| RF Output Frequency Range | VHF Band III, 168 to 242 MHz, in 1 Hz steps |
| Transmission Standards | DAB, DAB+, DMB, ATSC, DVB-T, DVB-T2, ISDB-Tb, Analog |
| RF Channel Bandwidth | (System dependant) 1.5, 6,7, or 8 MHz |
| Rated Output Power (before mask filter) |
DAB/DAB+/DMB: Up to 150 Watts ATSC: Up to 180 Watts DVB-T/T2, ISDB-Tb: Up to 100 Watts Analog: Up to 250 Watts pk sync |
| RF Power Stability | ±0.5dB |
| Output Power Reduction Range | 0 to -10 dB |
| RF Load Impedance | 50 Ohms |
| Operating Load VSWR | Up to 1.4:1 |
| Maximum VSWR | Protected against open or short circuit, all phase angles. Automatic VSWR foldback with user adjustable threshold. Factory pre-set to 1.4:1. |
| Inputs/Outputs | |
|---|---|
| RF Output Connector | 1 x Type N Female, 50 ohms, rear access |
| RF Input Samples for Adaptive | 1 x SMA, 50 ohms; dynamic range: -20 to +10 dBm, rear access |
| TV Transport Stream Inputs | 2 x BNC, 75 ohms terminated (50 ohms connector per ASI rec.), configurable as SPMTE 310M, DVB-ASI, or DVB-T2MI 2 x BNC, 75 ohms terminated (50 ohms connector per ASI rec.), additional for DVB-ASI hierarchical modulation |
| DAB/DAB+/DMB Signal Inputs | ETI Input: BNC-female, user selectable 75 ohms or high impedance termination. 2x ETI (NI, G703) or 2x ETI (NA, G704), seamless input signal switch-over automatic optional EDI input: 10/100 Base T RJ-45, per ETSI TS 102 693 V1.1.2, 1 channel, UDP/DCP or TCP/DCP protocol |
| 10 MHz Reference Input | 1 x BNC, 50 ohms, rear access, -7 to +20 dBm, <20 dB return loss |
| 1 PPS Reference Input | 1 x BNC, 50 ohms, rear access |
| 10 MHz Reference Output | 1 x BNC, 50 ohms, front access |
| 1 PPS Reference Output | 1 x BNC, 50 ohms, front access |
| Ethernet | 1 front, RJ-45, customer access 1 rear, RJ-45, DHCP enabled network interface (SNMP) |
| Parallel Remote Control | 1 rear user remote |
| GPS Antenna Input | 1 x SMA, 50 ohms, rear access (optional) |
| RF Monitor Output | 1 x SMA, 50 ohms, front access |
| AC Power | |
|---|---|
| AC Power Input | 110 to 230 V AC, auto-ranging, ±15%, 47 to 63 Hz |
| Power Factor | >0.96 (typical 0.98) |
| Environmental | |
|---|---|
| Operational Temperature Range | 0° to 45° C (32° to 113° F) |
| Storage Temperature Range | -40 to +70° C |
| Relative Humidity | 0 to 95% |
| Altitude | Up to 3,000 m (9,843 ft) above sea level, derate 2° C (3.6° F) per 300 m (984 ft) of elevation |
| Cooling Method | Forced air-cooled, internal fans, airflow front to rear |
| Acoustic Noise | ≤65 dBa (front 1 m) |
| Physical Dimensions (H X W x D) | 2RU x 19 x 23 in. (44 x 483 x 584 mm) |
| Weight | 24.7 lbs (11.2 kg) |
| Shipping Weight | 30.0 lbs (13.6 kg) |
| Compliance | RoHS 2002/95/EC R&TTE 1999/5/EC Safety: EN 60215 EMC: EN 301-489-1 FCC Part 73, A/53 , A/110 DVB-T: ETSI EN 300 744 DVB-T2: ETSI EN 302 755 Rusia GOST Brazil ANATEL CE Marked |
| DTV COFDM Transmitter Specifications | |
|---|---|
| Rated Output Power | 50 W and 100 W models available, measured before mask filter |
| Shoulder Level | <-42 dB (typical <-50 dB) |
| MER | >37 dB (typical >40 dB) |
| END (per ETR 290) | ≤0.5 dB |
| Frequency Stability | ±150 Hz/month without PFC/GPS (2.3 x 10-7) |
| Internal GPS | Option |
| GPS Back up Time | 18.4 hours (maximum time drift 12.4 μS) 10° C variation day/night |
| Transmitter Processing Delay | Programmable up to 1 second maximum delay |
| Frequency Offsets | 1 Hz increments |
| Input Bit Rate | DVB-T: 4.976 to 31.668 Mbit/s DVB-T2: up to 50.28 Mbit/s ISDB-Tb: Per standard |
| Response Variation | 0.2 dB, typical across channel |
| Phase Noise | 10 Hz <-55 dBc/Hz 100 Hz <-85 dBc/Hz 1 kHz <-90 dBc/Hz 10 kHz <-95 dBc/Hz 100 kHz <-112 dBc/Hz 1 MHz <-130 dBc/Hz |
| Spurious Output | <-60 dBc (after mask filter and low pass filter) |
| Harmonics | <-60 dBc after mask filter, <-35 dB before mask filter |
| Spectrum Mask | Per standard. Filters for critical and non-critical mask available |
| Central Carrier Suppression | >75 dB relative to average power |
| Intermediate Frequency (IF) | 140 MHz |
| DAB/DMB+/DMB Transmitter Specification | |
|---|---|
| Rated Output Power | 75W and 150W models available, measured before mask filter |
| Systems | DAB/DAB+/DMB (OFDM) ETSI EN 300 401 & ETSI TR101 496-1 |
| Harmonic/Spurious Output | Complies with EN 302077-2 when used in conjunction with proper band pass filter |
| Shoulder Level | 35 dB minimum, >36 to 40 dB typical |
| Spectrum Mask | Per standard. Filters for critical and non-critical mask available |
| Monitoring Outputs | ETI Monitor 2.048 MHz Sync ETI Sync OFDM |
| ATSC Transmitter Specifications | |
|---|---|
| Rated Output Power | 90 W and 180 W models available, measured before mask filter |
| Shoulder Level | <-42 dB (typical <-50 dB) |
| EVM | <2% |
| SNR | >34 dB (typical >37 dB) |
| Frequency Stability | ±150 Hz/month without PFC/GPS (2.3 x 10-7) |
| Internal GPS | Option |
| GPS Back up Time | 18.4 hours (maximum time drift 12.4 μS) 10° C variation day/night |
| Transmitter Processing Delay | Programmable up to 1 second maximum delay |
| Frequency Offsets | 1 Hz increments |
| Input Bit Rate | 19.39 Mbit/s |
| Response Variation | 0.2 dB, typical across channel |
| Phase Noise | <-104 dBc/Hz @ 20 kHz offset (ATSC A/64) |
| Spurious Output | Meets FCC 5th and 6th report and order |
| Spectrum Mask | Per ATSC standard |
| Intermediate Frequency (IF) | 140 MHz |
| Transposer and Gap Filler (TV Only, all standards) | |
|---|---|
| RF Input Frequency Range | Band III 168 to 242 MHz, or Band IV/V 470 to 862 MHz |
| RF Input | SMA-Female, 50 ohms, rear access |
| RF Input Level | -70 dBm to -10 dBm |
| Maximum Input Level | 0 dBm |
| Adaptive Echo Cancellation | Included (applies to Gap Filler only) |
| Gain Margin | COFDM: -12 dB minimum, -15 dB typical ATSC: 0 dB |
| Adjacent Channel Rejection | >35 dB |
| Internal Transit Time | <6 µS |
| Echo Window Size | 5 µS |
| Echo Window Offset | 1.5 to 448 µS |
| Static Delay | 0 to 400 µS in steps of 100 µS |
| MER | Up to 34 dB, dependent on input |
| MER Degradation | <2 dB degradation referenced to input, at <34 dB input MER |
| Response Variation | 0.2 dB, typical |
| Spurious Output | <-60 dBc (after mask filter and low pass filter) |
| Harmonics | <-60 dBc (after mask filter and low pass filter), <-35 dB before mask filter |
