MX920 Base Station/Repeater
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Minimum performance to exceed the following for 135MHz to 520MHz*:
- AS4295-1995,
- R&TTE EC Directive 1995/05/EC
- EN300 086 –1,2 (2001- 03),
- EN 300 113, EN 301 489 – 1,5 (2002 – 08)
- EN 60950 (2000)
- RFS25, RFS26, RFS32,
- TIA/EIA-603,
- BAPT 225 ZV 1/2098 (German soft keying),
- FCC Part 22, 74, 90, 90.210, 80.475,
- MIL-STD-810E (Parts thereof),
* Conforms but not all bands approved.
GENERAL
Frequency Range: Coverage 148-520 MHz.
New!! The MX920 product is now capable of operating over extended frequency limits
| Base Model | Nom. Band | SW. BW | RX Frequency EX-Limit Low |
RX Frequency EX-Limit Hi |
TX Frequency EX-Limit Low |
TX Frequency EX-Limit Hi |
|---|---|---|---|---|---|---|
| MX920D3 | 148-174 MHz | 26 | 145 MHz* | 178 MHz | 132 MHz | 180 MHz |
| MX920L3 | 350-385 MHz | 35 | 335 MHz | 390 MHz | 325 MHz | 408 MHz |
| MX920N2 | 400-435 MHz | 35 | 380 MHz | 445 MHz | 380 MHz | 445 MHz |
| MX920O2 | 435-470 MHz | 35 | 420 MHz | 480 MHz | 420 MHz | 485 MHz |
| MX920P2 | 450-485 MHz | 35 | 440 MHz | 500 MHz | 450 MHz | 500 MHz |
| MX920Q | 485-520 MHz | 35 | 475 MHz | 530 MHz | 460 MHz | 520 MHz |
Note# When operating the MX920 in the extended frequency limits, the switching bandwidth (SW.BW) still applies. Depending on the user frequencies, some re-alignment may be necessary when working in the extend frequency range.
| Feature |
MX920
|
|---|---|
| Synthesis Method |
Non-mixing PLL. Fractional N synthesizer. |
| Modulation | Direct FM two-point method. |
| Channel Spacing | Programmable 25kHz / 12.5 kHz |
| Synthesizer Step Size | 6.25kHz or 5kHz auto select |
| Channels |
99 front panel selectable, 255 PC software selectable |
| Supply Voltage | 13.8 +/- 20% or optional AC mains input |
| DC Power Consumption |
<250 mA receive, typ 230mA <10A for 50W TX RF, typ 7.8A |
| Operating Temperature | -30 to +60C |
| Physical Size | 120mm Height x 355mm Width |
| Standard LED indicators | Power, RX, TX, Tone, Alert, Repeater |
| Standard Switches | Repeater ON/OFF, Accessory ON/OFF |
| Standard Controls | Volume, Squelch |
| Interface | Front panel Microphone accessory socket. |
| Weight | 8kg to 15kg depending on options |
TRANSMITTER
MEASURED IN ACCORDANCE WITH TIA/EIA-603 STANDARDS
| Transmitter Feature |
MX920
|
|---|---|
| RF Power Output | 1W to 50W |
| Frequency Stability
>300MHz < 300MHz |
–10 to 60C for 1.5PPM, –30
to -10C for 2.5PPM –10 to 60C for 2.5PPM, –30 to -10C for 5PPM |
| Audio Response | Flat within +1,-3dB across BW |
| Audio Bandwidth | 300Hz to 3000Hz |
| Modulation Distortion | Less than 3% @ 60% deviation |
| S/N Ratio | Better than 46dB (WB). Better than 42dB (NB). |
| Spurii | Better than -90dBc |
| RF Switching Bandwidth | Full Sub band |
| RF Switching Bandwidth PA | Full Sub band |
| Duty Cycle | 100% for 50W RF output |
| RF Rise Time | <10mS with continuous VCO selected <200mS with VCO in cold standby |
RECEIVER
MEASURED IN ACCORDANCE WITH TIA/EIA-603 STANDARDS
| Receiver Feature |
MX920
|
|---|---|
| Sensitivity | Better than -117dBm for 12dB SINAD, typ –120dBm |
| Selectivity 135-520MHz | More than 85dB for 25kHz adj channel.
more than 75dB for 12.5kHz adj channel |
| Audio Bandwidth | 300Hz to 3000Hz (+1,-3dB) |
| Image Freq Rejection | Better than 100dB |
| Spurious Response Immunity | Better than 80dB |
| Intermodulation Immunity | Better than 80dB |
| Blocking | Better than 100dB at +/- 1MHz point |
| Distortion | Less than 3% @ 60% deviation |
| Frequency Stability | 1.5PPM for –10 to 60C, 2.5PPM for –30 to -10C |
| S/N Ratio | Better than 46dB (WB) Better than 40dB (NB) |
| Co-Channel Rejection | Better than 5dB |
| RF Switching Bandwidth | Equal to Sub band allocation |
| Receiver Front End BW | Equal to Sub band allocation |
| Receiver Audio Power | 3 Watts nominal, 5 Watts peak |
ANCILLARIES and FEATURES summary
- Full Duplex Base Station or Repeater selectable from front panel
- Fully Programmable / Configurable via PC or serial device.
- System independent, no additional software program required.
- High Speed CTCSS, Full Duplex DCS/DPL
- Remote controllable Multi tone CTCSS community decoder
- 100% full power duty cycle
- 5 Tone signaling
- Multi staged TX VF processing with triple limiters
- Flash Firmware Upgrade Capable
- Battery backup system ready
- Built In Test Equipment (B.I.T.E.) and remote diagnostics
- Broad Band High Efficiency LDMOS PA module
- RX & TX Switching BW covers full sub band
- Fast Serial Data Interface
- Full Digital alignment and calibration
- Low RFI and EMI emission design
- Controlled TX RF envelope
- Low current consumption
- DTMF encoder and decoder
- Latest technology, full SMD
- Advanced and optimized RF design
- High performance 16 bit Flash processor
- Programmable 12.5/25kHz channel spacing
- Configurable Function Front Panel LEDs
- Ultra bright LEDs viewable in Sunlight with digital intensity control
- Simple and fast disassembly for service
- Precision internal shielding system
- Minimal technician adjustments for future maintenance
- Design spec –40 to 70 degrees C
- Low aging oscillators
- Universal microphone input circuit
- Minimal interconnections
- Options cans be easily retrofitted
- Minimal mechanical adjustments
- Front end RX filter never needs realignment
- Built in TX modulation alignment circuit
- Built in auto alignment software guides technician
- Fast and simple disassembly
- Built on proven technology
- Configuration password protected
- Virtual elimination of internal wiring
- Field swappable modules include auto alignment
- Elimination of helical filters, quadrature coils, MCF matching and trim potentiometers
OPTIONS
- Desk Mic
- Internal PSU
- Internal Duplexer
- Internal Simplex relay
- Internal Battery backup
- Horizontal or vertical desktop case
- Rackmount tray
- Wall mountable kit
- Virtual PC Console including ANI / CTCSS / DCS / 5TONE / DTMF display (future proposed)
NOTES:
- Not all items and features initially available.
- Future software releases and features can be Flash Memory upgraded.
- Due to ongoing development we reserve the right to alter specifications without notice.
