ST-QM Series

ST-QM Series

The ST-QM Series represents the top end of licensed microwave products available in the market today. In a single radio+antenna system, the radio link features a true 1 Gbps full-duplex (2 Gbps aggregate) throughput without resorting to complex multi-radio N+0 configuration. The single unit gigabit operation has been available with E-Band systems at 70/80GHz, but with a much shorter link distance. ST-QM operating at 18/23 GHz now will allow customers to extend the same gigabit rate to long-distance applications without compromising the link availability up to 5km in most rain regions and the built-in ACM feature will protect the link reliability for longer link distances. The compact form factor to achieve the gigabit rate means cost savings due to easy equipment purchase and simplified tower logistics due to smaller, lighter tower loading and lower tower lease expenses. The ST-QM Series features an internal 5 port GigE switch with one RJ-45 port and four SFP ports for maximum flexibility in interface choices. The IP66-based enclosure allows for outdoor deployments with a wide temperature range.
The QM Series radio features high output power up to 26dBm for long-distance with a variety of frequency band and channel BW options. The addition of 256QAM modulation adds capacity for shorter-hop applications with a full-rate gigabit connection. The ACM feature will ensure that the radio will automatically switch to a more robust modulation in the event that the local RF condition worsens, thus preserving the link connection in most cases.
Network Management can easily be performed with the built-in web GUI with either HTTP or secure HTTPS protocols. SNMP support is provided so that the radio systems can be easily integrated into the customer’s NMS environment.

SKU ST-QM Series Category

Feature Summary

    • Ultra high capacity — 1,000 Mbps (1 Gbps), Full Duplex link
    • Internal 5-port gigabit Ethernet switch
    • Proprietary channel bonding — up to 150 MHz bandwidth
    • Modulation up to 256QAM for maximum bit efficiency
    • Optional 256-bit AES encryption
    • (4) SFP Ethernet ports for maximum flexibility in interface choices
    • Adaptive Coding/Modulation (ACM).
    • Full Capacity model — no need for costly key upgrades in the future

Technical Summary

    • Frequency Bands: 18 / 23 GHz
    • Channel BW
      40/50/80/100/150 MHz (18GHz)
      50/100/150 MHz (23GHz)
    • Tx Power: 17 to 26 dBm
    • Modulation: QPSK to 256 QAM
    • Temp Range: -40 to 60 C
    • Interfaces:
      (1) GE RJ-45 copper port
      (4) GE SFP ports for fiber inputs
    • Power Consumption: 70W, Max.
    • Optional POE input
    • Dimensions: 12” x 7.25” (dia x depth)
    • Weight: 14 lbs



18 GHz

23 GHz

Frequency Band  

17.7 — 19.7 GHz

21.2 — 23.6 GHz

T/R Spacing  

1560 MHz

1200 MHz

Frequency Plan  

ITU-R F.595-6, Annex 2 / FCC Part 101.147

ITU-R F.637-3, Annex 4 / FCC Part 101.147

Data Rate & Modulation  




               256 QAM

40/50/80/100/150 MHz 

68/85/136/170/255 Mbps

136/170/272/340/509 Mbps

204/255/408/509/764 Mbps

272/340/543/679/1000 Mbps

50/100/150 MHz 

85/170/255 Mbps

170/340/509 Mbps

255/509/764 Mbps

340/679/1000 Mbps

Tx Power Output





26 dBm

24 dBm

20.5 dBm

17 dBm

25 dBm

24 dBm

20.5 dBm

17 dBm

Rx Sensitivity @1E-6





40/50/80/100/150 MHz

-80/-79/-77/-76/-74 dBm

-74/-73/-71/-70/-68 dBm

-68/-67/-65/-64/-62 dBm

-62/-61/-59/-58/-56 dBm

50/100/150 MHz

-79/-76/-74 dBm

-73/-70/-68 dBm

-67/-64/-62 dBm

-61/-58/-56 dBm

Forward Error Correction

Reed-Solomon RS(204,188)

RF Protocol

Adaptive Coding and Modulation (ACM)


(1) RJ-45 1000Base-T, (4) SFP ports supporting fiber SM & MM interface

Frame Size

Jumbo packets up to 10,000 bytes, per port rate limiting


Web-based HTTP / HTTPS, SNMP support with MIB-II, Syslog event support, RADIUS


AES 256 bit encryption (Optional)


-48 V DC input (-38 to -70 V DC range), Proprietary POE option

Size & Weight

12” diameter x 7.25 depth (30 x 19 cm); 14 lbs (6.3 kg)


Operating temperature –40 to +60C, EN 300 019 Class 4.1

Altitude up to 4,500m, IP66 Enclosure


UC FCC Part 101; EMC/EMI FCC Part15, Class B

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