HC976
HC976 Triple-band Helical Antenna + L-band
Frequency Coverage:

GNSS/QZSS-L1/L2, QZSS-L6, GLONASS-G1/G2, Galileo-E1/E6, BeiDou-B1/B3 + L-band correction services

The HC976 helical antenna is designed and crafted for precision positioning, covering
the GPS/QZSS-L1/L2, QZSS-L6, GLONASS-G1/G2, Galileo-E1/E6, and BeiDou-B1/B3
frequency bands, including the satellite-based augmentation system (SBAS) available
in the region of operation [WAAS (North America), EGNOS (Europe), MSAS (Japan), orGAGAN (India)], as well as L-band correction services.
Weighing only 42 g, the lightweight and compact HC976 features a precision-tuned helix
element that provides excellent axial ratios and operates without the requirement of aground plane, making it ideal for a wide variety of applications, including unmanned
aerial vehicles (UAVs).
The HC976 features an industry-leading low current, low-noise amplifier (LNA) that
includes an integrated low-loss pre-filter to prevent harmonic interference from highamplitude signals, such as 700 MHz band LTE and other nearby in-band cellular signals.
All Tallysman® helical antenna elements are protected by a robust military-grade IP67compliant plastic enclosure. The enclosure’s base provides two threaded inserts forsecure attachment , as well as a rubber O-ring around the outer edge to seal theantenna base and its integrated SMA connector.
Tallysman®’s HC976 has passed a rigorous 30-hour vibration test procedure, consistingof five cycles of 2-hour tests per axis (x, y, z):• Cycle 1: 1.05 Grms;• Cycle 2: 1.20 Grms;• Cycle 3: 1.35 Grms;• Cycle 4: 3.67 Grms;• Cycle 5: 3.67 Grms.

Applications

FeaturesBenefits• Autonomous unmanned aerial vehicles (UAVs)• Precision GNSS positioning• Precision land survey positioning• Mission-critical GNSS timing• Network timing and synchronization• Sea and land container tracking• Fleet management and asset tracking• Marine and avionics systems• Law enforcement and public safety• Very low noise preamp: 1.8 dB• Axial ratio: ≤ 0.5 dB at zenith• LNA gain: 28 dB typ. or 35 dB typ.
• Low current: 15 mA typ. or 21 mA typ.
• ESD circuit protection: 15 kV• Invariant performance from 2.2 to 16 VDC• IP67, REACH, and RoHS compliant• Extremely lightweight (42 g)• Ideal for RTK and PPP surveying systems• Excellent RH circular polarized signal reception• Great multipath rejection• Increased system accuracy• Excellent signal-to-noise ratio• Industrial temperature range• Rugged design, ideal for harsh environments

About Tallysman: With global headquarters and manufacturing in Ottawa, Canada, Tallysman is a leading manufacturer ofhigh-precision antennas and components for Global Navigation Satellite System (GNSS) applications. Tallysman’s mission isto support the needs of a new generation of positioning systems by delivering unprecedented antenna precision atcompetitive prices. Learn more at www.tallysman.com
Revision:

1.0Contact us:
info@tallysman.com
T: +1 613 591-3131

HC976 Triple-band Helical Antenna + L-band
Frequency Coverage:

GNSS/QZSS-L1/L2, QZSS-L6, GLONASS-G1/G2, Galileo-E1/E6, BeiDou-B1/B3 + L-band correction services

Antenna

Low Noise Amplifier (LNA) - Measured at 3.0 VDC and 25°C

TechnologyTriple-frequency, RHCP quadrifilar helix
Frequency Bandwith
Gain

Axial Ratio

dBic typ. at ZenithdB at Zenith

L12.5

≤ 0.5

L21.4

≤ 0.5

GNSS

GPS / QZSSLower Band

1217 - 1300 MHz

L-band corrections services

1539 - 1559 MHz

Upper Band

1559 - 1606 MHz

Out-of-Band Rejection> 60 dB @ < 1000 MHz> 33 dB @ < 1100 MHz> 30 dB @ > 1350 MHz

L5--

G1

1.5

≤ 0.5

G22.6

≤ 0.5

G3-

-

E1

2.5

≤ 0.5

E5a--Architecture

Pre-filter → LNA

E5b--Gain

28 dB typ. or 35 dB typ.

E6

1.6

≤ 0.5

Noise Figure

1.8 dB typ.

B1

2.5

≤ 0.5

VSWR

< 1.5:1 typ. | 1.8:1 max.

B2--

Supply Voltage Range

2.2 to 16 VDC

B2a--Supply Current

15 mA typ. (28 dB) | 21 mA typ. (35 dB)

B3

2.3

≤ 0.5

ESD Circuit Protection

15 kV air discharge

L5--

P 1dB Output

12 dBm @ L1

L6

1.6

≤ 0.5

Group Delay Variation

5 ns @ L1 | 5 ns @ L2

1.5

≤ 0.5

Iridium--

Globalstar--

GLONASS

Galileo

BeiDouIRNSS / NavICQZSSL-band correction services> 32 dB @ < 1500 MHz> 30 dB @ > 1700 MHz

Mechanical Diagram

Satellite Communications

Phase Centre

Phase Centre Variation (PCV)± 3.0 mm (all freq.)

Phase Centre Offset (PCO)

32 mm @ L1 |38 mm @ L2/L6

Mechanicals
Mechanical Size

44.2 mm (dia.) x 62.4 mm (h.)

Weight

42 g

Available Connectors

SMA

Radome / Enclosure

Radome and Base: EXL9330

Mount

3 M2.5 screws

Environmental
Operating Temperature-40 °C to + 85 °C

Storage Temperature-50 °C to + 95 °C

Random Vibration

MIL-STD-810E - Test method 514.5
4 hours per axis (x, y, z) at 3.674 Grms

Shock and Drop

-Salt Fog-IP Rating (housing)

IP67

Compliance

IPC-A-610, FCC, RED / CE Mark, RoHS, REACH

Warranty:
Parts and Labour

3-year standard warranty

Ordering Information
Part Number
where xx = gain (28 or 35 dB)
Please refer to our Ordering Guide to review available radomes and connectors at:https://www.tallysman.com/resource/tallysman-ordering-guide/© 2019 Tallysman Inc. All rights reserved. Tallysman, the “When Precision Matters” tag line and the Tallysman logo are trademarks or registeredtrademarks of Tallysman Inc. and/or its affiliates in Canada and certain other countries. All other trademarks mentioned in this document are theproperty of their respective owners. The information presented is subject to change without notice. Tallysman assumes no responsibility for any
errors or omissions in this document. Tallysman Wireless Inc. hereby disclaims any or all warranties and liabilities of any kind.

Revision:

1.033-HC976-xx

www.tallysman.com