QST102‑3 specifications - AWS810

AWS810 System Description
Document code
M212417EN
Revision
H
ft:locale
en-US
Product
AWS810
Document type
Technical description
QST102‑3 operating environment
Property Description/Value

Operating temperature

−40 … +55 °C (−40 … +131 °F)

Storage temperature

−55 … +75 °C (−67 … +167 °F)
QST102‑3 inputs and outputs
Property Description/Value
Output frequency GOES: 401.701000–402.099250 MHz (x532 300 bps channels and x177 1200 bps channels)
Frequency stability

QST102‑3 corrects to typically less than ±20 Hz using GPS‑based algorithm

Long‑term TCXO maintained to < ±125 Hz

Short‑term stability: < ±1 Hz/s
Output 50 Ω impedance, short and open circuit protected
RF power output Effective Isotropic Radiated Power (EIRP) with approved 11 dB gain antenna assuming 1 dB cable loss: 37–47 dBm in 0.5‑dB steps nominal
DC power

10.5–16 V

< 5 mA standby (typical 2.8 mA at 12 V)

< 50 mA during GPS acquisition (typical 25 mA at 12 V)

< 2.5 A when transmitting:

  • 1200 bps: Typically 1.7–1.8 A at 12 V
  • 300 bps: Typically 1.0–1.1 A at 12 V
Control interface RS‑232 and RS‑485
Time‑of‑day clock Accurate to 20 ms
Modulation message format

8‑ary Phase Shift Keying (PSK) with Square Root Raised Cosine Filtering

Rate 2/3 trellis coding and data scrambling
Data rate/Symbol rate 300 bps (150 SPS ±0.025 %) and 1200 bps (600 SPS ±0.025 %)
Diagnostics available to the DCP, storage, and transmission

Forward power

Reflected power

Internal temperature

Before and during transmission

Voltage reading

Before and during transmission

Latitude and longitude

Altitude

Time of last GPS acquisition

Time of last GPS acquisition missed

GPS status

Fail‑safe status

Voltage Standing Wave Ratio (VSWR)
QST102‑3 compliance
Property Description/Value
Certification NESDIS Certification Number 12142012; December 20, 2012
Harmonics Suppressed > 60 dBc
Spurious Meets NESDIS spurious signal spectral mask for all data rates
Phase noise Meets NESDIS Carrier Phase Noise, Phase Modulation Bias, and RMS Phase Error requirements specified in 300 and 1200 GOES DCPRS Certification Standard V2.0
QST102‑3 mechanical specifications
Property Description/Value
Dimensions (H × W × D) 103 × 141 × 24 mm (4.06 × 5.56 × 0.96 in)
Weight 0.5 kg (1.1 lb)