T770 Metrology-Grade Atomic Frequency Standard

Enhanced Grandmaster Clock (ePRTC)

The T770 is a metrology-grade rubidium atomic frequency standard, offering frequency stability, drift, and temperature coefficient up to 10 times better than ordinary rubidium clocks, and a one-day frequency stability comparable to that of a small cesium clock. It supports 1PPS and GNSS UTC synchronization, uses smooth frequency division to ensure a stable time base, and automatically maintains time in the event of a loss of lock. It features anti-interference algorithms and outputs multiple signals, including 10MHz, 5MHz, 1PPS, and Time of Departure (TOD). Options include 100MHz, 90MHz, and IRIG-B. Its 2U chassis makes it suitable for applications such as ePRTC master clocks, radar, communications, metrology, and aerospace measurement and control.

Enhanced Grandmaster Clock (ePRTC)

The T770 is a metrology-grade rubidium atomic frequency standard, offering frequency stability, drift, and temperature coefficient up to 10 times better than ordinary rubidium clocks, and a one-day frequency stability comparable to that of a small cesium clock. It supports 1PPS and GNSS UTC synchronization, uses smooth frequency division to ensure a stable time base, and automatically maintains time in the event of a loss of lock. It features anti-interference algorithms and outputs multiple signals, including 10MHz, 5MHz, 1PPS, and Time of Departure (TOD). Options include 100MHz, 90MHz, and IRIG-B. Its 2U chassis makes it suitable for applications such as ePRTC master clocks, radar, communications, metrology, and aerospace measurement and control.

Important Features

  • Enhanced Grandmaster Clock (ePRTC)
  • Very low environmental sensitivity, with a typical temperature coefficient of 2E-14/℃
  • Automatically calibrate the rubidium clock frequency using GNSS
  • Frequency stability 100000 seconds <4E-14
  • 1s\10s stability 3E-13
  • 5-channel 10MHz sinusoidal low-noise isolated amplifier output
  • 5MHz and 100MHz sine wave channels

Important Features

Test ItemConditionTechnical Indicators
Output frequency10MHz, 5 channelsBNC, sine wave 13±1dBm, 50Ω
Output frequency5MHz, 1 channelSame as 10MHz specification
Phase noise1Hz≤ -113dBc/Hz
Phase noise10Hz≤ -143dBc/Hz
Phase noise100Hz≤ -155dBc/Hz
Phase noise1kHz≤ -157dBc/Hz
Phase noise10kHz≤ -160dBc/Hz
Phase noise100kHz≤ -160dBc/Hz
distortionHarmonic≤ -40dBc
distortionNon-harmonic≤ -80dBc
Frequency stability1sStandard type: ≤5E-13, high performance type: ≤3E-13
Frequency stability10sStandard type: ≤5E-13, high performance type: ≤3E-13
Frequency stability100sStandard type: ≤1E-13, High performance type: ≤1E-13
Frequency stability1000sStandard type: ≤5E-14, high performance type: ≤4E-14
Frequency stability10000sStandard type: ≤5E-14, high performance type: ≤3E-14
Frequency stability100000sStandard type: ≤5E-14, high performance type: ≤4E-14
Drift rate/dayStandard type: ±3E-13, high performance type: ±1E-13
temperature coefficient/°CStandard type: ≤1E-13, high performance type: ≤5E-14
1PPS output4-channel TTL, BNCPulse width 100ms, rising edge <10ns, jitter <1ns, GNSS synchronization
1PPS input1 channel, TTL level
IRIG-B outputSupport (option)
TOD OutputSupport (option)
Receiver type72 channels, supporting GPS/QZSS, GLONASS, BeiDou, Galileo, and SBAS
Timing accuracy20ns
SensitivityTracking -166dBm, Cold Start -157dBm
size2U, 447 x 89 x 300mm
power supply220V±20%, 47Hz~63Hz
Working temperatureHost-10℃~+55℃
Working temperatureAntenna-40℃~+75℃
Storage temperature-45℃~+85℃
humidity95% non-condensing
Power consumption100W
Weight3.5kg

Typical phase noise

Frequency stability typical value

产品型号一览表

特点参数 T710T760T640T770TRA85TRS75TCA55TRM60CX5228CX910
外同步输入GNSS
1PPS
10MHz
频率输出10MHz正弦波 8路4路4路5路1-way1-way1-way4路
10MHz方波 6路1-way1-way
可选 1/5MHz100MHz100MHz5/100MHz
NTPIRIG-B
Stability1s <3E-12<5E-12<3E-12≤4E-13≤ 3×10⁻¹²≤ 6×10⁻¹²≤ 8×10⁻¹¹≤ 3×10⁻¹¹≤ 1.5×10⁻¹³≤ 1.1×10⁻¹³
10s <3E-12<5E-12<3E-12≤3E-13 ≤ 1.5×10⁻¹²≤ 2×10⁻¹²≤ 2.5×10⁻¹¹≤ 1×10⁻¹¹≤2×10-¹³≤2×10-¹³
100s <3E-13<5E-13<5E-12≤7E-14≤ 5×10⁻¹³≤ 6×10⁻¹³≤ 8×10⁻¹²≤ 3×10⁻¹²≤4×10⁻¹³≤5×10-¹³
日(GNSS锁定) <1E-12<1E-12<1E-12≤3E-14
Phase noise1Hz ≤-95dBc/Hz≤-95dBc/Hz≤-100dBc/Hz≤-120dBc/Hz≤ -95dBc/Hz≤ -85dBc/Hz≤ -50dBc/Hz≤ -85dBc/Hz≤ -123-126*
10Hz ≤-130dBc/Hz≤-130dBc/Hz≤-130dBc/Hz≤-140dBc/Hz≤ -130dBc/Hz≤ -120dBc/Hz≤ -80dBc/Hz≤ -120dBc/Hz≤ -145 ≤ -148
100Hz ≤-145dBc/Hz≤-145dBc/Hz≤-145dBc/Hz≤-155dBc/Hz≤ -150dBc/Hz≤ -145dBc/Hz≤ -115dBc/Hz≤ -140dBc/Hz≤ -155 ≤ -155
1kHz ≤-155dBc/Hz≤-155dBc/Hz≤-160dBc/Hz≤-160dBc/Hz≤ -160dBc/Hz≤ -150dBc/Hz≤ -130dBc/Hz≤ -140dBc/Hz≤ -160 ≤ -160
10kHz ≤-158dBc/Hz≤-158dBc/Hz≤-160dBc/Hz≤-160dBc/Hz≤ -160dBc/Hz≤ -155dBc/Hz≤ -140dBc/Hz≤ -145dBc/Hz≤ -165 ≤ -163
distortionHarmonic ≤-45dBc≤-45dBc≤-45dBc≤ -30dBc≤ -30dBc≤ -80dBc≤ -40dBc≤ -40dBc
Non-harmonic ≤-80dBc≤-80dBc≤-80dBc≤ -80dBc≤ -70dBc≤ -80dBc≤ -80dBc
Pulse outputNumber of way 4 4 4 4 1111
Synchronization accuracy 20ns20ns20ns10ns
Frequency drift rate/day±5×10⁻¹³±1×10⁻¹²≤3×10-¹¹¹±3×10⁻¹²≤3×10-¹⁰≤1×10-¹⁰
物理电气特性Working temperature -10℃~+55℃-10℃~+55℃-10℃~+55℃-10℃~+55℃-40℃~+65℃-40℃~+65℃-40℃~+85℃-40℃~+75℃ -20℃~+70℃0℃~+40℃
存健温度 -45℃~+85℃-45℃~+85℃-45℃~+75℃-55℃-+85℃-40℃~+85℃-40℃~+85℃-55℃~+125℃-55℃~+100℃-40℃~+85℃-55℃~+125℃
power supply 220V±20%220V±20%220V±20%220V±20%+12V~+15V或+24V+12V~+15V,±4% +3.3V±5% +5V±4%+12VDC+14~+125℃
Rate of work 50W60W60W预热70W,稳态≤30W预热≤45W,稳态≤15W预热≤28.5W,稳态≤14.5W预热≤10W,稳态≤1.8W预热≤15W,稳态≤8W≤7.2W≤27W
External Dimension 2U半宽2U2U2U116mm×79mm×38mm68mm×68mm×18mm 41mm×36mm×17mm51mm×51mm×18mm50mm×50mm×19mm5inch×3inch×3inch
Weight 2Kg5Kg3.5Kg5kg≤500g≤300g≤50g<100g
驯服及守时After 24h of synchronization 200ns200ns10us30ns(同步20d后)同步24h后≤1us≤1us≤1us

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