TRS75 Small and High-performance Rubidium atomic clock

Learn about our Small and High-performance Rubidium atomic clock

The TRS75 is a compact, high-performance rubidium atomic clock with a frequency stability of 6E-12/s, comparable to larger products. It integrates 1PPS discipline and output, a 10MHz square wave output, and external 10MHz signal calibration. It can be automatically calibrated using cesium or hydrogen clock signals and can also be used as a 10MHz frequency comparator. Its highly integrated interface outputs all signals through a single DSUB9 connector, making it suitable for installation in confined spaces. It is suitable for applications in radar, communications, metrology calibration, astronomy, electronic countermeasures, and aerospace measurement and control.

Learn about our Small and High-performance Rubidium atomic clock

Important Features

Small volume 76mm×76mm×18mm
The short-term stability is better than the 6E-12/1s
Room temperature stable power ≤ 14.5W
Stability typical value 2E-12/10s
Typical values of phase noise -125dBc/Hz@10Hz
1PPS taming and 10MHz calibration

Important Features

Test Item	Condition	Technical Indicators
Output frequency		10MHz，1-way sine wave（50Ω，≥7dBm）and a 1-way 3VTTL square wave
Factory accuracy		≤5×10-¹¹¹
Frequency control	Voltage pressure contorl	0~5V，with the total range of at least ±1.5×10⁻⁹
Frequency control	Instruction adjustment	Coarse adjustment range of at least ±1×10⁻⁶, fine adjustment range of at least ±1.5×10⁻⁹, and resolution better than 1×10⁻¹²
Locking time	Indoor temperature	≤5min
Frequency stability	1s	≤1×10-¹¹; AD6: ≤6×10-¹²
Frequency stability	10s	≤3×10-¹²; AD6: ≤2×10-¹²
Frequency stability	100s	≤1×10-¹²; AD6: ≤6×10-¹³
Phase noise	1Hz	≤-85dBc/Hz
Phase noise	10Hz	≤-120dBc/Hz
Phase noise	100Hz	≤-145dBc/Hz
Phase noise	1kHz	≤-150dBc/Hz
Phase noise	10kHz	≤-155dBc/Hz
Frequency drift rate	/day	±1 x 10-¹¹; FD5: ±5 x 10-¹²; FD3: ±3 x 10-¹²; FD1: ±1 x 10-¹²
Frequency reproducibility	Switch 24h	±2 x 10-¹¹
Temperature and Frequency Characteristics		≤5×10-¹⁰; TC3: ≤3×10-¹⁰; TC1: ≤1×10-¹⁰; TC0.5: ≤5×10-¹¹
Harmonic And Clutter		harmonic≤-30dBc，clutter≤-70dBc
Working temperature	Bottom plate temperature	-40℃~+65℃
Storage temperature		-40℃~+85℃
power supply	±4%	+12V~+15V
Rate of work	Preheat	≤28.5W
Rate of work	Steady state （+25℃）	≤14.5W
External Dimension	Body size	68mm×68mm×18mm
External Dimension	Bottom plate size	76mm×76mm
1PPS input		+3V~+5V TTL，Judder100ns
1PPS output		Rising edge/falling edge: ≤10ns, pulse width: 1us~999ms
Taming accuracy	After 24h of synchronization	Taming jet lag：±50ns，Time-keeping accuracy：≤1us@24h，Frequency accuracy：≤1×10⁻¹²@24h

Typical phase noise

Frequency stability typical value

Product Model List

Specifications		T710	T760	T640	T770	TRA85	TRS75	TCA55	TRM60	CX5228	CX910
External Synchronization Input	GNSS	✓	✓	✓	✓	—	—	—	—	—	—
	1PPS	✓	—	—	✓	✓	✓	✓	✓	—	—
	10MHz	—	—	—	✓	—	—	—	—	—	—
Frequency Output	10 MHz sine wave	8-channel	4-channel	4-channel	Route 5	1-way	1-way	—	—	1-way	4-channel
	10 MHz square wave	Route 6	—	—	—	—	—	1-way	1-way	—	—
	Optional	1/5 MHz	100MHz	100MHz	5/100 MHz	—	—	—	—	—	—
		—	NTP	IRIG-B	—	—	—	—	—	—	—
Stability	1s	<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
	Day (GNSS Lock)	<1E-12	<1E-12	<1E-12	≤3E-14	—	—	—	—	—	—
Phase noise	1Hz	≤-95dBc/Hz	≤-95dBc/Hz	≤ -100 dBc/Hz	≤-120dBc/Hz	≤ -95 dBc/Hz	≤ -85 dBc/Hz	≤ -50 dBc/Hz	≤ -85 dBc/Hz	≤ -123	-126*
	10Hz	≤-130dBc/Hz	≤-130dBc/Hz	≤-130dBc/Hz	≤-140dBc/Hz	≤ -130 dBc/Hz	≤ -120 dBc/Hz	≤ -80 dBc/Hz	≤ -120 dBc/Hz	≤ -145	≤ -148
	100Hz	≤-145dBc/Hz	≤-145dBc/Hz	≤-145dBc/Hz	≤-155dBc/Hz	≤ -150dBc/Hz	≤ -145dBc/Hz	≤ -115 dBc/Hz	≤ -140dBc/Hz	≤ -155	≤ -155
	1kHz	≤-155dBc/Hz	≤-155dBc/Hz	≤-160dBc/Hz	≤-160dBc/Hz	≤ -160dBc/Hz	≤ -150dBc/Hz	≤ -130 dBc/Hz	≤ -140dBc/Hz	≤ -160	≤ -160
	10kHz	≤-158dBc/Hz	≤-158dBc/Hz	≤-160dBc/Hz	≤-160dBc/Hz	≤ -160dBc/Hz	≤ -155dBc/Hz	≤ -140dBc/Hz	≤ -145dBc/Hz	≤ -165	≤ -163
distortion	Harmonic	≤-45dBc	≤-45dBc	≤-45dBc	—	≤ -30dBc	≤ -30dBc	—	≤ -80dBc	≤ -40dBc	≤ -40dBc
	Non-harmonic	≤-80dBc	≤-80dBc	≤-80dBc	—	≤ -80dBc	≤ -70dBc	—	—	≤ -80dBc	≤ -80dBc
Pulse output	Number of way	4	4	4	4	1	1	1	1	—	—
	Synchronization accuracy	20ns	20ns	20ns	10ns	—	—	—	—	—	—
Frequency drift rate	/day	—	—	—	—	±5×10⁻¹³	±1×10⁻¹²	≤3×10-¹¹¹	±3×10⁻¹²	≤3×10-¹⁰	≤1×10-¹⁰
Physical and Electrical Characteristics	Working temperature	-10℃~+55℃	-10℃~+55℃	-10℃~+55℃	-10℃~+55℃	-40℃~+65℃	-40℃~+65℃	-40℃~+85℃	-40℃~+75℃	-20℃~+70℃	0℃~+40℃
	Cunjian Temperature	-45℃~+85℃	-45℃~+85℃	-45°C to +75°C	-55°C to +85°C	-40℃~+85℃	-40℃~+85℃	-55℃~+125℃	-55℃~+100℃	-40℃~+85℃	-55℃~+125℃
	power supply	220V±20%	220V±20%	220V±20%	220V±20%	+12V to +15V or +24V	+12V–+15V, ±41 TP3T	+3.3V±5%	+5V±4%	+12VDC	+14 to +125°C
	Rate of work	50W	60W	60W	70W warm-up, steady-state ≤ 30W	Warm-up ≤ 45 W, steady-state ≤ 15 W	Start-up power ≤ 28.5 W, steady-state power ≤ 14.5 W	Warm-up ≤ 10 W, steady-state ≤ 1.8 W	Warm-up ≤ 15 W, steady-state ≤ 8 W	≤7.2 W	≤27 W
	External Dimension	2U half-width	2U	2U	2U	116mm×79mm×38mm	68mm×68mm×18mm	41mm×36mm×17mm	51mm×51mm×18mm	50mm×50mm×19mm	5 inches × 3 inches × 3 inches
	Weight	2Kg	5 kg	3.5 kg	5 kg	≤500g	≤300 g	≤50 g	<100g	—	—
Well-behaved and punctual	After 24h of synchronization	200 ns	200 ns	10 us	30 ns (20 days after synchronization)	≤1 µs after 24 hours of synchronization	≤1 us	—	≤1 us	—	—

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