TRM60 Miniature Rubidium atomic clock

Learn about our Miniature Rubidium atomic clock

The RM60 is a miniature intelligent atomic clock that supports 1PPS discipline and output, and operates in -40°C to +75°C environments. It offers a variety of performance options: the standard model offers 24-hour discipline and timekeeping of <1μs, while the high-performance version can replace imported miniature atomic clocks, offering excellent frequency stability, phase noise, and temperature drift performance. It is suitable for applications in power, communications, test equipment, frequency sources, electronic countermeasures, and unmanned equipment.

Learn about our Miniature Rubidium atomic clock

Important Features

Small volume 51*51*18mm, compatible with most miniature atomic clocks
The short-term stability is better than the 3E-11/1s
Room temperature stable power ≤ 8W (measured 5.5W)
1PPS Input and 1PPS Output Functions
+5V power supply, can maintain performance within -40~+75℃

Important Features

Test Item	Condition	Technical Indicators
Output frequency		10MHz，1-way square wave ，3.3V CMOS
Factory accuracy	After calibration	≤5×10-¹¹¹
Frequency control	Voltage pressure contorl	0~5V, total range at least ±4×10⁻⁹, resolution better than 1×10⁻¹¹
CNC calibration		Fine adjustment range > ±4×10⁻⁹, resolution better than 1×10⁻¹², coarse adjustment range > ±1×10⁻⁶
Locking time	Indoor temperature	≤5min
Frequency stability	1s	Standard：≤1×10⁻¹⁰；A5：≤5×10⁻¹¹；A3：≤3×10⁻¹¹
Frequency stability	10s	Standard：≤3×10⁻¹¹；A5：≤1.6×10⁻¹¹；A3：≤1×10⁻¹¹
Frequency stability	100s	Standard：≤1×10⁻¹¹；A5：≤5×10⁻¹²；A3：≤3×10⁻¹²
Phase noise	1Hz	Standard：/；PN65：≤-65dBc/Hz；PN85：≤-85dBc/Hz
Phase noise	10Hz	Standard:≤-90dBc/Hz；PN65：≤-100dBc/Hz；PN85：≤-120dBc/Hz
Phase noise	100Hz	Standard:≤-120dBc/Hz；PN65：≤-130dBc/Hz；PN85：≤-140dBc/Hz
Phase noise	1kHz	≤-140dBc/Hz
Phase noise	10kHz	≤-145dBc/Hz
Frequency drift rate	/day	±2.5 x 10-¹¹; FD10: ±1 x 10-¹¹; FD5: ±5 x 10-¹²; FD3: ±3 x 10-¹²
Temperature and Frequency Characteristics	0~70℃	≤7 x 10-¹⁰; TC50: ≤3 x 10-¹⁰; TC20: ≤1 x 10-¹⁰; TC10: ≤5 x 10-¹¹¹
Temperature and Frequency Characteristics	-40~75℃	≤1×10-⁹; ≤5×10-¹⁰; ≤2×10-¹⁰; ≤1×10-¹⁰
Working temperature	Bottom plate temperature	-40℃~+75℃
Storage temperature		-55℃~+100℃
power supply	±4%	+5V
Rate of work	Preheat	≤15W (if it is not necessary to adapt to -40℃ ,it can be reduced)
Rate of work	Steady state(indoor temperature)	≤8W (measured about 5.5W)
External Dimension	Body size	51mm×51mm×18mm
Weight		<100g
1PPS input		+3V~+5V TTL，Judder100ns
1PPS output		Rising edge/falling edge: ≤10ns, pulse width: 1ms
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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