Shenzhen Meigaolan Electronic Instrument Co. Ltd
| Payment Terms | T/T |
| Supply Ability | in stock |
| Product name | Rb frequency standard |
| Output frequencies | 10 MHz sine, 5 MHz sine, 1 pps pulse (10 µs wide) |
| Amplitude | 0.5 Vrms, ±10 % |
| Operating temperature | +10 °C to +40 °C |
| Functions | Tested, in Full Working Conditions |
| Interfaces | RS-232 |
| Brand Name | SRS |
| Model Number | FS725 |
| Place of Origin | USA |
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Product Specification
| Payment Terms | T/T | Supply Ability | in stock |
| Product name | Rb frequency standard | Output frequencies | 10 MHz sine, 5 MHz sine, 1 pps pulse (10 µs wide) |
| Amplitude | 0.5 Vrms, ±10 % | Operating temperature | +10 °C to +40 °C |
| Functions | Tested, in Full Working Conditions | Interfaces | RS-232 |
| Brand Name | SRS | Model Number | FS725 |
| Place of Origin | USA | ||
| High Light | Stanford Rubidium Frequency Standard ，5 MHz Rubidium Frequency Standard ，0 MHz Rubidium Frequency Standard | ||
The FS725 integrates a rubidium oscillator (SRS model PRS10), a low noise universal AC power supply, and distribution amplifiers in a compact half-width 2U chassis. It provides stable and reliable performance, with an estimated 20 year aging of less than 5 × 10⁻⁹ and a demonstrated rubidium oscillator MTBF of over 200,000 hours. The FS725 is an ideal instrument for calibration and R&D laboratories, or any application requiring a precision frequency standard.
There are two 10 MHz and one 5 MHz outputs with exceptionally low phase noise of (-130 dBc/Hz at 10 Hz offset) and one second Allan Variance of (<2 × 10⁻¹¹). The FS725 can be phase-locked to an external 1 pps reference (like GPS) providing Stratum 1 performance. A 1 pps output is also provided that has less than 1 ns of jitter, and may be set with 1 ns resolution.
Up to three internal distribution modules can be added to the FS725. Each module has four 10 MHz outputs, one 5 MHz output, and one 1 pps output, all with the same low phase noise, harmonic distortion and jitter.
An RS-232 interface allows direct communication with the rubidium oscillator. Using the provided Windows software, you can easily monitor and control 1 pps timing, and determine the instrument's operational status.
There are two alarm relays that indicate the status of the rubidium oscillator lock state and synchronization to an external 1 pps input. The relays are SPDT, providing both normally-open and normally-closed contacts.
| Output | Front-Panel Indicators |
|---|---|
| Output frequencies 10 MHz sine, 5 MHz sine, 1 pps pulse (10 µs wide) |
Power "On" when AC power is applied |
| Amplitude 0.5 Vrms, ±10 % |
Locked "On" when frequency is locked to rubidium |
| 1 pps pulse amplitude 2.5 V into 50 Ω, 5 V into high-impedance loads |
1 pps input Blinks with each 1pps reference input applied to rear panel |
| Phase noise (SSB) <-130 dBc/Hz (10 Hz) <-140 dBc/Hz (100 Hz) <-150 dBc/Hz (1 kHz) <-155 dBc/Hz (10 kHz) |
1 pps sync "On" when 1pps output is synchronized within ±1 µs of 1pps input |
| Spurious <-100 dBc (100 kHz BW) |
Receive Blinks when RS-232 characters are received by FS725 |
| Harmonics <-40 dBc |
Send Blinks when RS-232 characters are sent by FS725 |
| Accuracy at shipment ±5 × 10⁻¹¹ |
Environmental |
| Aging (after 30 days) Monthly: <5 × 10⁻¹¹ Yearly: <5 × 10⁻¹⁰ 20 years (typ.): 5 × 10⁻⁹ |
Operating temperature +10 °C to +40 °C |
| Short term stability (Allan variance) <2 × 10⁻¹¹ (1 s) <1 × 10⁻¹¹ (10 s) <2 × 10⁻¹² (100 s) |
Temperature stability Δf/f < ±1 × 10⁻¹⁰ (+10 °C to +40 °C) |
| Holdover 72 hour Stratum 1 level (1 × 10⁻¹¹) |
Storage temperature -55 °C to +85 °C |
| Frequency retrace ±5 × 10⁻¹¹ (72 hrs. off, then 72 hrs. on) |
Magnetic field Δf/f < 2 × 10⁻¹⁰ for 1 Gauss field reversal |
| Settability <5 × 10⁻¹² |
Relative humidity 95 % (non-condensing) |
| Trim range ±2 × 10⁻⁹ (0 to 5 VDC) ±0.5 ppm (via RS-232) |
General |
| Warm-up time <6 minutes (time to lock) <7 minutes (time to 1 × 10⁻⁹) |
AC power 90 to 132 VAC or 175 to 264 VAC, 47 to 63 Hz, 50 W |
| Dimensions 8.5" × 3.5" × 13" (WHL) |
|
| Weight 9 lbs. |
|
| Warranty One year parts and labor on defects in materials and workmanship |
Company Details
Business Type:
Distributor/Wholesaler
Year Established:
2003
Total Annual:
500000-1000000
Employee Number:
>100
Ecer Certification：
Verified Supplier
Meigaolan is a test and measurement solutions and production suppliers, founded in 2003 and located in Shenzhen,China. Our highly skilled Sale Representatives can assist you with all of your new and refurbished test equipment needs, providing EMC test solutions and building your Anechoic ... Meigaolan is a test and measurement solutions and production suppliers, founded in 2003 and located in Shenzhen,China. Our highly skilled Sale Representatives can assist you with all of your new and refurbished test equipment needs, providing EMC test solutions and building your Anechoic ...
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