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Your cart is empty. Specification:
Item Type: Frequency Standard Reference Module
Current Consumption: Preheating stage Warm Up Time: About 5 minutes
Calibration Accuracy: ±0.01Hz
Frequency Stability: 5e-12
Output Level:
DBm: 10dBm±2dBm at 50Ω;
VRMS: 0.7071V at 50Ω;
VPeak: 1.0V at 50Ω;
P: 2.0V at 50Ω
Output Impedance: 50Ω
Interface Type: SMA Female
Product Use: Constant temperature 10MHz, ultra low phase noise, frequency reference module, frequency reference source, OCXO frequency reference source, used for instrument benchmarks such as audio systems, decoders, shortwave radios, frequency meters, sources, etc.
Package List:
1 x Module1 x Cable
BK
Reviewed in the United States on January 18, 2025
Frequency adjust does nothing. Turned it from stop to stop and output frequency never changed. Was going to calibrate it to a frequency standard but its impossible. Will be returning it.
No one of any importance
Reviewed in the United States on August 9, 2024
This unit uses a very costly OCXO that I bet is a pull from some old GPS timing standard.The problem with this unit seems to be the tuning range provided by R5 (Frequency Calibration).The range is not enough to bring this unit into calibration, but there is an easy fix for this with a small downside.First remove R1 and then replace R5 (Trim pot) with a 500k version of it. I used a 67WR500KLF 20 turn 500k pot can be found at digikey or mouser.I also rotated the part 180 degrees as to make clockwise rotation increase the frequency.The down side to using a 500k vs 200k is that the tuning adjustment will be more touchy. However, this is a 20 turn pot vs the 10 turn they used, so it should work out the same.The output of the oscillator is +6dbm as I have 12 DB of attenuation on the output.Scope shows a nice sinewave terminated with 50 ohms.The power draw was about 800mA at startup and under 200mA after warmup at 9 volts input.The board also needs to have the flux removed from the hand soldered partsFor the money, this is a great deal, and with R1 and R5 changed it will work within +/-0.01 Hz as they claim.GPS-disciplined rubidium and OCXO timing standards are used and all instruments are calibrated off of these standards.
Bernd P. Geh
Reviewed in the United States on March 9, 2024
I bought 3 units. One did not work at all, and the other two were just a little shy of 10MHz, before the potentiometer range ran out.My reference was a GPS PPS (the PPS has a pulse-pulse jitter of +/- 30 ns, but long term it follows the Caesium standard). I traced the circuit (see picture) and realized that R1, R2 and R3 - together with the 200k potentiometer - determine the Voltage for the Vref input to the OCXO. I removed R1 and added a 20k resistor parallel to R3. In this configuration, it is possible to calibrate the Oscillator +/- 3 Hz around 10 MHz.Wrapping all in thermal insulation, it is possible to have both units to run within 0.5 ppb of each other for many minutes. After modification, I am quite happy with it.One of the boards I had since a week and (after modification and calibration) I compared it against the GPS on a daily basis and it stayed stable so far.
Customer
Reviewed in the United States on February 9, 2024
I used the sine wave output to clock a salvaged and repaired HP8595E spectrum analyzer that had the ovenized option. Unfortunately the OCXO had been pilfered. I don't care for the power plug. In this application the terminal block would have been better. Another review correctly notes the very, very small range it can be adjusted over. It is extremely stable though. For less than 20 dollars, I suspect the value is unbeatable.
James
Reviewed in the United States on June 14, 2023
It is what it says it is - a 10MHz clock source. There's both sine & square wave outputs.It draws about 800mA until the oven stabilizes, then seems to hold low double-digit mA while in use.The square wave isn't the best, but it's usable.Accuracy doesn't seem to be all that great. I was seeing roughly 0.3ppm deviation, and that was after everything warmed up. So it's fairly accurate, but it's not precise. But anybody who might need something like this knows you don't get rock-solid precision like that for 20 bucks.As others have noted, the solder work isn't the best, but I only really saw problems with the hand-soldered components, and there was still flux and fingerprints on it from the manufacturing process.A couple minutes under a microscope to touch up the "not so good" joints, another few minutes to clean all the mess up, and you're all clear to enjoy your 9.999997MHz clock.
Justin C. McInvale
Reviewed in the United States on December 23, 2023
Gave four stars only because on mine the frequency was barely adjustable. The frequency control adjusted it by maybe 2Hz which put it at 10.000018MHz-10.000016MHz.The cure I found was to short R3 and turn the variable resistor until it reads 0 ohms to ground.That got it to 10.0000002MHz which for a lower end frequency counter that was originally used with CB radio, that's good enough.
Kevin
Reviewed in Canada on November 14, 2023
The device arrived un-calibrated, which was to be expected for the price point - however the multi-turn trimmer potentiometer 'R5' reaches its maximum physical adjustment point before it can be brought into calibration when attempting to align this device against a Rubidium/GPS disciplined oscillator. Phase noise is acceptable otherwise. Typically the adjustment range should allow generous offset on both sides to accommodate module tolerances and aging.
Michael W. Rippey
Reviewed in the United States on October 3, 2023
The square output is atrocious. The calibration was not set, and was not possible to get down to an actual perfect 10. It does seem stable, its does technically output about a 10mhz waveform.The solder will require corrections. My OCXO canister was not even installed level, its a crooked, floating can. You can tell no care was given for assembly.You can fiddle with it and tweak it to make it more usable.
Celine
Reviewed in the United States on November 15, 2022
Unit is very compact and worked right out of the box. But there is a 10 turn pot on the board but I do not know what it is for or how to adjust the frequency.
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