The frequency counter was tested from 1 MHz to over 500 MHz to see at what signal level it gave an accurate and stable reading. This was done by increasing the signal level at a know freq until the counter display was correct. Amplitude adjustment was down in 1dBm steps No measurements of maximum input power were made because of the risk of damage. The sensitivity rolls off below 10MHz.and above 500MHz. The counter stopped functioning at 580 MHz. The frequency was calibrated using a known 10MHz source. A large adjustment of the tuning capacitor was required. Testing was done with a 9V battery as the power source.

The frequency counter was tested from 1 MHz to over 500 MHz to see at what signal level it gave an accurate and stable reading. This was done by increasing the signal level at a know freq until the counter display was correct. Amplitude adjustment was down in 1dBm steps No measurements of maximum input power were made because of the risk of damage. The sensitivity rolls off below 10MHz.and above 500MHz. The counter stopped functioning at 580 MHz. The frequency was calibrated using a known 10MHz source. A large adjustment of the tuning capacitor was required. Testing was done with a 9V battery as the power source.

The frequency counter was tested from 1 MHz to over 500 MHz to see at what signal level it gave an accurate and stable reading. This was done by increasing the signal level at a know freq until the counter display was correct. Amplitude adjustment was down in 1dBm steps No measurements of maximum input power were made because of the risk of damage. The sensitivity rolls off below 10MHz.and above 500MHz. The counter stopped functioning at 580 MHz. The frequency was calibrated using a known 10MHz source. A large adjustment of the tuning capacitor was required. Testing was done with a 9V battery as the power source.

機能が表示されます。 クリアで明るい表示 SMAコネクタ。 オン/オフスライダースイッチがあります。

Appears to function. Clear, bright display. SMA connector. Has on/off slider switch.

機能が表示されます。 クリアで明るい表示 SMAコネクタ。 オン/オフスライダースイッチがあります。

Another Great and high Quality product from BanGGood. I give it 10 stars !!! Works fine....did some tests with Tx on HF-VHF..see pictures. Recommended !!!

Another Great and high Quality product from BanGGood. I give it 10 stars !!! Works fine....did some tests with Tx on HF-VHF..see pictures. Recommended !!!

Another Great and high Quality product from BanGGood. I give it 10 stars !!! Works fine....did some tests with Tx on HF-VHF..see pictures. Recommended !!!

I tested the device with my dual band FM xcvr and found the accuracy was off a few megacycles at both 2m and 70cm. Looking at the back there is a trim cap that adjusts the reference frequency for the meter. (I included a pic showing it.) I was able to tune the meter "dead nuts". (Engineering term for extremely accurate.) Can't wait to mount it in a box for a professional looking piece of test gear.

I tested the device with my dual band FM xcvr and found the accuracy was off a few megacycles at both 2m and 70cm. Looking at the back there is a trim cap that adjusts the reference frequency for the meter. (I included a pic showing it.) I was able to tune the meter "dead nuts". (Engineering term for extremely accurate.) Can't wait to mount it in a box for a professional looking piece of test gear.

I tested the device with my dual band FM xcvr and found the accuracy was off a few megacycles at both 2m and 70cm. Looking at the back there is a trim cap that adjusts the reference frequency for the meter. (I included a pic showing it.) I was able to tune the meter "dead nuts". (Engineering term for extremely accurate.) Can't wait to mount it in a box for a professional looking piece of test gear.

了解

ok

了解

A very useful instrument to have in the workplace for anybody interested in RF projects. Quite accurate. However, do hold the frequency source to measure close to the meter. The meter must be fitted with any SMA antenna or a breadboard hookup wire which can also serve as an antenna.

A very useful instrument to have in the workplace for anybody interested in RF projects. Quite accurate. However, do hold the frequency source to measure close to the meter. The meter must be fitted with any SMA antenna or a breadboard hookup wire which can also serve as an antenna.

A very useful instrument to have in the workplace for anybody interested in RF projects. Quite accurate. However, do hold the frequency source to measure close to the meter. The meter must be fitted with any SMA antenna or a breadboard hookup wire which can also serve as an antenna.

Nice Equipment. Easy to integrate within small inclosure. Precision is OK for hobby (see picture with gene at 100MHZ

Nice Equipment. Easy to integrate within small inclosure. Precision is OK for hobby (see picture with gene at 100MHZ

Nice Equipment. Easy to integrate within small inclosure. Precision is OK for hobby (see picture with gene at 100MHZ

良い価値と優れた品質。 ハイインピーダンス入力があることに注意してください。 RF に使用する場合は、入力コネクタ間に 51 Ω (SMD) 抵抗を追加する必要があります。

Good value and excellent quality. Be aware it has a high impedance input. May need a 51 ohm (SMD) resistor added across the input connector if used for RF.

良い価値と優れた品質。 ハイインピーダンス入力があることに注意してください。 RF に使用する場合は、入力コネクタ間に 51 Ω (SMD) 抵抗を追加する必要があります。

Nice little frequency meter, very useful, (this is the second I buy) but for exact calibration you need to replace the trimmer capacitor with another of less capacity (about 15 - 20 pF is ok). The original trimmer is 60 pF, too high.The replacement is very easy, no problem at all.

Nice little frequency meter, very useful, (this is the second I buy) but for exact calibration you need to replace the trimmer capacitor with another of less capacity (about 15 - 20 pF is ok). The original trimmer is 60 pF, too high.The replacement is very easy, no problem at all.

Nice little frequency meter, very useful, (this is the second I buy) but for exact calibration you need to replace the trimmer capacitor with another of less capacity (about 15 - 20 pF is ok). The original trimmer is 60 pF, too high.The replacement is very easy, no problem at all.

on the back of the counter here are some jumper pads if you close j1 and j2 you Will get a 10.7mhz offset. I have nog found a purpose for j1.

on the back of the counter here are some jumper pads if you close j1 and j2 you Will get a 10.7mhz offset. I have nog found a purpose for j1.

on the back of the counter here are some jumper pads if you close j1 and j2 you Will get a 10.7mhz offset. I have nog found a purpose for j1.