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.

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

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

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