Welcome to the store! 1. Single sideband is made with a frequency of 9MHz crystal, and the production form is Cohn type. Cohn type filters are also the agreed-upon circuit for single sideband circuits, offering a simple and practical effect. 2. Single sideband circuit production is a very critical part. Different manufacturers have significant variations in crystal parameters between batches. Simply producing the filter according to theoretical calculations is generally not very useful, which is also a major reason for the failure of many players to produce the circuit. 3. If you have a high-resolution scalar or vector network analyzer, production is generally easier under theoretical guidance, but it also requires many experiments and multiple parameter corrections. However, the effect of the one made with the instrument is still guaranteed. Parameters for this 9M condition z are as follows: a. Center frequency is approximately 8.998MHz; b. -6dB bandwidth is approximately 2.3kHz; c. Center frequency loss is approximately -4.73dB; d. Rejection ratio is close to 100dBc: e. The filter uses an LC impedance matching circuit to make the impedance at both ends 50 ohms. Without the LC circuit, the impedance at both ends is approximately 120 ohms. Color: Green Material: ABS Package Contents: 1 x Single Sideband Filter Only the above package contents are included, other products are not. Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the real thing. The allowed measurement error is +/- 1-3 cm. Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!