Randle C. Sink

Rated 3.00(2) — Randle C. Sink

Adding a second resistor Rb to the 555 timer and connecting the trigger input to the threshold input causes the timer to self-trigger and run as a multivibrator. The capacitor C will charge through Ra & Rb and discharge through Rb only. The duty cycle...

Rated 1.00(1) — Randle C. Sink

This app prompts the user for Amax in dB (the maximum p-p variation in the passband of the filter), Amin (the minimum response attenuation), Wc in rad/sec (the upper end of the passband) and Ws (the upper end of the stopband). This calculates Epsilon...

Rated 4.03(35) — Randle C. Sink

Knowing the gain (Gr in dB) of the receiving antenna, the distance from the satellite to the receiving antenna on earth (Km), the frequency that the satellite operates at (GHz), the radiated power of the satellite (in Watts) and the gain of the satellite.

Rated 3.90(10) — Randle C. Sink

For ECM, this app is to calculate the J/S ratio for the stand-off jammer (SOJ) situation. In this case, the jammer is at a different location than the target. While the target is in the main beam of the radar antenna, the jammer radiates power into the...

Rated 0.00(0) — Randle C. Sink

Note: this app is probably too large for phones but OK for tablets and PCs. For a tracking radar, enter the power in kW antenna gain in dB, and IF bandwidth in MHz. Then enter the aircraft cross sectional area in m^2 and the range in km, for a self-screen

Rated 0.00(0) — Randle C. Sink

This app prompts the user to enter the distance from the satellite to earth in km, the radiated power from the satellite in Watts and the gain in dB in the direction of the observer and the effective area of the receiving antenna. Once entered, push...

Rated 4.38(13) — Randle C. Sink

This app can be used to find the power density in the main beam of the antenna. The user is prompted to enter the gain of a tower-mounted antenna in dB, the transmitter power in Watts and the distance from the antenna in meters. As an example, enter...

Rated 0.00(0) — Randle C. Sink

For a standard NTSC satellite signal enter baseband video bandwidth (BBV BW) in MHz, the the RF bandwidth (RF BW) of the signal transmitted over the satellite link in MHz, the receiving earth station C/N ratio in dB, the de-emphasis value P and the subjec

Rated 5.00(2) — Randle C. Sink

This app will determine the S/N for FM voice when the user enters the baseband maximum frequency and the RF channel bandwidth in kHz, the de-emphasis in dB and the receiver C/N ratio in dB. Carson's rule is used to determine the peak frequency deviation.A

Rated 0.00(0) — Randle C. Sink

This app is used to determine the number of voice channels that each earth station TDMA can transmit as well as the transmission rate if the earth stations send data rather than digital speech. The data burst duration (Td) for each earth station is determ

Rated 4.00(1) — Randle C. Sink

User enters frequency in GHz, Er & Ur, pushes the "Calculate" button and this app calculates phase velocity, wavelength and impedance. As an example, enter 3 for GHz, 7 for Er and 3 for Ur, then push calculate. This should result in 6.547E7 m/sec for...

Rated 0.00(0) — Randle C. Sink

This app prompts the user the user for Amax (p-p maximum variation in the pass band) in dB, Amin (minimum response attenuation), Wc (upper edge of the pass band) in rad/sec and Ws (upper edge of stop band). After hitting the Calculate button, the values..

Rated 4.75(4) — Randle C. Sink

This app requires users to enter earth station antenna diameter (m), overall efficiency percentage, signal frequency (MHz) and system noise temperature (K). Hit "Calculate" and the app returns antenna gain in dB, Ts in dBK and the G/T ratio in dBK. For...

Rated 5.00(1) — Randle C. Sink

For Electronic Counter Measures (ECM), this app is used to determine the jammer-to-signal (J/S) ratio. For a tracking radar, enter the power in kW, antenna gain in dB, and IF bandwidth in MHz. Then enter the aircraft cross sectional area in m^2 and the...

Rated 0.00(0) — Randle C. Sink

To determine the noise figure (NF) of a device use the relationship NF= (S/N)in/(S/N)out. Then in order to find the noise temperature use Td = To*(NF - 1) where To is the reference temperature (usually 290 K). The noise figure NF is given in dB but this..

Rated 0.00(0) — Randle C. Sink

This app is used to determine the ripple factor (e) and the order (n) of the inverse Chebyshev response when the user enters the maximum passband attenuation (Wp) in rad/s, the cutoff frequency (Wc), the maximum passband attenuation in dB (Amax) and...

Rated 5.00(1) — Randle C. Sink

At microwave frequencies, use the app to determine the skin depths of aluminum (Al), copper (Cu), gold (Au) or silver (Ag) and others. Use the checkboxes next to the metal to select it, then enter the frequency (in GHz, that is 10E9), then push the "Calcu

Rated 0.00(0) — Randle C. Sink

This app is for finding maximum range for detecting a target using the Radar Range Equation for a pulsed radar when the user enters the operating frequency of the radar in GHz, the antenna gain in dB, the transmitter power in kW (pulse power), the target.

Rated 4.19(21) — Randle C. Sink

This is the noise model of a receiving antenna, where all of the noisy units have been replaced by one noiseless amplifier with a single noise source Ts as its input. Calculate the system noise temperature Ts after entering Tin (noise temperature of...