The **CCR-59S730-R** is a high-performance coaxial switch manufactured by Teledyne Relays. It is specifically a **SP3T (Single Pole Three Throw)** electromechanical relay designed for radio frequency (RF) and microwave applications. --- ### ## Technical Specifications Overview Below is a breakdown of the key electronic and physical characteristics: | Parameter | Specification | | :--- | :--- | | **Switch Type** | SP3T (Single Pole Three Throw) | | **Frequency Range** | DC to 26.5 GHz | | **Actuator Voltage** | 28 VDC | | **Actuator Type** | Latching with Self-Cutoff | | **Connector Type** | SMA (Female) | | **Impedance** | 50 Ohms | | **Features** | TTL Logic Control & Indicators | --- ### ## Detailed Component Breakdown #### 1. Actuation Mechanism: Latching with Self-Cutoff Unlike a "failsafe" relay that requires constant power to stay in a specific position, this **latching** model uses a pulse of current to flip the switch. Once it reaches the desired position, internal permanent magnets hold it there. * **Self-Cutoff:** It features an internal circuit that automatically cuts off the drive current once the switch has completed its cycle, preventing coil burnout and saving energy. #### 2. RF Performance (The "CCR" Series) The "CCR" designation refers to Teledyne's specialized design for low insertion loss and high isolation. * **Insertion Loss:** Typically remains very low (0.2 dB to 0.7 dB depending on frequency), ensuring signal integrity. * **Isolation:** Provides high separation between ports (often >50 dB at high frequencies) to prevent signal leakage/crosstalk. #### 3. Integrated Indicators The "7" in the part number indicates the presence of **Indicator Circuitry**. This allows external monitoring equipment to verify the physical position of the switch (Port 1, 2, or 3) via an auxiliary set of contacts. #### 4. TTL Logic Control The "S" in the part number denotes **TTL Compatibility**. Instead of applying the full 28V directly to the coils to trigger a switch, the user can interface with a standard 5V logic circuit (microcontrollers, FPGAs) to command the relay. --- ### ## Pinout and Schematic Logic The device typically utilizes a D-Sub connector or solder pins for control. The electronic logic follows this pattern: ```yaml Control_Interface: - Vcc: +28 VDC (Main Power) - Ground: Common Return - TTL_Input_1: Logic HIGH activates Port 1 - TTL_Input_2: Logic HIGH activates Port 2 - TTL_Input_3: Logic HIGH activates Port 3 - Indicators: Separate pins to confirm "Closed" status ``` ---