Stocked Electro-Mechanical Switches

Transcription

1 DC-6.5 GHz SPT SEM Series y Stdard Features Include: Latching Models, Failsafe Models, TTL Logic Control, Indicator Circuits Specifications SPT, SMA (F), DC to 8 GHz MODEL FEATURES ACTUATING CURRENT & 5 C) FREQUENCY RANGE (GHz) INSERTION LOSS (db max.) (max.) ISOLATION (db min.) SEM00 SEM00- SEM00-4 FAILSAFE V 4V -8. SEM00L PULSE LATCHING SEM3 FAILSAFE / INDICATOR CKT -8. SEM3D FAILSAFE / INDICATOR CKT / TTL* / SUPPRESSION DIODE -8. SEM3L PULSE LATCHING / INDICATOR CKT SEM3T FAILSAFE / INDICATOR CKT / TERMINATED -8. SEM3LT PULSE LATCHING / TERMINATED / INDICATOR CKT nardaeast@l-3com.com TEL:

2 Introduction SPT, SMA (F), DC to 8 GHz (con t) MODEL SEM3LD SEM3DT SEM3LDT SEM3LDT-4 FEATURES PULSE LATCHING / INDICATOR CKT / TTL* FAILSAFE / TERMINATED / INDICATOR CKT / SUPPRESSION DIODE / TTL* PULSE LATCHING / INDICATOR CKT / TERMINATED / TTL* / SELF DE-ENERGIZING ACTUATING CURRENT & 5 C) 00 4V FREQUENCY RANGE (GHz) INSERTION LOSS (db max.) (max.)... ISOLATION (db min.) SPT, Type N (F), DC to GHz MODEL FEATURES ACTUATING CURRENT & 5 C) SEM3N FAILSAFE / INDICATOR CKT SEM3DN FAILSAFE / INDICATOR CKT / TTL* / SUPPRESSION DIODE FREQUENCY RANGE (GHz) INSERTION LOSS (db max.) 5 5 (max.) ISOLATION (db min.) SPT, SMA (F), DC to 6.5 GHz MODEL FEATURES ACTUATING CURRENT & 5 C) SEM4 FAILSAFE / INDICATOR CKT FREQUENCY RANGE (GHz) INSERTION LOSS (db max.) 0.7 (max.)..7 ISOLATION (db min.) 50 * APPLIES TO ALL SWITCHES WITH TTL:. Selected position of the switch is controlled by TTL Logic. Switch requires only nominal +8 Vdc for coils (additional 5 Vdc is not required) 3. TTL LOGIC LEVEL: Low 0 to.8 Vdcx High.5 to 5.0 Vdc 4. TTL LOGIC INPUT CURRENT: Low 0 ma High.6 ma 3.85 Vdc nardaeast@l-3com.com TEL:

3 Outline Drawings d Schematics Dimensions in inches, unless otherwise specified. SEM00, SEM00-, SEM IN SCHEMATIC SHOWN WITH POSITION CLOSED SEM00L nardaeast@l-3com.com TEL:

4 Introduction SEM3 SEM3D +V IND CIRCUITRY NAMEPLATE DIA. PL THRU.093 IN.5 MAX DIA. PL THRU.50 CONNECTOR, SMA (FEMALE) PER MIL-C PL IN SCHEMATIC SHOWN WITH POSITION CLOSED.8.90 SEM3L nardaeast@l-3com.com TEL:

5 Outline Drawings d Schematics Dimensions in inches, unless otherwise specified. SCHEMATIC SHOWN WITH POSITION CLOSED SEM3T + IND CIRCUITRY IN SCHEMATIC SHOWN WITH POSITION CLOSED SCHEMATIC SHOWN WITH POSITION CLOSED SEM3LT RTN SCHEMATIC SHOWN WITH POSITION CLOSED SEM3LD nardaeast@l-3com.com TEL:

6 Introduction IND CIRCUITRY LOGIC +V RTN LOGIC INPUT IN SEM3DT SCHEMATIC SHOWN WITH POSITION CLOSED SEM3LDT d SEM3LDT INDICATOR CIRCUITRY IN SEM3N nardaeast@l-3com.com TEL:

7 Outline Drawings d Schematics Dimensions in inches, unless otherwise specified. LOGIC +8VDC RTN INDICATOR CIRCUITRY IN SEM3DN SEM4 nardaeast@l-3com.com TEL:

8 Glossary All switches are bi-directional. Inputs d Outputs are interchgeable. SPT A single pole, double throw switch has one input port d two selectable output ports. Multiposition Switch A multiposition switch has one input port d more th two selectable output ports. Unlike some switches, Narda models c be switched directly to y one of the available output positions without sequencing through intervening positions. Trsfer Switch A trsfer switch has two independent paths that operate simulteously in one of two selected positions. Failsafe The switch moves to the closed position when the actuating voltage is applied d always returns to a predetermined position when the voltage is removed. Latching Also called Pulse Latching, the switch remains in a preselected position whenever the actuating voltage is removed or interrupted d holds that preselected position until a voltage is applied to other position. This configuration must be pulse controlled with a pulse width of 0 ms to 00 ms duration. Stdard polarity is common positive. Normally Open All output ports of the switch are disconnected from the input port until a voltage is applied to a selected position. Terminated Units Each unused or open output RF port is internally terminated in a 50-ohm resistive load (W CW max.). TTL Selected position of the switch is controlled by a TTL Logic High. The switch requires only nominal +8 Vdc (additional 5 Vdc is not required). TTL Logic Voltage Level: Low 0 to 0.8 Vdc High.5 to 5.0 Vdc TTL Logic Input Current: Low 0 ma High.6 ma 3.85 Vdc TTL Units Trsistor-Trsistor-Logic circuitry enables the status of the switch to be controlled by the level of TTL logic input. Suppression Diodes Fast recovery silicon rectifiers (diodes) connected in parallel with the coils of the switch to suppress y trsient voltage that may be generated by the coils. Indicator Circuitry A set of internally mounted contacts that allows external monitoring of switch RF status. Some switch series include a steering diode drive due to the electronic indicator. Solder Terminal A turret terminal is stdard on all switches. Self De-energizing Circuitry With this option, a set of internally mounted contacts or electronically generated pulses disconnects the driver voltage as soon as RF contact has been made. This option is only available with latching type switches. Suppression diodes must be specified with this option. Common Specifications RF Impedce ohms nominal Actuating Voltage... 8 Vdc ± V Switching Time...5 ms (max.) Switching Sequence... Break Before Make Operating Ambient Temp C to + C Operating Life... million cycles/position Designed to meet MIL-S nardaeast@l-3com.com TEL:

9 Introduction Power Hdling Capability Power Hdling Capability of Narda Switches vs. Frequency for Common RF Connectors (for 5 C ambient temperature, matched 50ohm systems, sea level d cold switching) For above., Derate Power Hdling Capability as shown: Derating Factor nardaeast@l-3com.com TEL: