2 Ch., 2 GHz A/B Switch, Remotely controllable

Applications:

• Switching GHz/Sub-Nanosecond Rise-Time Signals
• 2 x 1 Microwave Scanner

Features:

• DC to 3 GHz Usable Frequency Range
• Up to 2.69 GHz 3 dB Bandwidth
• 50 Ω Impedance
• 1.6:1 VSWR
• 6 ms Switching Time
• SMA I/O Connectors
• Manual Switches and Remote Control Pins
• +8.5 VDC adapter included

Description

The PRL-852A-RM is a dual channel, DC coupled 'A/B' switch designed for switching microwave and sub-nanosecond rise time signals in the 50 Ω environment. It is a reflective switch in that the unselected port, A or B, is not terminated into 50 Ω. Therefore, a signal connected to the unselected port will be reflected. The reflective switch is intended mainly for routing a signal from port C to either port A or B, where not terminating the unselected port into 50 Ω is desirable. It can also be used as a scanner when not terminating the unselected port is acceptable.

The PRL-852A-RM-SMA has SMA I/O connectors. Each channel has a toggle switch and TTL/CMOS-compatible control pins for output selection.

When a switch is in the Up position, the upper pin is pulled up to 5 V via a 4.99KΩ resistor, and the Port A is selected. A logic Hi of +3.5 V minimum applied to the upper pin is sufficient to maintain the selection of Port A. The lower pin is GND. Shorting the upper pin to GND or pulling it below 0.5 V selects Port B.

The two channels 1 and 2 are independent, and may be switched separately. The toggle switch for a given channel should be in the Up position for remote control. Remote pins should be disconnected in manual mode, otherwise the switch in the Down position will short the external control circuit to GND.

The unit is housed in an extruded aluminum enclosure and supplied with a ±8.5V AC/DC adapter. It can also be powered by a +7.5 V to +12 V DC power supply.

Unless otherwise specified, dynamic measurements are made with all outputs terminated into 50 Ω.

The PRL-852A-RM replaces both the PRL-852 and PRL-852-RM in all applications, as it provides both manual and remote control in a single design. Please note that the new control pin polarity is reversed with respect to the old design, with the benefit that that remote circuit no longer needs to provide any current to the device.