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


$ 683.10


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


  • 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
  • BNC or SMA I/O Connectors
  • Manual Switches and Remote Control Pins
  • +8.5 VDC adapter included


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-BNC and PRL-852A-RM-SMA have, respectively, BNC and 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 andPRL-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.


PRL-852A Block Diagram


Symbol Parameter Min Typ Max Unit Comment
tr/tf1 Rise/Fall Times (10%-90%)   130 155 ps SMA
tr/tf2 Rise/Fall Times (10%-90%)   150 200 ps BNC
BW1 Equivalent 3 dB Bandwidth 2.25 2.69   GHz SMA
BW2 Equivalent 3 dB Bandwidth 1.75 2.30   GHz BNC
RIN(RM) Input Resistance, Logic Inputs   4.99 Pulled up to +5 V
VIH Logic Input Hi Level 2 2 5 V  
VIL Logic Input Lo Level -0.50 0 0.50 V  
VSWR1 25 MHz ≤ f ≤ 1.25 GHz   1.15:1 1.25:1   SMA
VSWR2 25 MHz ≤ f ≤ 1.25 GHz   1.60:1 1.80:1   BNC
VSWR3 1.25 GHz ≤ f ≤ 2.4 GHz   2.70:1 3.50:1   SMA
VSWR4 1.25 GHz ≤ f ≤ 2.4 GHz   4.20:1 4.80:1   BNC
VO/VIN1 Insertion Loss, Selected Channel, 625 MHz ≤ f ≤ 1.25 GHz   2.0 2.6  dB  
VO/VIN2 Insertion Loss, Selected Channel, 1.25 GHz ≤ f ≤ 2.4 GHz   3.4 4.2  dB  
VO/VIN3 Insertion Loss, Selected Channel, 2.4 GHz ≤ f ≤ 3.0 GHz   5.0  dB  
VO/VIN4 Isolation, Non-selected Channels, 625 MHz ≤ f ≤ 1.25 GHz 34 42   dB  
VO/VIN5 Isolation, Non-selected Channels, 1.25 GHz ≤ f  ≤ 2.4 GHz 32 40   dB  
VO/VIN6 Isolation, Non-selected Channels, 2.4 GHz ≤ f  ≤ 3.0 GHz 33   dB  
TPLH Propagation Delay to Output   600 1000 ps  
TSKEW Skew between any 2 outputs   10 25 ps  
VIN Max Maximum Input Voltage     30 V  
IMAX Maximum Switching Current     0.5 A  
  Switch Time   6   ms  
  Expected Life cycles   > 106      
VDC DC Input Voltage 7.5 8.5 12 V  
IDC DC Input Current   85 110 mA  
VAC AC/DC Adapter Input Voltage 100 115 127 V  
  Logic Input for Remote Operation 2 x 2 pins (A0, A1, G1, G2)  
Size 1.3 x 2.9 x 1.5 in  
  Weight, excluding AC adapter 7 Oz  
  Shipping weight, including AC adapter 4 lb.