1 x 4 RF Switch/Scanner, Manual/Remote Control


$ 776.25


  • Switching GHz/Sub-Nanosecond Rise-Time Signals
  • GHz Signal Routing and Scanning


  • DC to 2.5 GHz Usable Frequency Range
  • Up to 1.75 GHz 3 dB bandwidth
  • Z0 =50 Ω
  • Typical 1.65 dB Insertion loss and 46 dB Isolation @ 1.25 GHz
  • 6 ms Switching Time
  • BNC or SMA I/O Connectors
  • Manual or Remote Control
  • Modules include AC/DC Adapters
  • The PRL-854-RM replaces the PRL-854 in all applications, as the newer model now provides both manual and remote control in one unit.


    The PRL-854-RM is a 1 x 4, DC-coupled signal router designed for 50 Ω I/O applications. The usable frequency band extends from DC to over 2.5 GHz. A signal connected to input D can be routed to output Q1, Q2, Q3 or Q4. It can also be used as a Reflective Scanner in the reverse direction, in that signals connected to the Q inputs can be scanned one at a time at the D output. Because signals connected to the non-selected ports are not terminated, these signals will be reflected, hence the term reflective scanner.

    The PRL-854-RM-BNC has BNC I/O connectors, and the PRL-854-RM-SMA has SMA I/O connectors.

    Each unit also has 4 x 2 stick pins (pulled up to +5 V via 4.99 kΩ resistors) for remote TTL/CMOS logic control inputs. The pin designations and truth tables for the logic inputs are shown in the following table. When the rotary switch is set to the fully clockwise position the logic inputs are left open, A0 and A1 are high, and channel Q4 is selected. Jumpers or remote inputs may be used to pull the pins low to select other channels.

    A second set of control pins is commoned to the first set, permitting a daisy-chained control cable to program multiple units simultaneously. Because the control pins are pulled up to +5 V, the controller does not need to supply any current to control the unit. It needs only to sink 1 mA per pin.

    A0 A1 D
    L L Q1
    H L Q2
    L H Q3
    H H Q4

    Table I: Logic Input Truth table

    • 0 V ≤ L ≤ 0.4 V
    • 2 V ≤ H ≤ 5 V

    The PRL-854 series can be controlled from the PRL-USBIO-1 module (LabVIEW primitives available), the PRL-ETHIO-1 module, or any external controller that can pull the control pins down.

    The PRL-854-RM is housed in a 1.3-in. x 2.9-in. x 2.9-in. aluminum extrusion and is provided with a ±8.5 V AC/DC adaptor. If mounting is desired, a pair of 35001420 mounting brackets can accommodate two PRL modules of the same length. A number of PRL modules can also share a single ±8.5 V AC/DC adapter using the PRL-730 voltage distribution module. Please see the Accessories Section for more detail.

    Fig. 1, PRL-854 Block Diagram

    The PRL-8216 series is well suited to cascading, in either direction, for creating configurations with larger channel counts and/or special applications, with no engineering required. Please see this Application Note where our sister company designed a set of the similar PRL-854 and PRL-854DC units into a low-noise, high-speed, flexible test multiplexer:

    SPECIFICATIONS (0° C ≤ TA ≤ 35° C)*

    Symbol Parameter Min Typ Max Unit Comment
    tr/tf1 Rise/Fall Times (10%-90%)   200 230 ps SMA
    tr/tf2 Rise/Fall Times (10%-90%)   220 250 ps BNC
    BW1 Equivalent 3 dB Bandwidth 1.50 1.75   GHz SMA
    BW2 Equivalent 3 dB Bandwidth 1.40 1.59   GHz BNC
    RIN(RM) Input Resistance, Logic Inputs   4.99K    Ω 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   1.35:1 1.60:1   SMA
    VSWR2 25 MHz ≤ f  ≤ 1.25 GHz   2.30:1 2.80:1   BNC
    VSWR3 1.25 GHz ≤ f ≤ 2.4 GHz   2.00:1 2.50:1   SMA
    VSWR4 1.25 GHz ≤ f ≤ 2.4 GHz   3.60:1 4.50:1   BNC
    VO/VIN1 Insertion Loss, Selected Channel, 625 MHz ≤ f ≤ 1.25 GHz   1.65 2.50  dB  
    VO/VIN2 Insertion Loss, Selected Channel, 1.25 GHz ≤ f ≤ 2.4 GHz   6.00 10.00  dB  
    VO/VIN3 Isolation, Non-selected Channels, 625 MHz ≤ f ≤ 1.25 GHz 40 46   dB  
    VO/VIN4 Isolation, Non-selected Channels, 1.25 GHz ≤ f  ≤ 2.4 GHz 32 38   dB  
    TPLH Propagation Delay to Output   900 1200 ps  
    TSKEW Skew between any 2 outputs   10 40 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   120 135 mA  
    VAC AC/DC Adapter Input Voltage 100 115 127 V  
      Logic Input for Remote Operation 2 x 2 pins (A0, A1, G1, G2)   See Table 1
      Size 1.3 x 2.9 x 2.9 in  
      Weight, excluding AC adapter 7 Oz  
      Shipping weight, including AC adapter 4 lb.