Applications:
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Description: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.
Table I: Logic Input Truth table
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. |
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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. | ||||
