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DescriptionThe PRL-172 is a ready-to-use TTL crystal clock source module with 50 Ω back terminated outputs, designed for driving long lines with or without 50 Ω terminations. The PRL-172 converts the internal crystal clock frequency f into 4-Φ clock outputs of f, f/2, f/4, and f/8. The maximum frequency output of the PRL-172 is 50 MHz, model number PRL-172-50. Standard crystal frequencies provided are 1 MHz, 2.5 MHz, 5 MHz, 10 MHz, 25 MHz, and 50 MHz. Other crystal frequencies are also available by special order, with a 3-digit suffix indicating the requested frequency of the un-divided "f" output. Each clock source module is housed in a 1.3 x 2.9 x 2.9-in. extruded aluminum enclosure and is supplied with a ±8.5V AC/DC Adapter. 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 ±8.5V AC/DC adapter using the PRL-730 voltage distribution module. Please see the Accessories Section for more detail. |
PRL-172 Block Diagram
(0° C ≤ TA ≤ 35° C)
Symbol | Parameter | Min | Typ | Max | Unit | Comments |
---|---|---|---|---|---|---|
IDC | DC Input Current | 260 | 300 | mA | PRL-172-50 | |
VDC | DC Input Voltage | 7.5 | 8.5 | 12 | V | |
VAC | AC/DC Adapter Input Voltage | 103 | 115 | 127 | V | |
tr/tf | Rise/Fall Times, (10%-90%) | 2 | 3 | ns | ||
tSKEW | Skew between any two channels | 750 | 1500 | ps | ||
fMAX | Max output frequency | 50 | MHz | Cable < 6' | ||
Δf | Frequency Stability | 100 | ppm | |||
Frequency Jitter | 50 | 200 | ps | |||
Positive Duty Cycle | 40 | % | Measured @ 50% | |||
Maximum cable length | 100 | ft | Output frequency ≤80 MHz | |||
Size | 1 x 2.9 x 2.9 | in. | ||||
Weight, excl. AC adapter | 5 | Oz | ||||
Shipping weight, incl. AC adapter | 4 | lb. |