User Guide Frequency Standard QFS-106 Model QFS-106 P/N 0150060XX Revision B August 2005 Brandywine Communications 2230 South Fairview Street Santa Ana, CA 92704 (714) 755 1050 (714) 755 0175 http://www.brandywinecomm.
FCC PART 15, CLASS A VERIFICATION INFORMATION TO THE USER FOR CLASS A DIGITAL DEVICE WARNING: This equipment has been tested and found to comply with the limits for Class A digital device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
Revision History REVISION NC A B DATE 10-26-04 12-14-04 08-03-05 COMMENTS Original release of QFS-106 user guide. Revision of the rear panel and mechanical outline drawings. Revision of Section 3.1.
Table of Contents 1 2 3 4 5 6 Overview ................................................................................................................................. 5 1.1 Part Number Reference ................................................................................................. 5 Specifications .......................................................................................................................... 6 2.1 I/O and Environmental (Rear Panel) ................................
1 Overview The Brandywine Communications QFS-106 is a high performance reference frequency standard distribution amplifier. The QFS-106 has two internal reference oscillator options. The QFS-106 may use either a free running Oven Controlled Crystal Oscillator (OCXO) or a free running Rubidium Oscillator. Also, the QFS-106 has various power supply options. The QFS-106 may use either AC or DC input power supplies. The QFS-106 provides six output channels of a single reference frequency, typically 10 MHz.
2 Specifications 2.
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3 Unpacking and Installation 3.1 Unpacking Carefully remove the QFS-106 from the shipping carton. The following items should be included in the shipment: • 1 QFS-106 • 1 user guide • 1 power cord • 1 power mating connector (DC voltage only) Note the power connection on the rear of the QFS-106 chassis. Please take note of the voltage displayed near this power connection. If the AC or DC voltage setting is incorrect, use a small screw driver to remove the fuse holder.
QFS-106 Power 1 2 3 4 QFS-106 5 6 REF IN REF OUT 1 2 3 4 5 6 User’s Equipment User’s Equipment QFS-106 REF IN REF OUT 1 2 3 4 5 6 User’s Equipment QFS-106 REF IN REF OUT 1 2 3 4 5 6 User’s Equipment Additional QFS-106 Units Figure 1 Daisy-Chain Interconnection When daisy-chaining multiple QFS-106 units, these units should be connected as shown in Figure 1.
4 Operation 4.1 Powering the QFS-106 Once all the connections to the QFS-106 have been made, apply power to the unit by switching the power switch to the on position. The power switch is located on the rear panel of the unit. The Power LED and Output Monitor LEDs (1 – 6) on the front panel of the unit will illuminate green. Please note that units fitted with the quartz oscillators will take approximately five minutes to warm up and these units will reach full accuracy after twenty-four hours.
5 Calibration The QFS-106 is a free running standard that requires periodic recalibration. The unit must be calibrated against a frequency standard that is at least ten times more accurate than the oscillator fitted in the QFS-106 unit. Therefore OCXO oscillator units must be calibrated against a rubidium reference. Rubidium oscillator units must be calibrated against a cesium frequency standard or GPS disciplined rubidium.
6 Diagrams FIGURE 1 2 3 4 5 DESCRIPTION QFS-106 Front Panel (AC and DC Models) QFS-106 Rear Panel (AC Model) QFS-106 Rear Panel (DC Model) QFS-106 Mechanical Outline (AC Model) QFS-106 Mechanical Outline (DC Model) 12 MANUAL P/N 900000034 REV B
