PTB & PTM-84B Series 8-BIT DIGITAL PHASE SHIFTER 100 to 500 MHz / 1.4 Phase Res. / Monotonic / Broadband, Switched Cable Design / BNC or SMA PRINCIPAL SPECIFICATIONS Calibration Frequency, fc, MHz Usable Bandwidth, MHz 100 to 500 fc ± 40% SMA Model Number GENERAL SPECIFICATIONS BNC Model Number PTM-84B-***B PTB-84B-***B For complete Model Number replace *** with desired Calibration Frequency, fc in MHz. Phase Shift: 0° to 360° nom.@ fc Bit Count: 8 Least Significant Bit: 1.4° Most Significant Bit: 180° Accuracy at fc: 1/2 of LSB typ. General Notes: Impedance: 50 Ω nom. 1. Digital phase shifters in the PTM-84B series are controlled directly by TTL and are available for frequencies from 100 to 500 MHz. 2. Each model provides 360° of phase shift at a selected calibration frequency in 8 binary increments (255 steps) resulting in 1.4° resolution. 3. Phase shift is based on propagation delay through precisely calibrated cables. Selecting a specific phase shift is accomplished by entering a digital word that in turn switches in appropriate delay lines through fast-acting PIN diodes. 4. Advantages of the switched-line phase shifter over the digitally controlled analog type include potential for higher accuracy and smaller value of the Least Significant Bit (LSB). 5. Phase shifters based on switched cables are inherently stable and well matched. Each bit can be set and held very closely in binary increments from the LSB to the MSB (Most Significant Bit). VSWR: 1.3:1 max. Insertion Loss, IL: 2.5 dB nom., 4 dB max. guaranteed monotonic IL Variation vs. Cont: ±0.2 dB @ mid band Input Power: +10 dBm max. Control Input: 8-Bit TTL @ 2 loads max. per Bit Logic Sense: Positive Supply Power: +5 VDC@500 mA max. +15 VDC@150 mA max. Settling Time: 1 µs max. Weight, nominal: 10 oz (285 g) Operating Temp: -- 55° to +85°C Functional Schematic Diagram 26Apr96 ForfurtherinformationcontactM ERRIM AC /41 Fairfield Pl.,W estCaldw ell,NJ,07006 / 973-575-1300 /FAX 973-575-0531 PTB & PTM-84B Series 8-BIT DIGITAL PHASE SHIFTER 100 to 500 MHz / 1.4 Phase Res. / Monotonic / Broadband, Switched Cable Design / BNC or SMA Package Outline LSB MSB Bit 1 2 3 4 5 6 7 8 Phase Increment 1.40° 2.81° 5.62° 11.25° 22.5° 45.0° 90.0° 180.0° NOTES: 1. Tolerance on 3 place decimals ± 0.020(.51) except as noted. 2. Dimensions in inches over mm. 26Apr96 ForfurtherinformationcontactM ERRIM AC /41 Fairfield Pl.,W estCaldw ell,NJ,07006 / 973-575-1300 /FAX 973-575-0531