PTM-84A-20B MERRIMAC | Alldatasheet
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Fo r f u rther infor m at ion contact MERRIMAC / 41 Fairfield Pl., West Caldwell, NJ, 07006 / 973-575-1300 / FAX 973 575-0531 PRINCIPAL SPECIFICATIONS Calibration SMA BNC Frequency, Usable Model Model fc, MHz Bandwidth Number Number 20 to 100 fc ± 40% PTM-84A-B PTB-84A-B For complete model number replace ** with desired calibration frequency, f c in MHz. GENERAL SPECIFICATIONS Phase Shift Range: 0° to 360° nom. @ f c Least Significant Bit: 1.4° Most Significant Bit : 180° Accuracy at, f c : 1/2 of LSB typ. guaranteed monotonic Impedance: 50 Ω nom. VSWR: 1.3:1 max. Insertion Loss, I L : 2.5 dB nom., 4 dB max. IL , Variation vs. Cont: ±0.2 dB @ mid band Max. Input Power: +10 dBm Control Input: 8 Bit TTL @ 2 loads max. per Bit Logic Sense: Positive Supply Power: +5 VDC@250 mA max. Settling Time: 4 µs max. Weight, nominal: 10 oz (285 g) Operating Temp: -- 55° to +85°C General Notes: 1. PTB- & PTM-84A series phase shifters provide up to 360° of phase shift at a selected calibration frequency in 8 binary increments (255 steps) resulting in 1.4° resolution. Each step is generated with different cable lengths switched with PIN diodes. 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). 2. Phase shifters based on cable switching are inherently stable and well matched. Phase shift can be set and held very closely in binary increments from the LSB to the MSB (Most Significant Bit). 3. This series can be calibrated up to 100 MHz and used to 180 MHz while the related PTM-84B series extends coverage to 500 MHz. PTB & PTM-84A Series 8-BIT DIGITAL PHASE SHIFTER 20 to 100 MHz / 1.4 Phase Resol. / Monotonic / Broadband, Switched Cable Design / BNC or SMA Functional Schematic Diagram 24May96
NOTES: 1. Tolerance on 3 place decimals ± .020(.51) except as noted. 2. Dimensions in inches over mm. Package Outline Fo r f u rther infor m at ion contact MERRIMAC / 41 Fairfield Pl., West Caldwell, NJ, 07006 / 973-575-1300 / FAX 973-575-0531 PTB & PTM-84A Series 8-BIT DIGITAL PHASE SHIFTER 20 to 100 MHz / 1.4 Phase Resol. / Monotonic / Broadband, Switched Cable Design / BNC or SMA Bit Phase Increment LSB 1 1.40° 2 2.81° 3 5.62° 4 11.25° 5 22.5° 6 45.0° 7 90.0° MSB 8 180.0° 26Apr96