PTB & PTM-64A Series 6-Bit DIGITAL PHASE SHIFTER 10 to 250 MHz / Low RF Transients / Fast Switching Time / Monotonic Output / BNC or SMA PRINCIPAL SPECIFICATIONS GENERAL SPECIFICATIONS Calibration Frequency fc, MHz SMA Model Number BNC Model Number 10 - 250 PTM-64A-**B PTB-64A-**B For complete model number replace ** with desired calibration frequency, fc, in MHz Package Outline fc ± 2.5% 0° to 360° nom.@fc 5.6° 180° 1/2 of LSB typ. (guaranteed monotonic) Impedance: 50 Ω nom. VSWR: 1.35:1 max. Insertion Loss, IL: 3 dB nom. IL, Variation vs. Cont: ±0.5 dB @ fc Input Power: +10 dBm max. Control Input: 6 Bit TTL Logic Sense: Positive +5 VDC @ 350 mA nom. Supply Power: +15 VDC @ 100 mA nom. 100 ns typ., 250 ns max. Settling Time: Weight, nominal: 10 oz (285 g) Operating Temp: -- 55° to +85°C Usable Bandwidth: Phase Shift Range:: Least Significant Bit: Most Significant Bit: Accuracy @ fc: Phase Shift Increments Bit 1 (LSB) Phase 5.5° 2 3 4 5 6 MSB) 11.2° 22.5° 45.0° 90.0° 180° General Notes: NOTES: 1. Tolerance on 3 place decimals ± .020(.51) except as noted. 2. Dimensions in inches over millimeters. 1. PTM-64A series phase shifters are controlled directly from TTL logic circuits and are available for center frequencies from 10 to 250 MHz. 2. Their lumped element design is inherently narrow band since it utilizes a quadrature hybrid in each switch section. However, this approach provides much smoother phase transitions than a switched cable design since the switching does not take place in the RF signal path. This feature makes the PTM-64A series preferable for applications where minimizing switching transients is important. 3. Accuracy and temperature stability of each phase shift section allows for a resolution of 5.6°, but as total phase shift increases, overall accuracy deteriorates due to cumulative internal reflections. 24May96 ForfurtherinformationcontactM ERRIM AC /41 Fairfield Pl.,W estCaldw ell,NJ,07006 / 973-575-1300 /FAX 973-575-0531