SM0218LC1CDB

Modulators 317 to 355:Modulators 317 to 355 9/6/07 11:35 AM Page 31 2 TO 18 GHz SINGLE-SIDEBAND UPCONVERTER OR I/Q MODULATOR MODEL: SM0218LC1CD__ (Carrier Driven) * MODULATOR PRODUCTS FEATURES • RF output/carrier input .......... 2 to 18 GHz • Linear modulation input ........ Up to +5 dBm • Carrier input power ................ +10 to +16 dBm • Sideband suppression ........... 20 dB • Carrier rejection...................... 25 dB • IF options: Single sideband ...................... A, B and C (internal hybrid) I/Q modulator .......................... Q (separate inputs) All modulators and SSB upconverters require that at least one of the input frequency bands (carrier or modulation) has sufficient power to turn on the semiconductors. This model employs carrier drive. All modulators yield a frequency spectrum that utilizes both sidebands on either side of the output suppressed carrier. SSB upconverters, however, employ an internal IF 90° hybrid to yield only one RF sideband output. This is offset above or below the input LO by the IF frequency (test data is recorded for the upper sideband only). Schottky diode (standard) modulators have the greatest speed and bandwidths, but yield RF output powers of typically less than 0 dBm. Greater output power can be achieved by using higher level diodes with proportional increases in carrier power. This carrier driven unit is used when the modulation input to RF output must be linear (low harmonics). A typical application is for digital QPSK with cosine shaped pulses (for minimum bandwidth). Many SSB upconverters also require input-to-output signal linearity, thus requiring LO drive. ELECTRICAL SPECIFICATIONS INPUT PARAMETERS RF carrier RF VSWR (RF = +13 dBm, IF modulation = 0 dBm) RF power (low-level diodes) IF modulation frequency range (Note 3) IF modulation power range (total I/Q) TRANSFER CHARACTERISTICS Conversion loss (Note 1) Carrier suppression (RF = +13 dBm, IF modulation = +5 dBm) Sideband suppression (Note 2) Carrier – fundamental IF Carrier ±2 IF, 4 IF, etc. Carrier ±3 IF Quadrature phase accuracy, I/Q mode (see Graph Key) Quadrature amplitude accuracy OUTPUT PARAMETERS RF frequency range RF VSWR (RF = +13 dBm, IF modulation = 0 dBm) dBc dBc dBc Degrees dB UNITS GHz Ratio MIN. 2 2.5:1 15 18 45 40 ±10 ±1 TYP. MAX. 18 UNITS GHz Ratio dBm MHz dBm UNITS dB dBc +10 DC Noise MIN. TYP. 8 12 MIN. 2 2:1 +13 +16 500 +7 MAX. 12 TYP. MAX. 18 100 Davids Drive, Hauppauge, NY 11788 • TEL: (631) 439-9220 • FAX: (631) 436-7430 • www.miteq.com C-34B/347 Modulators 317 to 355:Modulators 317 to 355 9/6/07 11:35 AM Page 32 SM0218LC1CDQ CARRIER DRIVEN TYPICAL TEST DATA RF Phase (Deg.) I/Q Graph Key 0 +90 +/+ -/+ -90 +/+180 -/- I/Q MODE (RF = +13 dBm, I/Q = 0 dBm each input (0.316 volts peak across 50 ohm load) STATIC AMPLITUDE BALANCE STATIC PHASE BALANCE MODULATOR PRODUCTS AMPLITUDE BALANCE (dB) +4 +2 REF -2 -4 2 10 18 +40 PHASE BALANCE (DEG.) +20 REF -20 -40 2 10 18 FREQUENCY (GHz) FREQUENCY (GHz) SM0218LC1CDC CARRIER DRIVEN OUTPUT SPECTRUM TABLE SSB UPCONVERTER (RF = +13 dBm, IF = +3 dBm total, IF = 100 MHz) Frequency (GHz) 2 4 6 8 10 12 14 16 18 fo + IF (I.L., dB) Note 1 9 11 9 8 8 7 8 10 10 fo - IF (dBc) 28 31 32 35 21 25 24 22 21 fo (dBc) 9 17 18 37 30 22 16 12 20 fo - 2 IF (dBc) 35 52 46 48 49 46 47 40 38 fo + 2 IF (dBc) 36 53 51 48 47 45 42 40 39 fo - 3 IF (dBc) 32 41 53 48 48 43 38 34 33 fo + 3 IF (dBc) 50 41 43 44 41 42 38 37 37 MAXIMUM RATINGS Specification temperature.................... +25°C Operating temperature ........................ -54 to +85°C Storage temperature .......................... -65 to +125°C GENERAL NOTES 1. Insertion loss relative to +3 dBm IF input. All other outputs, including fo, are relative to the desired upper (fo + fm) output. 2. Standard SSB units with IF hybrids are aligned for upper sideband operation. For lower sideband or selectable sideband, contact MITEQ. *3. Available part numbers: SM0218LC1CD__ * A = 20–40 MHz B = 40–80 MHz C = 100–200 MHz Q = DC–500 MHz NOTE: Test data supplied at 25°C; insertion loss, phase and amplitude balance per spectrum table. OUTLINE DRAWING SM0218LC1CDA, B and C TERMINATION (50 OHMS) 2.50 [63.50] .50 [12.70] 1.0 [25.40] RF IN TERM IF 1 LSB BLOCK DIAGRAMS SM0218LC1CDA, B and C RF IN 90° IF R L RF CONNECTORS SMA FEMALE (TYP. 4 PLACES) .25 [6.35] 0° 90° IF LSB 1.00 [25.40] 2.0 [50.80] 1.75 [44.45] R L IF IF USB RF OUT RF OUT SSB UPCONVERTER IF 2 USB SM0218LC1CDQ .25 [6.35] TERMINATE UNUSED IF OUTPUT FINISH: NICKEL .50 [12.70] R L IF .075 [1.905] 2.35 [59.69] MOUNTING HOLES .100 [2.54] DIA. THRU (TYP. 4 PLACES) RF IN 90° IF R L 0° I RF OUT .25 [6.35] NOTE: All dimensions shown in brackets [ ] are in millimeters. I/Q MODULATOR Q 100 Davids Drive, Hauppauge, NY 11788 • TEL: (631) 439-9220 • FAX: (631) 436-7430 • www.miteq.com B/347 C-34B/348