Keysight Technologies 87405C 100 MHz to 18 GHz Preamplifier. Technical Overview

Transcription

1 Keysight Technologies 8745C 1 MHz to 18 GHz Preamplifier Technical Overview

2 2 Keysight 8745C 1 MHz to 18 GHz Preamplifier Technical Overview Introduction The Keysight Technologies, Inc. 8745C preamplifier improves overall system performance and helps reduce system errors with reliable gain and low noise figure. Compact and portable, this preamplifier can be powered directly from the instrument s probe-port which eliminates the need for a separate power supply and makes it an excellent choice for use in the field. The 8745C is designed for use with a variety of Keysight instruments such as the PSA, ESA and MXA spectrum analyzers. The rugged Type-N connectors stand up to the multiple connect and disconnects needed in field applications for reliable, repeatable measurements. Applications Low Level Signal Measurement Adding preamplifiers to measurement systems as shown in Figure 1 above can improve sensitivity and reduce the noise floor when measuring low-level signals. By adding a preamplifier to noise figure measurement systems, the total system noise figure can also be reduced. The noise figure of the system is dominated by the noise figure of the preamplifier. Signal generator Spectrum analyzer or vector signal analyzer Cable options are provided for stand alone operation, allowing this instrument to be powered up by any triple output DC source. The compact and inexpensive 87422A power supply is a suitable source of DC bias in this and other amplification applications Features Rugged, portable design for ease of use in the field Probe-power bias connection eliminates the need for an additional power supply Low noise figure of 4.5 db and high gain of 25 db helps improve the dynamic range and sensitivity of your test equipment High 15 dbm P 1dB increases available power from network and spectrum analyzers DUT Preamp Figure 1. Low level signal measurement test setup F new = F pa + F sys 1 G pa Where F and G are noise figure and preamplifier gain, both in linear terms. NF sys = 1 log (F sys ) in db For systems with a single preamplifier, where the gain of the preamplifier is greater than or equal to the spectrum analyzer noise figure, the system noise figure is approximately equal to the noise figure of the preamplifier. Figure 2. Preamplifier with spectrum analyzer test setup

3 3 Keysight 8745C 1 MHz to 18 GHz Preamplifier Technical Overview describe the product s warranted performance. Supplemental and typical characteristics are intended to provide typical but non-warranted performance parameters. These are denoted as typical, nominal or approximate. 8745C Product Specification Frequency range Gain, S 21 Flatness (+/-) Noise figure Input return loss Output return loss P 1 db Harmonics (@ +4 dbm output power) Impedance Survival input power (max) Reverse isolation Power dissipation Third Order Intercept (TOI) EMC 8745C 1 MHz 18 GHz 25 db 1.5 db 7 db ( GHz) 6 db (.5-4 GHz) 4.5 db (4-18 GHz) 15 db (.1 4 GHz) 1 db (4 18 GHz) 15 db (.1 4 GHz) 1 db (4 18 GHz) 15 dbm (.1 4 GHz) 14 dbm (4 18 GHz) 3 dbc (typical) 5 Ohms (typical) +15 dbm 5 db (typical) 2.1 W (typical) 23 dbm (typical) IEC 61326:1997 EN 61326:1997 This ISM device complies with Canadian ICES-1. Line voltage interrupt (1 cycle, 1%) IEC/EN Surge test (1.2 x 5 us,.5/1 kv) IEC/EN Electrical fast transients IEC/EN Radiated emissions Radiated immunity (3 V/m, 8-1 MHz) Conducted emissions CISPR 11, Class A IEC/EN CISPR 11, Class A Conducted immunity (3 V,.15-8 MHz) IEC/EN ESD (4 kv contact, 8 kv air discharge) IEC/EN Environmental 8745C preamplifiers are designed to fully comply with Keysight s product operating environment specifications. The following summarizes the environmental specifications for these products. Temperature Operating Storage Cycling Humidity Non-operating 45 C to +55 C 65 C to +85 C 65 C to +85 C, 1 2 C per minute, 2 minutes dwell time per MIL-STD-883F, Method 11.8, Condition C (modified) 9% one 24 hr cycle Operating 5% to 95% 4 C, 24 hour cycling, 5 times. Shock Half-sine, smoothed Vibration Broadband random Altitude Storage Temperature coefficient Gain 15 ms, 3 shock pulses per orientation, 18 total per MIL-STD-883F, Method 22.4, Condition B (modified) 5 to 2 Hz, 7. G rms, 15 minutes, per MIL- STD-883F, Method (modified) < 15,3 meters (5, feet).6 db/ C

4 4 Keysight 8745C 1 MHz to 18 GHz Preamplifier Technical Overview Mechanical Dimensions Weight: 22 grams (.485 lbs) Figure 3. Mechanical dimension for the 8745C preamplifier Dimensions are in mm (inches) nominal, unless otherwise specified. Green (ground) Black ( 15 VDC) Pin 3 Pin 1 Flat Red (+15 VDC) 1. m (39.5 in) Pin 2 1. m (39.5 in) Figure 4a. Mechanical dimension for cable option with banana plugs (8745C-11) Figure 4a. Mechanical dimension for cable option with banana plugs (8745C-11) Pin No m (39.5 in) Figure 4c. Mechanical dimension for DSUB 15-pin cable (8745C- 13) Figure 4d. Pin assignment of connector straight plug 3-pin circular

5 5 Keysight 8745C 1 MHz to 18 GHz Preamplifier Technical Overview Typical Performance Gain, S 21 (db) C Gain versus frequency (typical) Gain Figure 5. Gain specifications for the 8745C preamplifier db Noise Figure 2E+9 4E+9 6E+9 8E+9 1E+1 1.2E+1 1.4E+1 1.6E+1 1.8E+1 2E+1 Noise figure Figure 6. Noise figure specifications for the 8745C preamplifier P 1dB (dbm) 8745C P 1dB versus frequency (typical) P 1dB Figure 7. P 1dB specifications for the 8745C preamplifier

6 6 Keysight 8745C 1 MHz to 18 GHz Preamplifier Technical Overview Typical Performance (continued) 2nd harmonics (dbc) 8745C 2nd harmonics versus frequency (typical) nd Harmonics Figure 8. 2nd harmonics specifications for the 8745C preamplifier Return loss, S11 (db) 8745C Input return loss versus frequency (typical) Input return loss Figure 9. Input return loss specifications for the 8745C preamplifier Return loss, S 22 (db) 8745C Output return loss versus frequency (typical) Output return loss Figure 1. Output return loss specifications for the 8745C preamplifier

7 7 Keysight 8745C 1 MHz to 18 GHz Preamplifier Technical Overview Ordering Information 8745C Preamplifier.1 to 18 GHz Cable options (must order one) 8745C-11 Cables - banana plugs Banana plugs to be used with any triple DC output power supply, compatible with the Keysight E3631A power supply. 8745C-12 Cables - probe power bias Probe power bias to be used when connected to compatible Keysight instruments with port 3-pin probe power. 8745C-13 Cables - DSUB 15-pin 15 pin bias compatible with the Keysight 87422A remotely locatable power supply. Web Resources Related Literature Keysight Preamplifiers and System Noise Figure Application Note, literature number EN Keysight 8745C 1 MHz to 18 GHz Preamplifier, literature number EN

8 8 Keysight 8745C 1 MHz to 18 GHz Preamplifier Technical Overview mykeysight A personalized view into the information most relevant to you. Keysight Technologies, Inc. DEKRA Certified ISO 91:28 Quality Management System Keysight Channel Partners Get the best of both worlds: Keysight s measurement expertise and product breadth, combined with channel partner convenience. For more information on Keysight Technologies products, applications or services, please contact your local Keysight office. The complete list is available at: Americas Canada (877) Brazil Mexico United States (8) Asia Pacific Australia China Hong Kong India Japan 12 (421) 345 Korea Malaysia Singapore Taiwan Other AP Countries (65) Europe & Middle East Austria Belgium Finland France Germany Ireland Israel Italy Luxembourg Netherlands Russia Spain Sweden Switzerland Opt. 1 (DE) Opt. 2 (FR) Opt. 3 (IT) United Kingdom For other unlisted countries: (BP ) This information is subject to change without notice. Keysight Technologies, Published in USA, August 8, EN