pdf version - Nearfield Systems Inc.

RF Products
NSI-RF-7020
High Speed Synthesizer
DESCRIPTION
The NSI 7020 Panther High Speed Microwave Synthesizer is designed specifically to address the demanding
needs of the antenna test community. The Panther 7020 is a high performance synthesizer designed for highspeed frequency switching applications. The 7020 is compatible with a wide variety of receivers, including the
NSI Panther 9100 and the Agilent PNA.
SYSTEM BLOCK DIAGRAM
FEATURES
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Up to 10,000 frequencies per second (100
µsec/pt.) - reducing antenna test time and
improving range productivity
0.1 to 20.0 GHz
Power output +8 dBm typical
Compatible with a variety of receivers
Built-in pulse modulator with TTL modulation
input
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Remote operation with 30m (100 ft.) control cable
Fully integrated with NSI 2000 antenna measurement
software
Stand-alone applications, or
NSI driver provided as part of Panther 9100 receiver
system with high-speed beam controller (HSBC)
Resolution: 10 Hz
Parallel BCD interface
CONSISTS OF THE FOLLOWING COMPONENTS
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NSI-RF-7020 synthesizer unit
Driver for integration with NSI Antenna
Measurement Software
Driver for integration with NSI Panther 6000
Receiver with HSBC
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Power supply cord
Installation and operation manual
Two year warranty
SPECIFICATIONS
Power Out
+8 dBm typical
Frequency Range
0.1 to 20.0 GHz
Frequency Switching
Speed
10,000 frequencies per second (100
µs/pt.)
Frequency Resolution 10 Hz
-18 dBc, typical
Harmonics
-90 dBc/Hz at 1 kHz offset
Phase Noise
Frequency Stability (Note 1)
4x10E-8/day, 8x10E-6/year, ±4x10E6/0-50 °C
Software Interface
Support for NSI Antenna
Measurement Software and Panther
9100 Receiver/HSBC
Computer Interface
Differential BCD
RF Outputs
SMA female
Size (HxWxD)
8.75” x 17.0” x 18.0”
Controls and Indicators
DC power indicator, Band selection:
x1, x2, x4, off indicator, pulse mode
enabled, input pulses
Frequency Reference In
10 MHz, BNC connector
Frequency Reference Out
10 MHz, BNC connector
Compatible with NSI 2000 Antenna Measurement Software
- this example shows a multi beam data set.
NSI-RF-7020 Output Power vs Frequency
Note 1: For greater accuracy, the source can be locked to an external standard.
OPERATION
The Panther 7020 Synthesizer has a parallel BCD interface to set the
frequency. The frequency list is loaded into the beam controller (NSI
High Speed Beam Controller - HSBC). During a measurement, the beam
controller sets the frequency of the 7020 synthesizer.
NSI-RF-7020 Harmonics vs Frequency
NSI provides full program support for the Panther 7020 with its NSI 2000
Antenna Measurement Software. For other applications, NSI provides
the drivers required for integration with the Panther 9100 receiver with
High-Speed Beam Controller (HSBC). For stand-alone applications, NSI
provides the differential BCD control interface definition.
NSI Panther 9100-based RF systems offer a unique accuracy-enhancing
feature that takes advantage of the NSI-RF-7020’s speed and flexibility.
Planar near-field measurements are subject to measurement errors
caused by spurious outputs of the wide-band sources at specific test
frequencies. Even though these “spurs” are well below the desired
signal output (-60 to -80 dBc), the additive nature of the near-to-far-field
transform multiplies the effect of the errors. In NSI Panther systems, we
take advantage of the Panther‘s fast firmware to “dither” the frequency
of the source between each measurement point, returning to the desired
test frequency before the next point is recorded. With this scheme the
phase of the desired signal is maintained, while the phase of any “spur” is
randomized. Because spurs are now randomized in phase, the near-to-far
field transform will reduce rather than increase the errors caused by spurs.
ORDERING INFORMATION
Please contact the NSI Sales department to order this product.
Nearfield Systems, Incorporated
19730 Magellan Drive, Torrance, CA 90502, USA, Tel: 310.525.7000, Fax: 310.525.7100
Email: [email protected]. Visit our website: www.nearfield.com

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