WERA HF Radar Test Instruments

1.	1	100 MHz Oscilloscope (e.g. TEK 7603 or newer), capable to display X-Y mode
2.	1	Step Attenuator for 1 dB steps (e.g. HP 355 C)
3.	1	Step Attenuator for 10 dB steps (e.g. HP 355 D)
4.	1	HF Powermeter (e.g. Bird Model 43 + Module 100H [2-30 MHz, 100W])
4a.	1	Power Attenuator -30dB (~100W) for lab tests of the power amp.
5.	1	Multimeter to measure e.g. line power voltage
6.	1	Calibration Box (power splitter 1:16, 0 degrees, resistive)
7.	20	Coax N-male to BNC-female Adapters
8.	20	BNC 50 Ohms terminators 1 Watt
9.	3 to 5	N-N, BNC-BNC connectors (male-male and female-female)
10.	5	BNC RG 58/U cables, 1 m and 3 m long
11.	1	Portable SW Receiver with SSB capability to check frequencies (optional)
12.	1	Spectrum Analyzer (e.g. TEK 496 or newer) to check frequencies (optional)
13.	1	For antenna array calibration with a ship, an oven controlled synthesizer, at least 1 Hz steps, output power -30 dBm ... + 27 dBm, e.g. HP 3335A +MAW 592 (optional)

Remarks:

• The step attenuators (positions 2 and 3) are no longer required during normal operation. There is now an adjustable attenuator installed inside each power amplifier.
• The SW receiver (position 11) is required to check for interference and noise; helpful during siting e.g. in industrial areas.
• The spectrum analyser (position 12) is required to check for
  • a) possible radio interference from radio stations and
  • b) harmonics and spurious transmissions of the WERA radar signal.