Anritsu ME7840A manual System Description, 9SYSTEM, DRA Scorpion

GENERAL INFORMATION SYSTEM DESCRIPTION

Table 1-1.Test Set Configurations

Model	Frequency Range	Max AUT Power Output	Reverse Measurements	Circulator
	(MHz)	(Watts)	(S22, Hot S22, S12 Possible)	(at AUT Output Path)
MS4782A	800 to 1000	50	Yes	Internal
MS4782D	800 to 2400	100	Yes	External
	(Note 1)	(Note 2)

Notes:

1.This frequency range does not account for any restricting effects caused by use of external circulator.

2.This Max AUT power assumes a minimum isolation of 23 dB provided by external circulator(s). Two circulators may have to be used to provide the required isolation.

1-9SYSTEM	Brief descriptions of the DRA Scorpion (MS462XC) and MS4782X Test
DESCRIPTION	Set are given below.
DRA Scorpion	The Scorpion Direct Receiver Access (DRA) version Vector Network Mea-
	surement System (VNMS) (Figure 1-2)functions under control of the soft-
	ware residing in the PC through GPIB commands. The software supports
	tuning and alignment operations by generating real time graphic displays
	of the measured data on the PC screen.
	Under software control, 3rd, 5th and 7th order IMD products can be mea-
	sured and displayed. Also, the Upper and Lower Side Band (USB & LSB)
	components of the IMD products are measured and displayed separately.
	The DRA Scorpion includes the following capabilities:
		￿ Two internal, independent RF sources. Each source has a range of
		–15 dBm to +10 dBm. A 0dB to 70dB step attenuator (10 dB / step)
		is provided for each source resulting in a Power Output range of
		–85 dBm to +10 dBm from each source.
		NOTE
		After test set losses, the maximum net power at the input of the amplifier
		under test (AUT) is +5 dBm.
		￿ Complete built-in capability for IMD measurements. A combiner is
		provided in the Test Set.
		￿ Internal Transfer Switch enabling S22 and Hot S22 measurements.
		The reflectometer set-up is provided in the Test Set.
		￿ Direct access to each of the four receiver channels (two reference
		channels and two test channels) for maximum flexibility in measur-
		ing forward and reverse S-parameters over a wide range of AUT
		output power. The Test Set provides incident and reflected signal
		separation.

ME7840A OMM 1-5