Agilent 85047A S-Parameter Test Set

The 85047A S-parameter test set provides the capability to simultaneously measure the reflec- tion and transmission characteristics of two-port devices in either direction with a single connec- tion. This test set includes a frequency doubler that can be switched in by an 8753B/C Option 006 to measure 3 MHz to 6 GHz in a single sweep or switched out to measure 300 kHz to 3 GHz in

a single sweep. The 8753ES Option 011 does not use the frequency doubler, so the full 300 kHz to 6 GHz range is available. This test set exhibits

<5 dB insertion loss between the RF input and the test ports for as high as 15 dBm at the test port, and also includes a programmable step attenuator. There are two rear panel BNC outputs. One pro- vides a TTL signal which indicates the result of

a limit test. The second TTL output is controlled from the 8753ES test sequence function.

Specifications

Impedance	50 ohms
Frequency range	300 kHz to 3 GHz and
	3 GHz to 6 GHz
	(8753B/C);
	300 kHz to 6 GHz
	(8753D/E/ES Opt. 006)
Directivity1
300 kHz to 1.3 GHz	35 dB2
1.3 GHz to 3 GHz	30 dB
3 GHz to 6 GHz	25 dB
Typical tracking1
Transmission magnitude, phase3
300 kHz to 3 GHz	±1.5 dB, ±10°
3 GHz to 6 GHz	+0.5, -2.5 dB, ±20°
Reflection magnitude, phase3
300 kHz to 3 GHz	±1.5 dB, ±10°
3 GHz to 6 GHz	±1.5 dB, ±20°
Source match1
300 kHz to 1.3 GHz	20 dB
1.3 GHz to 3 GHz	16 dB
3 GHz to 6 GHz	14 dB
Normal insertion loss
Input to port 1,2
300 kHz to 3 GHz	4.0 dB +0.8 dB/GHz
3 GHz to 6 GHz	17.5 dB +0.8 dB/GHz
Input to R
300 kHz to 3 GHz	19 dB +0.5 dB/GHz
3 GHz to 6 GHz	34 dB +0.5 dB/GHz
Port 1,2 to A,B	16 dB
Typical isolation4
300 kHz to 3 GHz	100 dB
3 GHz to 6 GHz	90 dB

Test port switch	±0.03 dB; ±0.01 dB4
repeatability
Maximum operating level	+20 dBm
Damage level	+30 dBm
RF attenuator range	70 dB (10 dB steps)
DC bias range	±30 VDC, 200 mA,
	no degradation in RF specs,
	1A max.
RF connectors
Port 1,2	7 mm precision
All others	50 ohm type-N(f)
Dimensions	90 mm H x 432 mm W x
	553 mm D
Weight	10 kg (22 lb)

A standard 85047A test set contains a solid-state transfer switch, which allows continuous switching of power from port 1 to port 2 for full two-port error correction.

Agilent 85047A Schematic

1.This can be greatly improved with accuracy enhancement.

2.Some degradation at environmental extremes below 600 kHz.

3.Degrees, specified as deviation from linear phase.

4. Typical performance.