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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)
Directivity
1
300 kHz to 1.3 GHz 35 dB
2
1.3 GHz to 3 GHz 30 dB
3 GHz to 6 GHz 25 dB
Typical tracking
1
Transmission magnitude, phase
3
300 kHz to 3 GHz ±1.5 dB, ±10°
3 GHz to 6 GHz +0.5, -2.5 dB, ±20°
Reflection magnitude, phase
3
300 kHz to 3 GHz ±1.5 dB, ±10°
3 GHz to 6 GHz ±1.5 dB, ±20°
Source match
1
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 isolation
4
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.
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.
Agilent 85047A Schematic