Atec Agilent-8753E - Manual (Page 20)

20
HP 8753E test set specifications, cont’d
HP 85047A S-parameter test set
The HP 85047A S-parameter test set provides the
capability to simultaneously measure the reflection
and transmission characteristics of two-port devices in
either direction with a single connection. This test set
includes a frequency doubler that can be switched in by an
HP 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 HP 8753E 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 provides a TTL signal which indicates the result of a
limit test. The second TTL output is controlled from the
HP 8753E test sequence function.
Specifications HP 85047A
Impedance 50 ohms
Frequency range 300 kHz to 3 GHz and 3 GHz to
6 GHz with HP 8753B/C; 300 kHz
to 6 GHz (HP 8753E 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 4.0 dB +0.8 dB/GHz (3 GHz range)
17.5 dB +0.8 dB/GHz (6 GHz range)
Input to R 19 dB +0.5 dB/GHz (3 GHz range)
34 dB +0.5 dB/GHz (3 GHz range)
Port 1,2 to A,B 16 dB
Typical isolation 100 dB (3 GHz range)
90 dB (6 GHz range)
Test port switch
repeatability 4 ±0.03 dB
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 HP 85047A test set contains a solid-state trans-
fer switch, which allows continuous switching of power
from port 1 to port 2 for full two-port error correction.
Option 009 replaces the transfer switch with a mechanical
switch. This provides about 2.5 to 3.5 dB more power at
the test port, but does not allow continuous switching, so
the user must initiate updates of all four s-parameters for
full two-port error correction. Also, the mechanical switch
has relays that will wear out faster than the solid-state
switch. Approximate lifetime of the mechanical switch is
1 million cycles.
HP 85047A Schematic
1. These 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 repeatability is ±0.01 dB.