Atec Agilent-8753E - Manual (Page 19)

HP 85046A/B S-parameter test sets
The HP 85046A/B S-parameter test sets provide the capa-
bility to measure reflection and transmission characteris-
tics (including S-parameters) of two-port devices in either
direction with a single connection. The test sets are
controlled from the HP 8753E Option 011 and include
a programmable step attenuator. The frequency range of
the HP 85046A 50-ohm test set is 300 kHz to 3 GHz. The
HP 85046A has precision 7-mm connectors. The frequency
range of the HP 85046B 75-ohm test set is 300 kHz to
2 GHz. The HP 85046B has 75-ohm type-N(f) connectors.
Both connectors can be adapted to other interfaces with
the appropriate precision adapters.
Specifications HP 85046A(B)
Impedance 50 ohm (75 ohm)
Frequency range 300 kHz to 3 GHz
(300 kHz to 2 GHz)
Directivity 35 dB to 1.3 GHz
30 dB to Fmax 1
Typical tracking
Transmission magnitude, phase 2
0.3 MHz to 2.0 MHz ±1.5 dB, ±20°
2.0 MHz to Fmax ±1.5 dB, ±10°
Reflection magnitude, phase 2
0.3 MHz to 2.0 MHz ±1.5 dB, ±25°
2.0 MHz to Fmax ±1.5 dB, ±10°
Effective source match
0.3 MHz to 2.0 MHz 14 dB
2.0 MHz to 1.3 GHz 20 dB (17 dB)
1.3 GHz to Fmax 16 dB
Nominal insertion loss
Input to test port 14 dB + 0.5 dB/GHz
(19.5 dB + 1 dB/GHz)
Input to incident 18 dB + 1.5 dB/GHz
(18 dB + 1.5 dB/GHz)
Port 1, 2 to A, B 6.5 dB + 1.0 dB/GHz
(12 dB + 0.5 dB GHz)
Test set switch/repeatability 3
±0.03 dB
Max. operating level +20 dBm
Damage level +30 dBm
RF attenuator range 70 dB (10 dB steps)
DC bias range ±30 VDC, 200 mA (some
degradation of RF specs)
500 mA max
DC bias connectors 50 ohm BNC (f)
Includes four 190 mm (7.5 in) type-N
cables and test set interconnect
cable.
Dimensions 90 mm H x 432 mm W x 553 mm D
Weight 9.1 kg (20 lb)
A standard HP 85046A/B 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 correc-
tion. Option 009 replaces the transfer switch with
a mechanical switch. This provides about 1.5 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 85046A schematic
19
HP 8753E test set specifications
1. Fmax is the upper frequency limit of the associated test set.
2. Degrees, specified as deviation from linear phase.
3. Typical repeatability is ±0.01 dB.