Network Analyzers
277HP 8757 System Accessories
System Accuracy
Transmission Loss or Gain Measurement Accuracy
Transmission loss or gain measurements are made relative to a 0 dB r eference point established at calibration. Transmission measurement
uncertainty = dynamic power accuracy + mismatch uncer tainty.
Dynamic power accuracy is the measurement uncertainty due to
the change in power level between calibration and the measurement.
Mismatch uncertainty is the uncertainty due to reflections in the measurement setup. The frequency response errors of the source, detectors,
bridge and power splitter are removed via calibration.
Transmission Measurement Uncertainty Examples
Assumptions:
• Measurement frequency = 10 GHz
• DUT input/output SWR = 1.5
• Change in power after calibration <30 dB
(+0 to –30 dBm range)
Uncertainty HP 85037B precision HP 85025E
component detector detector
Dynamic
accuracy (±dB) 0.11 0.40
Mismatch (±dB) 0.45 0.33
Uncertainty Total (±dB) 0.56 0.73
absolute power measurement accuracy. The HP 85037 series detectors
are not compatible with the HP 8757E, 8757A, 8756A, or 8755.
Absolute Power Measurement Uncertainty Examples
Assumptions:
• Measurement frequency = 10 GHz
• DUT input/output SWR = 1.5
• Measured power = 0 dBm
Uncertainty HP 85037B HP 85025E
component detector detector
Absolute power
accuracy at 50 MHz (±dB) 0.11 0.40
Frequency response (±dB) 0.18 0.50
Mismatch (±dB) 0.18 0.10
Uncertainty Total (±dB) 0.47 1.00
Reflection Measurement Accuracy
Uncertainties due to calibration er ror and the frequency response of the
source, detectors, and bridges are removed via open/short averaging.
The remaining uncertainties are primarily the sum of directivity uncertainty, effective source match uncertainty and dynamic power accuracy.
See Technical Data Sheet for further information.
HP 85037 Series Precision Detectors (ac/dc)
The HP 85037 series precision detectors are designed specifically for
operation with the HP 8757D scalar network analyzer and may be used
in either ac or dc detection modes. These dual diode detectors contain
internal frequency correction factors in an internal EE PROM (read
automatically by the HP 8757D) for improved measurement accuracy
versus frequency. When used in conjunction with the HP 8757D’s internal power calibrator (Option 002), these detectors provide the maximum
Basic scalar coaxial system configured for ratio reflection and transmission
measurements.
Precision Detector Summary, HP 85037 Series For use with the HP 8757D in either ac or dc detection modes
Model range type range Frequency loss response (at 50 MHz) accuracy
HP 85037A110 MHz to Type-N (m) ac mode 0.01 to 0.04 GHz 10 dB ±0.35 dB 20 dBm ±0.25 dB ±0.25 dB
HP 85037B110 MHz to 3.5 mm (m) ac mode 0.01 to 0.04 GHz 10 dB ±0.35 dB 20 dBm ±0.25 dB ±0.25 dB
HP 85025 and 85026 Series Detectors (ac/dc)
The HP 85025 and 85026 series detectors are designed specifically for
operation with the HP 8757 scalar network analyzer and are not compatible with either the HP 8756 or the 8755. The HP 85025/26 detectors
detect either a modulated (ac) or an unmodulated (dc) microwave signal.
Frequency Connector Dynamic Return Frequency Power Dynamic Absolute
2
18 GHz 7 mm
26.5 GHz +20 to–55 dBm 0.04 to 18.0 GHz 20 dB ±0.18 dB 10 dBm ±0.11 dB ±0.11 dB
+20 to –55 dBm 0.04 to 18.0 GHz 20 dB ±0.18 dB 10 dBm ±0.11 dB ±0.11 dB
dc mode –30 dBm ±0.11 dB ±0.11 dB
+20 to –50 dBm –50 dBm ±0.85 dB ±0.85 dB
dc mode 18 to 26.5 GHz 18 dB ±0.22 dB –30 dBm ±0.11 dB ±0.11 dB
+20 to –50 dBm –50 dBm ±0.85 dB ±0.85 dB
HP 85025C Detector Adapters
The HP 85025C adapter matches the scalar analyzer display to most
standard crystal, silicon and gallium arsenide detectors. This enables
the user to operate up to 110 GHz with the HP 8757 and 8756. The
HP 85025C detector adapter is designed for use with the HP 8757 only,
and can operate in either ac or dc detection modes.
4
accuracy
Coaxial Detector Summary, HP 85025 Series For use with the HP 8757 only in either ac or dc detection modes
Model range type range Frequency loss response (at 50 Mhz) accuracy
HP 85025A310 MHz to Type-N (m) ac mode 0.01 to 0.04 GHz 10 dB ±0.8 dB 16 dBm ±0.8 dB ±0.8 dB
HP 85025B310 MHz to 3.5 mm (m) ac mode 0.01 to 0.04 GHz 10 dB ±0.8 dB 16 dBm ±0.8 dB ±0.8 dB
HP 85025D310 MHz to 2.4 mm (m) ac mode 0.01 to 0.1 GHz 10 dB ±0.8 dB 16 dBm ±1.0 dB ±1.0 dB
HP 85025E310 MHz to 3.5 mm (m) ac mode 0.01 to 0.1 GHz 10 dB ±0.8 dB 16 dBm ±1.0 dB ±1.0 dB
Frequency Connector Dynamic Return Frequency Power Dynamic Absolute
2
18 GHz 7 mm
26.5 GHz +16 to –55 dBm 0.04 to 4 GHz 20 dB ±0.5 dB 6 dBm ±0.4 dB ±0.4 dB
50 GHz +16 to –55 dBm 0.1 to 20 GHz 20 dB ±0.5 dB 6 dBm ±0.4 dB ±0.4 dB
26.5 GHz +16 to –55 dBm 0.1 to 18 GHz 25 dB ±0.5 dB 6 dBm ±0.4 dB ±0.4 dB
+16 to –55 dBm 0.04 to 4 GHz 20 dB ±0.5 dB 6 dBm ±0.4 dB ±0.4 dB
dc mode 4 to 18 GHz 17 dB ±0.5 dB –35 dBm ±0.4 dB ±0.4 dB
+16 to –50 dBm –50 dBm ±1.3 dB ±1.3 dB
dc mode 4 to 18 GHz 17 dB ±0.5 dB –35 dBm ±0.4 dB ±0.4 dB
+16 to –50 dBm 18 to 26.5 GHz 12 dB ±2.0 dB –50 dBm ±1.3 dB ±1.3 dB
dc mode 20 to 26.5 GHz 20 dB ±1.0 dB –35 dBm ±0.4 dB ±0.4 dB
+16 to –50 dBm 26.5 to 40 GHz 15 dB ±2.5 dB –50 dBm ±1.3 dB ±1.3 dB
dc mode 18 to 25 GHz 25 dB ±0.5 dB –35 dBm ±0.4 dB ±0.4 dB
+16 to –50 dBm 25 to 26.5 GHz 23 dB ±1.4 dB –50 dBm ±1.3 dB ±1.3 dB
40 to 50 GHz 9 dB ±3.0 dB
4
accuracy
5
5
HP 85037A
HP 85037B
HP 85025A
HP 85025B
HP 85025C
HP 85025D
HP 85025E
5
Internet URL www.hp.com/go/tmc99 Product & Order Info See inside back cover
Network Analyzers
278 HP 8757 System Accessories
HP R85026A
HP Q85026A
HP U85026A
HP 85027A
HP 85027B
HP 85027C
HP 85027D
HP 85027E
5
HP 8757D Option 002 Power Calibrator
The HP 8757D’s internal power calibrator provides a 50 MHz reference
standard for characterizing the absolute power accuracy and dynamic
power accuracy of the HP 85037 series precision detectors.
Frequency: 50 MHz ±0.2 MHz
Accuracy at 0 dBm: ±0.05 dB
Linearity: (over any 10 dB range)
±0.08 dB (+20 to +10 dBm)
±0.04 (+10 to –30 dBm)
±0.06 (–30 to –50 dBm)
Waveguide Detectors and Detector Adapters Summary For use with the HP 8757 only in either ac or dc detection modes
Model range type range loss response accuracy
HP R85026A126.5 to 40 GHz WR-28 +10 to –50 dBm (ac mode) 12 dB ±1.5 dB ±(0.3 dB + 0.03 dB/dB)
HP Q85026A133 to 50 GHz WR-22 +10 to –50 dBm (ac mode) 12 dB ±2.0 dB ±(0.3 dB + 0.03 dB/dB)
HP U85026A 40 to 60 GHz WR-19 +10 to –50 dBm (ac mode) 12 dB ±2.0 dB ±(0.3 dB + 0.03 dB/dB)
HP 85025C 50 to 75 GHz WR-15 +10 to –45 dBm (typical) 9.5 dB — —
Option K57
HP 85025C 75 to 110 GHz WR-10 +10 to –45 dBm (typical) 9.5 dB — —
Option K71
HP 85025C
1
The HP 85025 and 85026 series detectors and the HP 85025C detector adapter require
HP 8757A firmware revision 2.0 or higher. To upgrade previous revisions, order the
HP 11614A firmware enhancement.
Frequency Connector Dynamic Return Frequency Dynamic
+10 to –45 dBm (dc mode)
+10 to –45 dBm (dc mode)
+10 to –45 dBm (dc mode)
3
3
1 2
SMA (m)
2222
(typical)
(typical)
2
Depends upon the particular detector being used.
3
Must be used with the HP 85025C detector adapter.
HP 85027 Series Directional Bridges (ac/dc)
The HP 85027 series directional bridges are designed to operate with
either the HP 8757 in ac or dc detection modes or with the HP 8756 or
8755 in ac detection mode. These bridges offer high directivity, excellent test port match, and a measurement range of up to 50 GHz in coax.
Directional Bridge Summary For use with the HP 8757 in ac or dc detection mode or with the 8756 or 8755 in ac detection mode only
Model range impedance input test port Frequency (dB) Frequency match (SWR)
HP 85027A 10 MHz to 18 GHz 50 Ω Type-N (f) 7 mm 0.01 to 18 GHz 40 dB 0.01 to 8.4 GHz <1.15
HP 85027B 10 MHz to 26.5 GHz 50 Ω 3.5 mm (f) 3.5 mm (f) 0.01 to 20 GHz 40 dB 0.01 to 8.4 GHz <1.15
HP 85027C 10 MHz to 18 GHz 50 Ω Type-N (f) Type-N (f) 0.01 to 12.4 GHz 36 dB 0.01 to 8.4 GHz <1.15
HP 85027D 10 MHz to 50 GHz 50 Ω 2.4 mm (f) 2.4 mm (m) 0.01 to 20 GHz 36 dB 0.01 to 16 GHz <1.18
HP 85027E 10 MHz to 26.5 GHz 50 Ω 3.5 mm (f) 3.5 mm (m) 0.01 to 20 GHz 40 dB 0.01 to 8.4 GHz <1.15
1
The HP 85037A/B specifications are applicable when used with the HP 8757D scalar
network analyzer. The absolute power accuracy and dynamic power accuracy specifications apply after a calibration via the HP 8757D Option 002’s internal power calibrator.
2
Option 001 changes to a 7-mm connector.
3
The HP 85025 and 85026 series detectors and the HP 85025C detector adapter require
HP 8757A firmware revision 2.0 or higher. To upgrade previous revisions, order the
HP 11614A firmware enhancement.
Frequency Nominal Connector– Connector– Directivity Test port
8.4 to 12.4 GHz <1.25
12.4 to 18 GHz <1.43
20 to 26.5 GHz 36 dB 8.4 to 20 GHz <1.43
20 to 26.5 GHz <1.78
12.4 to 18 GHz 34 dB 8.4 to 12.4 GHz <1.25
12.4 to 18 GHz <1.43
20 to 26.5 GHz 32 dB 16 to 30 GHz <1.27
26.5 to 40 GHz 30 dB 30 to 40 GHz <1.57
40 to 50 GHz 25 dB 40 to 50 GHz typically <2.00
20 to 26.5 GHz 36 dB 8.4 to 20 GHz <1.43
4
Dynamic accuracy refers to measurement accuracy as power varies (in dB)
from a 0 dBm reference. 25˚ ±5˚C, 50 MHz.
5
DC mode, 25˚ ±5˚ C.
20 to 26.5 GHz <1.78
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