Network Analyzers
264 HP 8757 System Accessories
HP R85026A
HP Q85026A
HP U85026A
HP 85027A
HP 85027B
HP 85027C
HP 85027D
HP 85027E
5
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.
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. These bridges offer
high directivity, excellent test port match, and a measurement range of
up to 50 GHz in coax.
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 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)
Directional Bridge Summary For use with the HP 8757 in ac or dc detection mode
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
System Accuracy
Transmission Loss or Gain Measurement Accuracy
Transmission loss or gain measurements are made relative to a 0 dB reference 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.
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
12.4 to 18 GHz 34 dB 8.4 to 12.4 GHz <1.25
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
20 to 26.5 GHz <1.78
12.4 to 18 GHz <1.43
20 to 26.5 GHz <1.78
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
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