15.
Set
Calibration Factor Switch (dB) on PM5B front panel to
0.3 dB
for WR6.5
and
VDI PM5B Operational Manual - Appendix 2
for current
listed
values). Note: Connect WR10 flanges of sensor and taper together for best
match.
The smaller opening should face your DUT.
16.
Connect sensor to DUT, set frequency to 110 GHz, and power level to 0 dBm
(1.00 mW), RF OFF.
17.
Ensure DUT power is off. On the front panel of the PM5B, press "Zero."
18.
Turn RF on and measure power. Measure 1.000 mW ± your accuracy in setting
the power level and ± 0.050 mW accuracy.
•
PM5B calorimeter amplitude response is flat at ± 5% across a frequency band
of 75 - 110 GHz.
•
Calibrated at DC to NIST
standards
.
•
Only the loss of the added tapers requires a Cal Factor dB setting, otherwise it
remains at 0.
2
dB
for W-Band measurements
.
•
A "Zero" of the PM5B should be done after the calorimeter is at a stable
temperature.
•
Measurement should be recorded after the reading stabilizes
(see response
time below).
Important
Notes:
Scale
90% Response Time
1
Table
2
Typical PM5B Performance
200 mW
20 mW
2 mW
200 µW
0.15 seconds
0.2 seconds
0.6 seconds
12 seconds
RMS Noise
~ 0.02 µW
~ 0.08 µW
0.03 µW
0.003 µW
1. Response time is given as the time from the application of an input to a response at the analog output of
90% of the final reading.
Keysight N1913PM5B Product Note
9
