HPPR/2
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5.5 Wobble
The recently introduced wobb reflection has the following features:
• The wobble display represents the amount of the reflection coefficient at the probe
connecter of the corresponding HPPR/2 module.
• A quantitative statement on the reflected power and of the probe Q can be made.
• The HPPR/2 acts as a network analyzers s11 measurement.
TS4.0 (or later) uses the individual calibration data of the appropriate preamplifier unit to
calculate the exact reflection coefficient at the HPPR Probe port in direction to the probe
(same as the s11 measurement of a network analyzer).
To do this, the calibration data file of the individual HPPR/2 module must be loaded to the
spectrometer. The calibration data files are available from the Bruker-CH FTP server (ftp://
ftp.bruker.ch/NMR/download/preamplifier/). Folder- and filenames are according part number
and serial number of your individual HPPR/2 module. The calibration file is available for all
HPPR/2 modules with a production date after 1.1.2012.
Copy the file into the appropriate spectrometer directory (conf/instr/<spect>/preamp/) and
start wobb reflection.
5.6 Abbreviations
Cover2 Z124567 HPPR/2 COVER2 MODULE
Z144595 HPPR/2 MRI COVER2 MODULE
ADM Active Detuning Module
ATMA Automatic Tuning and Matching Accessory
BIS Bruker Information System
CRP Cryo Probe
PK Peak (peak power)
CW Continuous Wave (CW power)
HPPR/2 High Performance Preamplifier Version 2
HPLNA High Power Low Noise Amplifier
IFB HPPR/2 Interface Board (interface from the module to the
Preamp-Bus)
INCR_AQ see INTERLEAVE_INCR
INTERLEAVE_INCR Interleave Increment Pulse
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