Varian UNITY INOVA NMR, Hardware Installation, Page: 32 / 65

01-999044-00 C0501 UNITY INOVA Solids Hardware Installation
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Chapter 5.
Wideline Module Tests
This chapter contains test procedures for the wideline module. The tests are broken into two
groups as follows:
RF transmitter performance tests:
•
Liquids observe transmitter rf signal path
•
Solids observe transmitter rf signal path
•
Decoupler transmitter performance
•
Solids cabinet status light and safety switch performance
NMR tests:
•
Wideline solids test sample kit
•
Deuterium 90° pulse and system sensitivity measurement
•
Sodium 90° pulse and sensitivity measurement
•
System recovery time
•
Wideline spectral appearance
•
Liquids performance
CAUTION:
Read the following cautions:
• Make sure that all amplifiers are terminated in appropriate 50-ohm
loads at all times.
• The high power available from the amplifier in the solids cabinet is
intended only for solids experiments. Applying this power to a liquids
probe will destroy the probe. Before turning on the amplifier in the
solids cabinet, check that the appropriate solids probe has been put in
place.
• Always disable all high-power solids amplifiers before installing any
probe.
• Confirm that the rf signal being measured can never exceed the
maximum input signal of the measuring device.
• Do not block any of the ventilation holes in the solids cabinet. Even on
standby, the amplifiers radiate considerable heat.
5.1 Testing RF Transmitter Performance
This series of tests evaluates the solids cabinet relay and attenuator operation as well as the
1 kW amplifier power output and performance.
Liquids Observe Transmitter RF Signal Path
1. Recall the parameters: rtp('/vnmr/stdpar/H2') .