Basic Instrument Functions
R&S
®
CMW500
95User Manual 1173.9463.02 ─ 06
Note: The "IP Access Test External" shown above requires a subnet conform IP address
for the "Lan Remote" network adapter; see chapter 4.4.9, "IP Subnet Configuration",
on page 101.
When the test is started, the R&S CMW500 prompts for the appropriate cable connection,
e.g.:
A similar message ("Please disconnect...") is displayed after the test is finished.
4.4.5.4 Performing Selftests
Selftests are controlled like any other measurement. The following example shows an
"RF Loop Test" which is appropriate for a general check of the RF path.
RF Loop Test
The "RF Loop Test" is a special unit test that measures the RF path from a TRX module
to a frontend connector and back using an additional BB measurement module.
To perform the overall loop test at RF 1 COM:
1. Press the SETUP key and select "Maintenance - Selftest" from the "Setup" dialog.
The "Selftest" dialog is opened.
2. Select "Repetition Mode: Single-Shot" to perform the test only once.
3. Click the "Disable all" hotkey to clear the predefined selftest selection.
4. Open the "Unit Test > RF Loop Test > BB800 TRX 600, RF 1 COM" section and select
the RF frequencies you want to measure. Each frequency is measured at different
RF output levels.
5. Press the "ON | OFF" key to start the selftest.
The LEDs at the RF 1 COM connector light to indicate that an output/input signal is
applied. After the selftest is completed, the result at each frequency is shown in the "State"
column. The measured levels should be approx. 6 dB above the RF output levels.
Setup Dialog
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