Test - R&S EB200 Manual

EB200 Manual Operation

3.18.4.5 TEST

This menu is obtained by pressing the TEST softkey in the RX-CONF menu
Note:
If the processor is equipped with the expansion RAM, instead of is displayed.
It the EB 200 is equipped with a new IF section (produced as from 4. 2000), IF SECTION.2 appears on
the display. This IF section has an extended dynamic range. Level measurements can be made up to
85 dBµV (with ATT ON 113 dBµV) without overdrive. If overdrive occurs, the symbol is displayed.
With the new IF section, the 30 dB attenuator cuts in at the overdrive limit of 85 dBµV and switches off
with a hysteresis of 7 dB.
Softkey
LONGTEST Starts a complete unit testing procedure
At the LONGTEST all test spectrum lines are scanned. At first two runs with attenuator and the
bandwidth 150 kHz and/or 15 kHz are carried out. With that the preselection is bypassed first and
feeding-in takes place directly at the Frontend. If both of the runs supply an error-free result, a third run
with disconnected attenuator is carried out. If also this run does not supply any errors, a short test is
carried out with the current receive frequency.
As a result the OK message "TEST OK , RF RANGE AND SIGNAL PATHES" or an error report is
output. The error reports are determined as follows:
1. or. 2. test run reports errors:
If all measuring frequencies report errors the message "SENSITIVITY OUT OF RANGE" is generated.
Otherwise it is checked whether all measurement points produce errors at a specific bandwidth. In this
case the message "IF PREFILTER WIDE DEFECTIVE" or "IF PREFILTER NARROW DEFECTIVE" is
generated.
If the error fits into neither category a list with up to 4 faulty frequencies and an error message like eg
"LEVEL TOO HIGH AT 128 MHZ" is output.
1st and 2nd test runs do not report any error, 3rd test run reports error:
If all measuring frequencies report errors the message "SENSITIVITY OUT OF RANGE" is generated.
Otherwise error messages for those preselection ranges are generated in the frequency range of which
faulty measuring points are located.
4052.2000.02 3.43 E-7