HP 8530A, Руководство по эксплуатации и программированию, Страница: 402 / 439

Common Error Messages
E
\ENCODER NOT FOUND"
The HP 85370A P osition Encoder is not connected to the back of the HP 8530A.
\ENCODER OFFSET ANGLE ALREAD Y S A VED"
The receiver does not allow you to press
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SAVE OFFSET twice in the same sweep, unless you
clear the rst oset. If you want to change the oset value (without taking another sweep),
press
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
CLEAR OFFSET , then
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SAVE OFFSET .
F
\FREQUENCY CONVERTER IS TOO HOT!"
Occurs if the fan on the HP 8511A/B frequency converter is blocked with paper or other
object. Items on top of the frequency converter or around the system may also impede the air
ow . The test set will not shut down if it becomes too hot!
I
\IF O VERLO AD"
This occurs if the power going to any receiver input is greater than -10 dBm. Y ou should lower
the power level going to the inputs .
System cables can have less power loss at lower frequencies . Long cables can cause signicant
losses at high frequencies . If you turn RF power up , you might overdrive the receiver inputs at
lower frequencies . Solve this problem using the P ower Slope feature . P ower Slope increases RF
power as the sweep progresses . This feature is explained near the end of Chapter 6, Stimulus .
In Case of Diculty 20-7