3-2
Troubleshooting
If You Encounter a Problem
If You Encounter a Problem
If the signal generator is not operating as you expected, look for help in the
following list of symptoms and possible solutions. If you do not find a solution
here, refer to the service guide.
• No RF Output?
The front panel RF On/Off key must be set to On before the RF signal is available
at the RF OUTPUT connector. Check the annunciator on the display. If it reads
RF OFF, press the RF On/Off key once to toggle the RF output on.
• RF Output Power too Low?
If the RF output power seems too low, look for an OFFSET or REF indicator in the
amplitude area of the display.
OFFSET tells you that an amplitude offset has been set. An amplitude offset
changes the value shown in the amplitude area of the display but does not affect
the output power. The amplitude displayed is equal to the current power output by
the signal generator hardware plus the value for the offset. To eliminate the offset,
press
Ampl, Ampl Offset. Enter 0 using the numeric keypad and press the dB
terminator softkey.
REF tells you that the amplitude reference mode is turned on. When this mode is
on, the displayed amplitude value is not the output power level; rather, it is the
current power output by the signal generator hardware minus the reference value
set by the
Ampl Ref Set softkey. To exit the reference mode, press Ampl and toggle
the
Ampl Ref softkey to Off. You can then reset the output power to the desired
level.
• No Modulation at the RF Output?
Although you can set up and enable various modulations, the RF carrier is
modulated by the enabled modulation only when you have also set
Mod On/Off to
On. Check the annunciator on the display. If it reads MOD OFF, press the
Mod On/Off key once to toggle the modulation on.
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