DETAILED OPERATION
CARRIER FREQUENCY
The carrier frequency is selected from the main menu
by
pressing [Carrier
Freq.J,
unless
it is already
highlighted
as
in
the default display.
Enter the
required value via
the
numerical key
pad.
The value can then be incremented or
decremented using the control knob and its associated keys, [KNOB UP-DN],
[xlO] and
[+10].
If a value outside the specified range is requested, the message:
ERROR 51: Carrier Outside Limits
is displayed on the screen
when
the
terminator
key
is pressed, and the instrument is automatically
set to the end of the range.
Carrier
ON/OFF
The
carrier may
be
switched ON
or
OFF
at
any time via the [CARR ON-OFF] key. This
effectively switches the output ON and OFF,
retaining
the 50 Q output impedance.
OUTPUT LEVEL
The output level is selected at the Sig
Gen
menu by pressing [RF Level] and entering the
required
value
on the
numerical key pad.
If a value outside the
specified range is requested the
message:
ERROR 52: RF
Level
Outside Limits
or
ERROR 17: RF Level limited by AM
is displayed and the instrument is automatically set to the end of the range.
Choice of units
Units may be pV, mV, V or dB. Conversion between dB and the
voltage
units is carried
out by pressing the
appropriate
units key, i.e. to change dBm to a
voltage unit, press any voltage
key for the correct conversion. The choice of Volts EMF, Volts PD, and the dB reference is
made by using the
[RF
Level Units
]
utility, see Page
3-1-40,
'RF
level units'.
Reverse
power protection
Accidental application of power
to
the RF OUTPUT socket trips the reverse power
protection circuit (RPP) and a flashing message
appears
on the
display,
see
Fig.
3-1-7.
3-1-12
46882-074C
To Next Page
Loading...