ANALOG MODULATION MODE
3-81
RF offset
With the instrument unlocked to Level 1, see 'Locking and unlocking' above, pressing
[Offsets]
produces the layout for the soft keys shown in Fig. 3-79.
Offset
Value
Carrier
Freq.
LOCAL
Enable/
Disable
Offset
ON/OFF
EXIT
Save
Offset
Carrier :
Feq.
RF Level :
dBm
MHz
Offsets: DISABLED
Offset (675MHz - 1.35GHz) :
0.0
dB OFF
1 050.000 000
-102.0
ON
C1484
Fig. 3-79 RF offset adjustment menu
To compensate for cable or switching losses or to standardize a group of instruments so that they
give identical measurements, the RF output level can be offset by up to
±
2 dB. This is done by
selecting
[Offset Value]
and either keying in the value or making the adjustment with the control
knob. A separate offset can be set for the carrier frequency range 10 kHz to 337.5 MHz and each
octave above this. Offsets can be turned on or off individually using the
[Offset ON/OFF]
key or
all offsets can be turned on or off via the
[Enable/Disable]
key.
This facility is replaced by a more versatile system on generators supplied with Option 008,
RF profiles and complex sweep (see Annex B).