Upconverter Settings
R&S
®
SGU100A
79
User Manual 1176.7726.02 ─ 09
By default, the instrument operates in "Table & On" mode to provide the highest
level accuracy and fastest setting time. Level control can be switched to "Off
(Table)" or "On" for particular applications. The "Off (Table)" state (level control Off)
is recommended if in CW mode the signal/intermodulation ratio is to be improved
for multi-transmitter measurements.
State
Sets the internal level control.
"Table & On"
Default mode.
First sets the level to the target value using the internal level table.
Then activates the level control circuit to achieve maximum level
accuracy.
"On"
Internal level control is permanently activated.
If "On" and "Attenuator Mode Fixed" is selected, the level is recalibra-
ted for every level and frequency setting.
"Off (Table)"
Internal level control is performed according to the ALC table.
Remote command:
Detector Sensitivity
Allows you to fix the internal level detector. It is recommended to use the Auto mode
(default).
"Auto"
Automatic detector selection. Recommended mode of operation.
"Low"
Low sensitivity detector selected.
This setting is intended for signals with high internal electronic levels.
"Med"
Medium sensitivity detector selected.
This setting corresponds to normal mode. It is intended for signals
with medium internal electronic levels.
"High"
High sensitivity detector selected.
Selects the detector path with high sensitivity, intended for signals
with low internal electronic levels.
"Fix"
Fixes the last set sensitivity setting.
7.3
I/Q Modulation and Signal Impairment
The R&S
SGU offers I/Q modulation with external analog I/Q signals. I/Q modulation
with an external analog I/Q signal is possible for the instrument equipped with fre-
quency options R&S
SGU-B120V/-B140V. The external signal is input via the [I IN] and
[Q IN] connectors and transferred to the I/Q modulator.
Before the signal is fed into the I/Q modulator, the signal can be impaired. Impairment
at this point along the signal flow is offered to allow error correction of the supplied sig-
nal or set dedicated impairments.
I/Q Modulation and Signal Impairment