2-11
Making Mixer Measurements (Option 089 Only)
Measurement Considerations
Setting the power range to manual prevents the internal source attenuator from
switching when changing power levels. If you choose a different power range, the R
channel offset compensation and R channel measurement changes by the amount of the
attenuator setting.
2. For this example, set the power level to −10 dBm by pressing .
3. Connect the analyzer source output, port 1, directly to the R channel input as shown in
Figure 2-9.
CAUTION To prevent connector damage on the 8719ES, use an adapter (part number
1250-1462) as a connector saver for R CHANNEL IN.
Figure 2-9 R Channel External Connection
4. To activate the frequency offset mode, press:
Since the LO (offset) frequency is still set to the default value of 0 Hz, the analyzer will
operate normally.
5. Measure the output power in the R channel by pressing:
Observe the 13 to 16 dB offset in measured power. The actual input power level to the R
channel input must be 0 dBm or less, −10 dBm typical, to avoid receiver saturation
effects. The minimum signal level must be greater than −35 dBm to provide sufficient
signal for operation of the phaselock loop.
Power −10 x1
System
Meas
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