HP 85106D, Manual

Page: 193 / 244

6-28 HP 85106D mm-Wave System
HP 85105A mm-Wave Controller
RF and LO Output Power at Front Panel Ports
RF and LO Output Power at Front Panel Ports
Procedure 3
Figure 6-13 Front Panel RF and LO Ports
1. Run the system software and select {
HIGHBAND
} to make the mm-wave
controller active.
2. Choose a power meter that covers the 4 to 21 GHz frequency range of
interest (HP 436A Meter and HP 8485A sensor). Calibrate the power
meter and attach a 3.5 mm, 10 dB fixed attenuator (HP 8493C) and a
female-to-female adapter to the sensor.
3. Attach the power sensor to the LO output on both ports 1 and 2. Select
{
SINGLE POINT MODE
} from the [
STIMULUS
] menu, then using the RPG
knob, slowly scan over the frequency band. The power out should be
+22 dBm
±
2 dB.
4. Attach the power sensor to the RF output of the active port, measure the
power out then select the other port and measure its RF output power.
Select from the [
STIMULUS
] menu, then using the RPG knob, slowly scan
over the frequency band. The RF power out should be >+17 dBm for
both ports (>+16 dBm, 20 to 21 GHz).