Lo Signal Power Control; Operator Check; Perform The Operators Check - HP 85106D Manual

LO Signal Power
Control
Table 2-2
Frequency
Range
Frequency
Band
Source #1
(RF) Power
Source #2
(RF) Power

Operator Check

CAUTION
Perform the Operators
Check
Operation
Operating Notes
LO signal power is controlled using the {
Table 2-2 for recommended and expected LO signal power levels.
Recommended RF and LO Power Levels For All Bands
45 MHz - 50 GHz 33 GHz -50 GHz
Coaxial
(option001)
Q-band
WR-22
−
+10 20
+3 +3
To perform an operator's check, complete the following:
•
Measure the power levels of the HP 8510C user parameters a1, b1, a2,
and b2.
•
Observe the appropriate levels (listed in Table 2-3 on page 2-16) to be
certain that the system is operating properly.
•
For complete system verification, refer to Chapter 3, "Performance
Verification" in this manual.
Do not increase source #1 power level or connect a device with gain that is
greater than -13 dBm as shown in these measurements. Greater than about
-10 dBm can result in mixer compression errors, and greater than
+27 dBm can damage the first frequency conversion stage. System
specifications apply when the source #1 power is set as listed in Table 2-2 on
page 2-14.
The following measurements show approximate RF signal levels incident at
the first frequency conversion stage and given in dBm (even though the
marker value read-out is in dB). During this procedure you may adjust the
RF source #1 power level, this will change the available power at the test
port, and thus the IF signal level.
This measurement is important for setting signal levels in preparation for
measuring components. This is especially true for amplifiers. The maximum
signal applied to Port 2 (or Port 1) without damage depends upon the band,
exceeding +27 dBm can cause damage. If the IF signal level exceeds about
-10 dBm, measurement errors due to compression result.
2-14 HP 85106D mm-Wave System
SOURCE #2 POWER
40 GHz -60 GHz 50 GHz -75 GHz
Waveguide
U-band V-band
WR-19 WR-15
− −
25 30
+3 +3
} function. Refer to
75 GHz -110 GHz
W-band
WR-10
−
20
N/A