HP 83522A Service Notes page 81

Adjustments Model 83522A
ADJUSTMENTS
5-22. POWER CALIBRATION (Cont'd)
NOTE
If the following steps result in A4R6 and A4R7 being adjusted near the
stops, connect DVM low to A4TP15 (floating ground) and DVM high to
A4TP12. Adjust A4R59 for -0.2 mV k 0 . 0 1 mV.
2. Remove detector and connect power meter to RF OUTPUT. On 8350A, press
to turn off modulation (annunciator off). Adjust A4
RF OUTPUT
power at the 83522A connector of +O dBm k0.1 dBm. Set
note power meter reading, then set
pomg
to +2 dBm and
The deviation from 0 dBm should be equal and opposite. If not, readjust A4R6 (0 LO).
3. Set power for front panel indication of +9 dBm. Adjust A4R7 (0 MD) for RF OUTPUT
power at the 83522A connector of +9 dBm f 0.1 dBm.
4. Iterate steps 2 and 3 until low and midpower ranges are calibrated.
5. Set power for front panel indication of +13 dBm. Adjust A4R2 (0 HI) for RF OUTPUT
power at the 83522A connector of +13 dBm k0.1 dBm.
6. Step the RF power in 1 dB intervals from +O to +13 dBm. RF OUTPUT power at the
83522A connector should be the indicated front panel setting fO.l dBm. If necessary,
readjust 0 LO, 0 MD, and 0 HI to calibrate power.
0 H i
BMO
0
LO OFS 3
A4R2 A4R7 A4 R6
A4R59
Figure 5-22. Power Calibration Adjustment Location