HP 8340B Manual page 191

5-14. UNLEVELED RF OUTPUT ADJUSTMENTS (Cont'd)
60. Access Cal Constant 4 by pressing the following key sequence on the OUT:
[SHIFT][GHz][4] [Hz]
[SHIFT][MHz] [1] [2] [Hz]
[SHIFT][kHz] [2] [2] [Hz].
If the OUT is an HP 8341 B, proceed to step 62.
61. Using the OUT's rotary knob, adjust Cal Constant 4 (range is 0 to 131) to optimize the power in
Band 4.
62. Access Cal Constant 3 by pressing the [~] step key. Using the OUT's rotary knob, adjust Cal
Constant 3 (range is 0 to 131) to optimize the power in Band 3.
63. Access Cal Constant 2 by pressing the [~] step key. Using the OUT's rotary knob, adjust Cal
Constant 2 (range is 0 to 131) to optimize the power in Band 2.
64. Access Cal Constant 77 by pressing [SHIFT] [GHz] [7] [7] [Hz] [SHIFT][ENTRYOFF] on the
OUT. Using the OUT's rotary knob, adjust Cal Constant 77 (range is —25 to +25) for optimum
power at the band switch points. If this Cal Constant has no effect, reset it to —25.
65. Press the [a.] step key to access Cal Constant 78. Using the OUT's rotary knob, adjust Cal
Constant 78 (range is —25 to +25) for optimum power at the band switch points. If this Cal
Constant has no effect, reset it to +25.
66. Press [RECALL]on the OUT and iterate between registers 1 and 2 by pressing [1] and then [2].
Verify that the fast sweep speed trace (register 2) is no more than 1 dB below the slow sweep
speed trace (register 1) at any point (ignore squegging which is most likely occurring in Band 1).
Also, the minimum power point on the fast sweep speed trace should be
maximum leveled power specifications for each band (again, ignore squegging in Band 1). If either
of the above conditions are not met, repeat steps 59 through 66.
67. Iterate between registers 1 and 3 and verify that the single sweep trace (register 3) is no more than
below the slow sweep trace at any point (ignore squegging which is most likely occurring in
2 db
Band 1). After pressing [3] on the OUT you need to press [SINGLE]to initiate the single sweep.
Also, the minimum power point on the single sweep trace should be> 1 dB above the maximum
leveled power specifications for each band (again, ignore squegging in Band 1).
above conditions are not met, repeat steps 59 through 67.
68. Press the following key sequence on the OUT:
[RECALL] [ 2]
[SHIFT][GHz] [1] [Hz]
[SHIFT][ENTRYOFF] [5] [0] [0] [Hz] (Sets Cal Constant 1 to 500)
Adjust A28R13 (ORP) for optimum power across the entire frequency range.
69. Press the following key sequence on the OUT:
[50] [Hz] (Resets Cal Constant 1 to
[SHIFT][MHz] [1] [4] [Hz]
[SHIFT][kHz] [5] [3] [4] [9] [Hz]
Wait for "CALIBRATION STORED" to be displayed in the OUT's ENTRY DISPLAY and then press
[INSTRPRESET].
HP 8340B/41B
50)
> 1 dB above the
either of the
If
Adjustments 5-85