HP 8560A, Руководство по обслуживанию

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15. External Mixer Amplitude Adjustment
Adapters
Type N (f) to SMA (f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Type N (m) to BNC (f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Type APC 3.5 (f) to APC 3.5 (f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cables
(48in) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10503A
(24in)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..8120-1578
Procedure
1. Set the HP 8560A switch off and disconnect the power cord. Remove the analyzer
cover and reconnect the power cord.
2. Set up the equipment as illustrated in Figure 2-18. Do not connect the SMA cable to the
HP 8560A.
3. Move the WR PROT/WR jumper on the A2 Controller assembly to the WR
position. Set the HP 8560A switch on.
On the HP press
CNV LOSS VS .
EXTERNAL MIXER AMPTD CORRECT , then
On the HP press MORE OF 2, SERVICE CAL DATA, 3RD IF AMP, and
CAL 3RD AMP GAIN. Wait until the message ADJUSTMENT-DONE appears in the active
function block.
Note
Perform the following steps only if the HP 8560A does not have Option 002.
6. Press or to display the conversion loss value for each frequency listed in Table 2-12.
Record any conversion loss reading
not equal
to 30 in Table 2-12 at the appropriate
frequency.
7. If all conversion loss values equal 30 skip to step 8, otherwise continue to step a.
a. Refer to Table 2-12 and press or to select a frequency at which the conversion
loss value does not equal 30
b. Use the analyzer front-panel keys to set the conversion loss value to 30
c. Repeat steps a and b for all frequencies having a conversion loss value other than
30
8. Press on the HP
and set the controls as follows:
CW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310.7 MHz
POWERLEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30
2-58 Adjustment Procedures