Agilent Technologies Agilent 4396B, Service Manual

Page: 139 / 324

T able 7-1. STEP OSC Frequency
4396B
Center Frequency
STEP OSC
Frequency
Bus Measurement
Limits
1 Hz 470 MHz 1.8359 U 6 0.01 U
80.000001 MHz 490 MHz 1.9140 U 6 0.01 U
160.000001 MHz 510 MHz 1.9921 U 6 0.01 U
240.000001 MHz 530 MHz 2.0703 U 6 0.01 U
320.000001 MHz 550 MHz 2.1484 U 6 0.01 U
400.000001 MHz 570 MHz 2.2265 U 6 0.01 U
480.000001 MHz 590 MHz 2.3046 U 6 0.01 U
560.000001 MHz 610 MHz 2.3828 U 6 0.01 U
640.000001 MHz 630 MHz 2.4609 U 6 0.01 U
720.000001 MHz 650 MHz 2.5390 U 6 0.01 U
800.000001 MHz 670 MHz 2.6171 U 6 0.01 U
880.000001 MHz 690 MHz 2.6953 U 6 0.01 U
960.000001 MHz 710 MHz 2.7734 U 6 0.01 U
1.040000001 GHz 730 MHz 2.8515 U 6 0.01 U
1.120000001 GHz 750 MHz 2.9296 U 6 0.01 U
1.200000001 GHz 770 MHz 3.0078 U 6 0.01 U
1.280000001 GHz 790 MHz 3.0859 U 6 0.01 U
1.360000001 GHz 810 MHz 3.1640 U 6 0.01 U
1.440000001 GHz 830 MHz 3.2421 U 6 0.01 U
1.520000001 GHz 850 MHz 3.3203 U 6 0.01 U
1.600000001 GHz 870 MHz 3.3984 U 6 0.01 U
1.680000001 GHz 890 MHz 3.4765 U 6 0.01 U
1.760000001 GHz 910 MHz 3.5546 U 6 0.01 U
1.819999999902 GHz 930 MHz 3.6328 U 6 0.01 U
e. On the spectrum analyzer , press 4 PEAK SEARCH 5 to move the marker to the peak of the STEP
OSC signal.
f. P erform the following checks to verify the STEP OSC signal at a center frequency of 0 Hz:
i. Check that the 4396B marker reading (STEP OSC signal frequency) is 1.8359 U 6 0.01 U .
The limits are listed in the third column of T able 7-1.
ii. Check that the spectrum analyzer's marker reading (STEP OSC signal level) is between
03 dBm to +5 dBm.
iii. Check that the trace displayed on the spectrum analyzer is as shown in Figure 7-12 .
If the signal is good, continue with the next step .
If the signal is bad, perform the Comb Generator A djustment and Step Pretune Correction
Constants procedures (see the A djustments and Correction Constants chapter). If the
signal is still bad after the adjustments are performed, the STEP OSC is probably faulty .
Replace A5.
Source Group T roubleshooting 7-15