Chapter 3 131
Manual Adjustment Procedures
5. YTO Adjustment
Equipment
Microwave frequency counter ....................... 5343A Option 001
Adapters
Type N (m) to BNC (f) ................................................... 1250-1476
Type N (f) to 2.4 mm (f) ......................................................11903B
APC 3.5 (f) to APC 3.5 (f) .............................................. 5061-5311
Cables
BNC, 122 cm (48 in) ...........................................................10503A
SMA, 61 cm (24 in) ........................................................ 8120-1578
Procedure
NOTE This adjustment cannot be performed if preselected external mixer
mode is selected.
The SAVELOCK ON OFF function must be OFF.
YTO Main Coil Adjustments
1. Press LINE to turn the spectrum analyzer off. Remove the spectrum
analyzer cover and fold down the A15 RF and A14 frequency control
assemblies.
2. Disconnect the 50Ω termination from the 1ST LO OUTPUT. Connect
the equipment as shown in Figure 3-13 on page 130. Press
LINE to
turn the spectrum analyzer on.
3. Move the jumper on A14J23 from the NORM position (pins 1 and 2
jumpered) to the TEST position (pins 2 and 3 jumpered). See Figure
3-14“YTO Adjustment Locations,” on page 132 for the location on the
A14 frequency control assemblies.
4. On the spectrum analyzer, press the following keys:
CONFIG, EXT MXR PRE UNPR, (UNPR) AUX CTRL, EXTERNAL MIXER,
LOCK HARMONIC, 6 Hz SPAN, ZERO SPAN FREQUENCY, CENTER
FREQ, 18.8893 GHz, SGL SWP SAVE, SAVE STATE, STATE 0
FREQUENCY, 35.7493 GHz SAVE, SAVE STATE, STATE 1 RECALL,
RECALL STATE, STATE 0.
5. On the 5343A, press
SHIFT 7 and set the controls as follows:
Sample rate .......................................... Fullycounterclockwise
10 Hz−500 MHz/500 MHz−26.5 GHz switch ......
500 MHz-26.5 GHz
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