Agilent Technologies 8648A User Manual

7-7
Adjustments
Manual Adjustments
Pager Encoder Timebase Frequency Adjustment
Use this procedure to adjust the pager encoder timebase frequency.
Required Test Equipment
• 5334B Option 010 Universal Counter
Procedure
1. Turn off power to the signal generator.
2. Remove the instrument cover.
3. Connect the MOD INPUT/OUTPUT connector of the signal generator to the input of the
universal counter as shown in Figure 7-4.
Figure 7-4. Pager Encoder Timebase Frequency Adjustment Setup
4. Turn on power to the signal generator and let it warm up for one hour.
5. Enter the pager encoder mode by pressing
FM (ENCODER) twice. (If FM was the last
active function, only press the
FM (ENCODER) key once.)
6. Rotate the AMPLITUDE/ENCODER knob to set FORMAT to SERVICE.
7. Press ⇓ (NEXT) and rotate the AMPLITUDE/ENCODER knob to set
CALIBRATION FSK to 3200/2.
8. Press
INCR SET (START/STOP) to turn the encoder output on. The universal counter
should now read close to 1600 Hz.
9. Adjust the variable capacitor on the encoder timebase until the frequency on the
universal counter reads 1600 Hz ±0.0016 Hz. (The capacitor is labeled “TIMEBASE
ADJUST 1EP” in Figure 7-5.)

Agilent Technologies 8648A Specifications

General

Brand	Agilent Technologies
Model	8648A
Category	Test Equipment
Language	English