Control Modes; Calibration Of The Internal Time Base - Harris DAC-5016 Installation And Operation Manual

Chapter 1: DAC-5000 Series Digital Analog Clocks

Control Modes

Calibration of the Internal Time Base

8
Table 1-4 lists the Clock Control mode DIP switch options.
Table 1-4. Clock Control Mode DIP switch options
Dip Switch
SW1
SW2
SW3
SW4
SW5
SW6 (Secondary)
This procedure is used to adjust the frequency of the 4.9152 crystal
oscillator. The accuracy of this adjustment directly affects the accuracy
of the Internal Time Base. The only equipment required is a high
resolution frequency counter.
Connect the frequency counter to the clock test point provided at pin 9
of the CMOS NSC800N Microprocessor IC11. Adjust the 6-25 pF
trimmer capacitor connected to pin 11 of IC11 until the counter
indicates 2.457.600 Hz. It is recommended to use the longest sampling
time possible.
5000/5100 Series Digital Analog Clocks Installation and Operation Manual
Switch Options
Open
Timecode
SMPTE
Internal
Normal
Normal
NA
Closed
Impulse
EBU
Line
Use offset
Run on secondary
NA