HP 5501A Operating And Service Manual page 169

COMMAND
DATA OR INSTRUCTIONS
OTA INSTRUCTIONS
SET CONTROL CLEAR CONTROL
CLEAR FLAG INSTRUCTION
INSTRUCTION
CLOCKS DATA
OUTPT NOP OUTPUT A-REG
OTA SC OUTPUT TO BUFFER
STC SC, C SET CONTROL, CLEAR FLAG
SFS SC CHECK FLAG
JMP *-I 10746A
CLC SC CLEAR CONTROL
JMP OUTPT, I
Figure 4-5. Sending Data or instructions to the 70746A
4.16 Conversion of Destination and Displacement Information When Using the
10762A Comparator
When utilizing the 10762A Comparator, one of the prime functions of the system controller is
to transmit to the 10762A Comparator the destination address of the object under control.
Since this destination address reflects a displacement in inches or millimetres and the 5501A
Laser Transducer System measures in units of some fraction of the wavelength of laser light,
a conversion has to be made prior to transmitting the destination address. This wavelength of
the laser light is dependent on the environmental conditions under which the measurement is
made, therefore, the conversion must take
this
into account.
The general form for converting to wavelength units is:
*Destination in wave-
length units
Destination in Inches or Millimetres
Environmental Conversion Factor for
= (Compensation Factor
)
*
(
wavelength units
*As noted eadier the 760 count preset must be included in this destination.