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Section 5
25
Model 9002
Remote Control Operation
ACT/BYP Status
Binary bit 7 of byte 5, calling for the filter to be active or bypassed, is now selected and inserted in Table 5.6.
SNG/DIF configuration
Binary bit 6 of byte 5, distinguishing between SNG and DIF configuration, is now selected and inserted in Table 5.6.
I/O coupling
Binary bit 5 of byte 5, distinguishing between AC and DC coupling, is now selected and inserted in Table 5.6.
PRE- and POST-gain
The binary digits of byte 6, PRE7-PRE0, represent the Pre-gain. The digits PO7 -PO0, byte 7, represent the Post-
gain. Both gains range from a factor of 1.00 to a factor of 13.75 in digitized increments of .05.
The decimal gain code is calculated by the following formula:
As the gain is incremented in steps of 0.05, the calculated decimal code should be rounded off to the nearest .05.
Decimal, hex, and binary gain code conversions are given in Table 5.9. Intermediate values are obtained by continu-
ing the sequence.
Status ACT
Active 1
Bypass 0
Input DIF
Differential 1
Single-ended 0
Coupling DC
DC Coupling 1
AC Coupling 0
(Gain - 1) x 20 = Decimal gain code
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