Since these RC combinations have long time constants, they cannot readily respond to the
transients produced at band crossings and scan resets. Therefore, whenever the sample and
hold circuit is holding, R24 to R26 are shorted by Q4 to
QS
respectively.
+9 V and -9 V Reference Supplies
@I
U2B and
U7B
and their associated circuitry form -9 V and
+9
V reference supplies used in
the YTX Driver, and elsewhere in the A6 RF Module.
4
A6A12