Icom IC-M710RT Service Manual page 12

(MAIN unit; IC44)–Continued
Pin Port
number name
DATA Outputs data to PLL and DDS ICs.
49
Outputs a clock signal to PLL and DDS
50 CK
ICs.
Outputs an AF mute signal for squelch
51 SQL C function.
High : squelch closed.
Outputs an external NBDP equipment
52 NBS control signal.
Low : during NBDP data output
Outputs a "noise blanker" signal.
53 AGCS
High : noise blanker is on
INC Outputs intercom gate control signal.
54
Outputs a strobe signal for an initial
55 P20
matrix.
57–60 P17–P14 Input ports for an initial matrix.
Output band signals for RF LPF and
61–64 PD–PA
BPF selection.
J2B, R3E,
65–67 Outputs mode signals.
H3E
Input port for an optional AT-130.
KEY
68
Low : during tuning.
Outputs an antenna tuner tuning con-
70 TUNE trol
power/mode control.
Outputs a narrow filter selection sig-
nal.
71 FSEL
Low : for an optional narrow filter
selection.
Outputs a program scan control signal
72 PROG for "AGC fast" and "audio squelch"
deactivation.
Outputs the " tuner start" pulse to an
74 STAT
optional AT-130.
Description
signal for transceiver's
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