Agilent Technologies 35670A Service Manual page 366

HRNGBn
HRNGCn
HRNGDn
OVLDAn
OVLDBn
OVLDCn
OVLDDn
ROW0 - ROW6
SRCn
Voltages and Signals
A13 Primary Keypad
Half Range A — In both the two channel and four channel analyzer, a low on this line turns on
the channel 1 half range LED. This line goes low when the A1 or A2 Input assembly detects
that the amplitude of the channel 1 input signal reached half the set range. This line is HRNGA
inverted by the A11 Keyboard Controller assembly.
Half Range B — In a two channel analyzer, a low on this line turns on the channel 2 half range
LED. In a four channel analyzer, a low on this line turns on the channel 3 half range LED.
This line goes low when the A1 Input assembly detects that the amplitude of the channel 2
input signal reached half the set range or when the A2 Input assembly detects that the
amplitude of the channel 3 input signal reached half the set range. This line is HRNGB
inverted by the A11 Keyboard Controller assembly.
Half Range C — In a four channel analyzer, a low on this line turns on the channel 2 half range
LED. This line goes low when the A2 Input assembly detects that the amplitude of the channel
2 input signal reached half the set range. This line is HRNGC inverted by the A11 Keyboard
Controller assembly. This line is only used in four channel analyzers.
Half Range D — In a four channel analyzer, a low on this line turns on the channel 4 half range
LED. This line goes low when the A2 Input assembly detects that the amplitude of the channel
4 input signal reached half the set range. This line is HRNGD inverted by the A11 Keyboard
Controller assembly. This line is only used in four channel analyzers.
Overload A — In a four channel analyzer, a low on this line turns on the channel 1 overload
LED. This line goes low when the A2 Input assembly detects that the amplitude of the channel
1 input signal exceeded the set range. This line is only used in four channel analyzers.
Overload B — In four channel analyzers, a low on this line turns on the channel 2 overload
LED. This line goes low when the A2 input assembly detects that the amplitude of the channel
2 input signal exceeded the set range. This line is only used in four channel analyzers.
Overload C — In a two channel analyzer, a low on this line turns on the channel 1 overload
LED. In a four channel analyzer, a low on this line turns on the channel 3 overload LED. This
line goes low when the A1 Input assembly detects that the amplitude of the channel 1 input
signal exceeded the set range or when the A2 Input assembly detects that the amplitude of the
channel 3 input signal exceeded the set range.
Overload D — In a two channel analyzer, a low on this line turns on the channel 2 overload
LED. In a four channel analyzer, a low on this line turns on the channel 4 overload LED. This
line goes low when the A1 Input assembly detects that the amplitude of the channel 2 input
signal exceeded the set range or when the A2 Input assembly detects that the amplitude of the
channel 4 input signal exceeded the set range.
Row 0 - Row 7 — When the row lines are set high, the row line that remains low indicates that
a key in that row was pressed.
Source On — A low on this line turns on the source LED. This line goes low when the Source
is turned on.
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Agilent 35670A