Symptom: Hardkeys Or Softkeys Not Functioning - Agilent Technologies PSG Series Service Manual

Troubleshooting
Getting Started with Troubleshooting

Symptom: Hardkeys or Softkeys Not Functioning

Ensure that the signal generator is powered-on and the front panel green LED is on. If the green LED is not
on refer to "Power Supplies" on page 1-17
controlled remotely by pressing the Local hardkey
The A1 Keyboard contains the switches for the hardkeys and softkeys. The keys are arranged in a matrix
with the control lines KEYCOLx and KEYROWx on the x and y axis. When a hardkey or softkey is pressed,
one cell of the matrix is activated. The normally TTL low KEYROWx of the active cell will pulse high and the
normally TTL high KEYCOLx of the active cell will pulse low. See
locations.
Table 1-9
KEYCOL0
KEYROW0 softkey 3
KEYROW1 softkey 2
KEYROW2 softkey 3
KEYROW3 softkey 4
KEYROW4 softkey 6
KEYROW5 softkey 5
KEYROW6 N/A
KEYROW7 softkey 7
1-12
for troubleshooting. Ensure the signal generator is not being
KEYCOL1 KEYCOL2
N/A Cont Up
Incr/Set Cont Down
Up N/A
N/A N/A
N/A Local
N/A Return
N/A N/A
N/A Preset
Table1-9
KEYCOL3 KEYCOL4
N/A N/A
Ampl N/A
Freq N/A
Right Help
Arrow
Hold Mod On/Off
Down N/A
Arrow
Left Arrow RF On/Off
N/A N/A
for hardkey and softkey matrix
KEYCOL5 KEYCOL6
N/A N/A
AM Pulse
FM/ϕΜ N/A
Save Recall
4 5
7 8
0 .
1 2
KEYCOL7
N/A
Utility
N/A
Trigger
6
9
+/-
3