Troubleshooting
Getting Started with Troubleshooting
1-12
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 for troubleshooting. Ensure the signal generator is not being
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 Table1-9 for hardkey and softkey matrix
locations.
Table 1-9
KEYCOL0 KEYCOL1 KEYCOL2 KEYCOL3 KEYCOL4 KEYCOL5 KEYCOL6 KEYCOL7
KEYROW0 softkey 3 N/A Cont Up N/A N/A N/A N/A N/A
KEYROW1 softkey 2 Incr/Set Cont Down Ampl N/A AM Pulse Utility
KEYROW2 softkey 3 Up N/A Freq N/A FM/ϕΜ N/A N/A
KEYROW3 softkey 4 N/A N/A Right
Arrow
Help Save Recall Trigger
KEYROW4 softkey 6 N/A Local Hold Mod On/Off 4 5 6
KEYROW5 softkey 5 N/A Return Down
Arrow
N/A 7 8 9
KEYROW6 N/A N/A N/A Left Arrow RF On/Off 0 . +/-
KEYROW7 softkey 7 N/A Preset N/A N/A 1 2 3
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