Keithley 707A Instruction Manual page 149

Maintenance
SELECT
RELAYDATA
UnjTJTJTTLTLrLJ
RELAYDATA
DO
Figure 7
9
Relay
control
waveforms
Repeated
every
1
msec
1
DISPCLK
Repeated
every
1
rnsec
1
895 kHz
KEYCLK
•
Repeated every
1
msec
DISPDATA
Irrsec
KEY DATA
1rrs0C
Figure 7-10
Display
interface
waveforms
7-15