Tektronix 2715 Hardware Interface

Theory of Operation
3-68 2715 Spectrum Analyzer Service Manual
The Microprocessor requiresseveral signals. A brief description of these signals,
by connector, is givenin Table 3--18, Table3--19, and Table3--20.
Table3 -18: Power Supply and Serial Bus Connector (J10) Signal Names and
Definitions
Signal Name Description Source Module
DETVID Detected Video: The demodulated AM or FM
signal from the Log Board
Log Board
SWPGATE SweepGate (TTL): Signal that is active during
the sweep
Display Storage
POK Power OK: TellsCPU that the +5 V supply i s OK Power Supply Secondaries
REQI-- Request Interrupt (TTL): I/O Subsystem request
for service
Power Supply Secondaries
UPAUD MicroprocessorAudio: Square wave output at
frequency of the audio tone
Microprocessor
CLKI-- Clock In (TTL): Microprocessor Serial bus input
clock
Microprocessor
CLKO Clock Out (TTL): Serial bus output clock Microprocessor
DATAI DataIn (TTL): Serial bus data in Rear Connector,RF Op-
tions, Front Panel, PLCFC
DATAO DataOut (TTL): Microprocessor Serial bus data
out
Microprocessor
ACKI-- Acknowledge Interrupt (TTL): Enables priority
encoder on Power Supply Secondaries
Microprocessor
LOAD-- Load(TTL): Latches data into receiving module
on serial bus
Microprocessor
ADI0 through
ADI2
Address In (TTL): Address of module on serial
bus requesting service
Power Supply Secondaries
ADO0 through
ADO2
Address Out (TTL): Addressof receiving modul e
on serial bus
Microprocessor
SSTRIG Single Sweep Trigger (TTL): Triggersa si ngle
sweep on the Sweep board
Microprocessor
+5 V +5 V: +5 V digital supply PowerSupply
Hardware Interface