HP 8920A - Audio Analyzer; Audio Source; External Transmitter Key Relay; Interrupt Capability

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Chapter 16, Radio Interface Screen
Radio Interface Functional Description
Audio Source
The Test Set has two audio sources, AFGen 1 and AFGen 2. Either or both of
these sources can be routed to the OPTION INTERFACE connector.
See "Audio
Out" on page 574
.
Audio Analyzer
The Test Set’s audio analyzer can be accessed through the OPTION INTERFACE
connector.
See "Audio Input" on page 574.
External Transmitter Key Relay
Two pins on the Radio Interface are connected in parallel with the Key Out 1 and
Key Out 2 pins on the front-panel MIC/ACC connector.
The Key Out 1 and Key Out 2 pins allow a radio transmitter to be keyed through a
front-panel display field called Ext TX Key. Refer to
"Key Out 1" on page 574 and
"Key Out 2" on page 574.
Interrupt Capability
Two pins on the Radio Interface are designated as Interrupt lines 1 and 2. If
Interrupt 1 or 2 is armed, by selecting Arm on the RADIO INTERFACE screen,
and the corresponding pin is grounded, the word
Tripped is displayed on the
RADIO INTERFACE screen, and a status register bit is set.
Refer to
"Interrupt Input 1" on page 575 and "Interrupt Input 2" on page 575.
+12.6 V, −12.6 V Supplies
The Radio Interface provides +12.6 V and −12.6 V power supplies capable of
powering low-current devices.
Refer to
"-12.6 V" on page 574, and "+12.6 V" on page 574.
Refer to
"Using the Radio Interface (Manual Operation)" on page 463 and "Using
The Radio Interface (Remote Operation)" on page 469
for more detailed
information about using the Radio Interface.