568
S:\HP892XX\USRGUIDE\manual\connkeys.fb
Chapter 24, Connector, Key, and Knob Descriptions
Connector Descriptions
HP-IB
This connector is optional on the HP 8920A.
This connector allows communication between the Test Set and other instruments
or computers using the Hewlett-Packard Interface Bus (HP-IB).
See Also
Chapter 12, "I/O Configure Screen"
HP 8920 Programmer’s Guide
MEMORY CARD Slot
This front-panel opening is where memory cards are inserted.
See Also
HP 8920 Programmer’s Guide
MIC/ACC
This 8-pin DIN connector (see figure 146 on page 570) is used for several
functions:
• Mic In is used to modulate the RF Generator when the KEY IN line is grounded. This
signal is summed with the external MODULATION INPUT signal. The Mod In To
field of the RF GENERATOR screen sets the type of modulation (AM or FM) and sen-
sitivity (%AM/Vpk or kHz/Vpk) for this connection.
• Key In provides control of the RF Generator’s output state (on or off) and automatic
switching between the TX TEST and RX TEST screens (if the CONFIGURE screen’s
RX/TX Cntl functions are set to Auto and PTT). Screen switching occurs when this
line is grounded.
• Key Out 1 and Key Out 2 provide a switch path to control external equipment (such as
keying a transmitter). Key Out 1 and Key Out 2 are connected when the Ext TX key
field is set to On.
CAUTION: Do not exceed 50 Vdc (open circuit) or 250 mA dc (closed circuit) between Key Out 1 and Key
Out 2. Damage to internal components may result.
To Next Page
Loading...
