18
DEMOD OUT
Recovered (demodulated) audio output
(MONITOR or DUPLEX mode).
MOD OUT
Composite output of internally generated
modulation signals.
EXT MOD IN
External modulation input connector. Requires a
fixed input level of 1V
pk
for accurate level
displays.
MIC
Connector for external accessory microphone.
2-2.4.2 Side Panel Connectors
VGA Port (15 pin)
Provides connection to external VGA for
mat
color monitor.
RS-232 PORT (25 pin)
Provides input/output for printer or control
interface.
2-2.4.3 Back Panel Connectors
10 MHZ STD
BNC connector provides input/output for 10
MHz reference frequency. Input impedance is 50
ohms. Input level requirement is 70 mV to 1
Vrms. Output level is approximately 250 uVrms.
AC POWER Connector
Primary AC power input port.
DC POWER Connector
Primary DC power input port.
2-3 BOTTOM CONTROLS
Internal/External Oscillator Micro-Switch
Used to switch between input and output
configurations for the rear panel 10 MHz
reference oscillator BNC connector.
CAUTION
The analyzer will not function properly if this
switch is set to external without a 10 MHz
reference signal applied to the rear 10 MHz
reference BNC connector.
Internal Reference Oscillator Adjustment
Access
Provides convenient external access to recalibrate
reference oscillator frequency setting.
CAUTION
Use a reliable and accurate frequency
standard when making this adjustment.
115/230 VAC Selector Switch
Used to switch the unit's internal power supply
for either 115V or 230V operation.
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