222 Options List
C.20 Option 36: Four Configurable Outputs
C.20.1 General Description
Option 36 replaces Option 03 and adds four rear-panel outputs, which may be configured to any
available signal in the 1084A/B/C series clocks. The configuration of the four outputs can be
changed at any time via internal jumper settings.
C.20.2 Specifications
General
Output Connectors: BNC-type RF connectors (4).
Analog Outputs
Output Type Operational amplifier (LF353) output, with 557-ohm series resistor.
Available Outputs: Modulated IRIG-B.
Signal characteristics: IRIG-B time code, modulated onto 1 kHz 4.5 Vpp sine wave carrier.
Digital Outputs
Output Type: High-Speed CMOS (74HC126), 0 to 5 volts, with 47 ohm
series resistance.
Available Outputs: Note: Available on Model 1084A/B/C are shown in Ta-
ble C.16.
IRIG-B: IRIG format B time code (unmodulated).
C.20.3 Changing Outputs via Internal Settings
Case Removal
To change the configuration of Option 36, the top cover of the instrument must be removed. Turn
off the instrument, and disconnect the power cord. Using a T-25 Torx driver, remove the four
screws holding the cover (and rack mount ears, if used) in place, and lift the cover off.
WARNING Do not remove the top cover while power is applied. Hazardous voltages are present
while the power cord is connected. Always disconnect the unit from the input power source before
removal of the top cover.
General Information
Option 36 incorporates a flexible output selection system using jumpers on the Option 36 printed
circuit board. Each of the four rear-panel BNC-type I/O connectors, included with Option 36, can
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